Preliminary Design Report

Phase I & II Insertion Device

Beamlines

NE-CAT

 

August 2003

 

 

Malcolm Capel

NE-CAT Lead Scientist,

Associate Director for beamline technology

 

 


 


CONTENTS

1. Introduction

2. Design chANGES FROM cONCEPTUAL dESIGN

3. BEAMLINE TECHNICAL SPECIFICATIONS

4. cOMPONENT DESIGN

5. SAFETY ANALYSIS

6. WORK BREAKDOWN

7. r & d PLANS

8. FIGURES

9. APPENDICES


 

 1. Introduction

The principal aims of the NE-CAT collaboration are the design, construction and operation of undulator and bending magnet-based beamlines for biological crystallographic data collection.  Said beamlines will be highly automated,  possess  high brilliance and narrow band pass suitable for optimized MAD crystallographic data collection. The resulting beamlines will be used mainly in support of NIH National Centers for Research Resource (NCRR)-funded core scientific collaborations.  The core scientific collaborations involve a wide range of structural interests including:  biological signal transduction, DNA transcription (initiation and regulation), cell cycle regulation, virus structure and function, protein folding and protein synthesis (ribosome structure). NE-CAT will also reserve a portion of operational time to support biological crystallography by independent researchers. 

 

The main technological challenge of the NE-CAT NCRR proposal is the use of the tandem-offset undulator concept to increase the number of concurrently-operating undulator beamlines at a single APS sector.  We intend to develop three beamlines using the tandem-canted undulator strategy and a single bending magnet-based beamline.  Our current planning is based on use of a pair of 3.3 cm period undulators, 2.07 meters in length with an angular offset of 1.0 milliradian.   Beamline construction will be split into four phases, summarized in  Table 1.1.  Note: for reasons delineated below the order of construction of the four sector 24 beamlines and the nomenclature used to refer to them have changed since submission of the NE-CAT Conceptual Design Report (see first column, Table 1.1).

 

Table 1.1: Description of NE-CAT Beamlines and Build-Phases

 Build Phase Designation

PDR    CDR

Source

Energy Range (KeV)

Energy Resolution DE/E @  12.7 KeV

Focus Spot Size

m HWHH

End

Station Identifier

Flux

(focused)

@ 12 KeV

Phot/mm2/sec

I         I

U.S. ID

5 – 25

1 x 10-4

100 x100

ID-C

1014

II        III

D.S. ID

12.66 OR

14.78

2 x 10-4

100 x 100

ID-E

1014

III       IV

BM

6 – 17

2 x 10-4

500 x 500

BM-B

1011

IV       II

D.S. ID

9 – 17

2 x 10-4

100 x100

ID-D

1014

 

Key:     U.S. ID : Upstream undulator    

D.S. ID: Downstream undulator

BM: Bending magnet

 

Figure 1.1 shows a schematic of the optical trains for the 3 sector 24 insertion device beamlines, indicating the positions of all main optical elements.  The following list details the overall performance goals for all 4 sector 24 beamlines:

 

1)                  Phase I: “Pass-Through” Undulator Beamline.  The first beamline developed (using the upstream, outboard-projecting undulator) will consist of a single optical train, supplying a single experimental endstation with doubly focused monochromatic light from 5 to 25 KeV, with a nominal band pass of order 10-4 (DE/E).  Monochromitization will be accomplished by a cryogenically-cooled double crystal Silicon Bragg monochromator.  A Kirkpatrick-Baez (K-B) mirror pair will focus the monochromatic beam. 

2)                  Phase II: “Single-Crystal Side-Bounce Undulator Beamline.  A single,side-bounce cryogenically-cooled 220 silicon monochromator will accept the residual beam from a diamond-transmission monochromator using  beam from the downstream, inwardly projecting undulator (see Phase IV, below). The side-bounce mono will deliver a monochromatic beam near 12.6 KeV, with a nominal take-off angle (2θ) of 29.54o from the centerline.  The 220 Si crystal will be mounted on a cooling stage that incorporates a vertical translation.  A second silicon crystal (311-cut) will be mounted on this stage, with independent roll and pitch fine adjustments such that a second energy (14.78 KeV) will be selectable by a vertical translation of the cooling stage (following the same 29.54o take off angle provided by the 220 crystal).  This beamline will also use K-B focusing.

3)                  Phase III: Bending Magnet Beamline.  The fourth beamline developed by NE-CAT will use the bending magnet port of the assigned sector. The phase III beamline will incorporate a water-cooled Si-111 monochromator with sagittal focusing, providing a spectral range from 5 to 17 KeV (2 eV bandpass). Vertical focusing will be accomplished with a mechanically figured mirror.

4)                  Phase IV:  Tunable Large-Offset, Side-Bounce Undulator Beamline.  A pair of beamlines will be sourced by the downstream, inboad-projecting undulator.  Monochromatization and physical separation of the Phase I and Phase III beamlines will be accomplished with a large horizontal-offset (1.5m) diamond transmission monochromator, with a spectral range between   ~8.5 and17 keV.  The undiffracted radiation is passes on to the Phase II Fixed-Energy Side-Bounce monochromator.  As with Phases I and II, Phase III will use K-B focusing.

 

This document presents a detailed preliminary design for Phases I and II only.  Separate PDR’s for the proceeding phases will be submitted for review during the current calendar year. The Phase IV beamline will be developed during the first renewal phase of our NCRR funding.  We do, however, present preliminary, overall hutch layout and conceptual beamline design “sketches  for the side station and bending magnet beamlines in the present document.

 


2. Changes Since Submission of Conceptual Design Report.

Three major changes in our optical design have occurred since submission of our Conceptual Design Report in spring of 2002.  None of these changes have substantively altered the overall beamline layout or long-term work plan. These changes are enumerated below:

 

1) We have reassigned the upstream and downstream undulators to different beamlines.  Originally, we had planned on sourcing the Phase I undulator beamline with the downstream, inwardly projecting undulator and Phase II and IV (PDR teminlolgy) with the upstream undulator.   We realized that it will be far easier to accommodate the Phase II and Phase IV (PDR nomenclature) monochromators if they are situated inboard of the Phase I beam.  With this reassignment of the undulators, the mechanical mounts and cooling systems for Phase II and IV monochromator elements will be oriented away from the Phase I (outboard) undulator beam, minimizing stearic clash between Phases I, II and IV.  The only significant effect of this design change is in the placement of the penetrations in the first and secondary optics enclosures.

 

2) In our CDR we planned on using diamond-based monochromators in all NE-CAT insertion device beamlines.  A patent encroachment suit has been filed by General Electric Corporation against the one commercial diamond vendor capable of sourcing diamonds of the requisite optical quality and size (Sumitomo Electric, Japan).  Thus, all optical quality diamond sales by Sumitomo Electric are embargoed in the U.S. for the foreseeable future.  We have responded to this situation in two ways:  First, we have opted to use cryogenically cooled silicon crystals (111-cuts) in the Phase I monochromator.  An APS crystal mount design exists that is compatible with the Phase I Kozhu monochromator.   Second, we have re-ordered the deployment schedule for the Phase II and Phase IV (PDR nomenclature) monochromators.  Originally we had planned on installing the large-horizontal offset transmission monochromator-based optical train feeding experimental station ID-D; followed by the single crystal side bounce optical system sourcing experimental state ID-E.   Our optical design mandates the use of a diamond transmission monochromator in Phase IV (PDR nomenclature). Also, due to the present difficulty in procuring optical diamonds we have decided to convert the fixed-energy, single side-bounce to a cryogenically-cooled single crystal silicon (220-cut).  This will give us needed breathing room to find a suitable replacement vendor or wait out the legal embargo against Sumitomo-Electric.

3)  An additional tungsten bremsstrahlung collimator (located in the FOE) has been added to simplify the horizontal shielding plan.

 

4)  The length of 24-ID-B has been reduced by 10” on the upstream side to increase the width of the secondary egress path between 24-ID-B and 24-ID-D.

 


 

3. Beamline Technical Specifications.

All four sector 24 NE-CAT beamlines are single-purpose, fixed configuration macromolecular crystallography beamlines.  The following functional elements  must be provided by the various beamline subsystems:

·      Shielding and safety systems must include enclosures for the optics and the experimental hardware and be capable of protecting personnel from radiation and equipment from such faults as loss of power, cooling fluid, etc.

 

·      Optics systems must be capable of delivering a focused monochromatic beam with long-term positional stability to a sample 40-60 meters from the radiation source.  The required positional stability region (horizontal and vertical) is a square of edge length 10 microns with a characteristic time measured in hours.

 

·     Beam transport systems must convey the beam from the sector front end to the sample position via ultra high vacuum paths to minimize intensity loss (due to absorption) and scattering background.

 

·     Utility systems must provide conventional infrastructure such as plumbing of water and compressed gases; electrical power; HVAC capability; liquid nitrogen; and mechanical support.

 

·     Control systems must provide interactive (and secure) local and remote control of all optics, sample handling and detection  subsystems.

 

·     Front ends, insertion devices and dipole magnet must provide an X-ray beam with an energy range of at least ~5KeV to ~30 KeV.

 

·     The lab and office module must provide for mechanical equipment setup and maintenance; wet laboratory capability for sample preparation; and office space for operations staff and data reduction.


The required performance characteristics for the four NE-CAT sector 24 beamlines are:

3.1 Phase I “passthroughbeamline, using outboard-projecting undulator:

·        An energy range of 5-25keV.

·        An unfocused beam of approximately 1012 X-rays/mm2/sec to a sample about 65 meters from the source.

·        A focused beam of approximately 1014 X-rays/mm2/sec to a sample about 65 meters from the source.

·        A focal spot size using mirrors of <100 μm horizontal by <100 μm vertical.

·        A beam with an energy bandwidth of ΔE/E ~1 x 10-4 at an energy of ~12.66 keV.

·        A beam that is stable to <10% of its size (e.g., a 100 μm beam will have a positional stability of 10 μm).

 

3.2 Phase II single-crystal side-bounce beamline using the inboard-projecting undulator:

·        A fixed energy  at ~12.66KeV or 14.78 KeV, with a fixed take-off angle (2θ) of  29.54o.

·        An unfocused beam of approximately 1012 X-rays/mm2/sec to a sample at 58 meters from the source.

·        A focused beam of approximately 1014 X-rays/mm2/sec to a sample at 58 meters from the source.

·        A focal spot size using mirrors of <100 μm horizontal by <100 μm vertical.

·        A beam with an energy bandwidth of ΔE/E <2 x 10-4 at an energy of ~12.66 keV.

·        A beam that is stable to <10% of its size (e.g., a 100 μm beam will have a positional stability of 10 μm).

 

3.4 Phase III bending magnet beamline:

·        An energy range of ~5-17keV.

·        An unfocused beam of approximately 1010 X-rays/mm2/sec to a sample about 35 meters from the source.

·        A focused beam of approximately 1011 X-rays/mm2/sec to a sample about 35 meters from the source.

·        A focal spot size (using either zone plates or mirrors) of <500 μm horizontal by <300 μm vertical.

·        A beam with an energy bandwidth of ΔE/E <4 x 10-4 at an energy of ~12 keV.

·        A beam that is stable to <10% of its size (e.g., a 500 μm beam will have a positional stability of 50 μm).

 

3.5 Phase IV diamond-transmission beamline, using the inboard-projecting undulator:

·        An energy range of ~8.5-17keV.

·        Horizontal offset of monochromatized beam by 1.5 m.

·        An unfocused beam of approximately 1012 X-rays/mm2/sec to a sample about 42 meters from the source.

·        A focused beam of approximately 1014 X-rays/mm2/sec to a sample about 42 meters from the source.

·        A focal spot size using mirrors of <100 μm horizontal by <100 μm vertical.

·        A beam with an energy bandwidth of ΔE/E <2 x 10-4 at an energy of ~12.66 keV.

·        A beam that is stable to <10% of its size (e.g., a 100 μm beam will have a positional stability of 10 μm).

 

 

3.6 End Stations

The sector 24 endstations will incorporate similar designs and subsystems used in the NE-CAT 8BM endstation.  The principal components of all four endstations are:

·        Collimation system, consisting of two independent arrays of pairs of vertical and horizontal slit blade pairs, separated by ~ 1 m.  Individual slit blade positions WILL have a reproducibility of ~ 5μ and operate in roughing vacuum to minimize air scatter and beam intensity degradation via absorption.

·        Fast monochromatic beam shutter with  opening and closing times less than 20 msec, synchronized with the motion state of the crystallographic spindle.

·        Precision crystallographic goniometer (using the Kappa geometry), with remotely controlled X,Y and Z spindle adjustments.  The radius of the sphere of confusion of the crystallographic axis will be less than 20μ.  The minimum stepping unit of the crystallographic scanning axis must be less than 1.75 x 10-5 rad. Maximum stepping rate must be greater than 10o/sec to efficienty support “Friedel Flipping” (inverse beam) data collection.

·        Crystal cryocooler, pneumatically-actuated beam attenuators and split diode beam position monitors (two sets in order to measure beam-angle p).

·        Ionization and sample fluorescence monitors.

·        Precision, remotely steered miniature beam stop.

·        Video microscope capable of visualizing crystals with edge lenths  <10μ.

·        Multi-element fast CCD and detector positioner:

1. active area consisting of at least 4000 x 4000 pixel elements with an effective pixel size less than 100x100 μ.

      Phase I: ADSC Q315: 6000x6000 pixels (315x315 mm active area)

      Phase II,III: ADSC Q210

      Phase IV: ADSC Q315

2. aggregate CCD array readout times less than 2 sec with high sensitivity and low noise.

3. maximum spindle to detector distance (SDD)> 1m, minimum SDD < 0.1 m, with ability to pitch detector about the 2θ axis (LR Desing A-frame).

·        High performance data flow and computational cluster.

 


4. Component Design.

This section describes mechanical and optical components of the Phase I and II sector 24 ID beamlines from the front end to the experimental endstations..  First, a comprehensive list of all optical, mechanical and vacuum system components is presented, followed by a per item description of principal optical components.

 

4.1 Component Listings.

Figure 4.1 and 4.2 consist of plan and elevation views, respectively of the layout for the Phase I (“passthrough”) beamline and layouts for hutches 24-ID-A, 24-ID-B and 24-ID-C.  In this figure, hutch 24-ID-B is shown in the configuration prior to installation of Phase II optical components. Figure 4.3 shows a plan view of the phase II configuration of 24-ID-B and the phase II experimental enclosure 24-ID-E, after installation of the phase II optics. Appendix I contains all sector 24 layout drawings.

 

 

 

 

Table 2.1 sequentially lists major optical or beamline components common to build phases I and II and calls out their displacements from the center of the sector straight.  Table 2.2 lists phase I-specific beamline components, while table 2.3 does the same for build phase II. Column 3 of Table 2.1 calls out drawing number and provenance for said drawing or a vendor part number. Column 4 provides a brief description of each component and indicates the source of the design.  All components indicated by an “M” designation are modified APS standard components, with modifications imposed by NE-CAT. Principal optical component descriptions are rendered in bold text in column 4.

Appendix 3 contains detailed assembly drawings for all principal optical components, including masks, collimators, monochromators, focusing mirror systems and shutters; except for those systems still under design.

 

Table 2.1:  Components common to Phase I and Phase II Optical Trains

Item No.

~Distance from Source

(Meters)

Component Drawing No.

/Provenance

Component Description

S=APS STD     M= Modified APS     N=NEC       V=Vendor

1

24.4

410203013 / APS

Shield Wall Callimator (S)

2

25

3086102

100 l/sec Captor Ion Pump and stand

3

25.6

4102030107 /APS

Exit Mask Assembly  (S)

4

26

4102030111 /APS

Be Window (S)

5

26

4102030108 /APS

Collimator Assembly (S)

6

26

318020

Reducer, 20 l/sec Captor Ion Pump

7

26.4

48236-CE44

Manually Actuated Gate Valve

8

26.5

27600000-00 /NEC

Pump, Mask Support Stand (M)

9

26.5

 

Bellows (4.5” – 6” flange)

10

26.7

 

4” Diam. 6” Flanges Spool

11

26.8

23-7000000 /NEC

Cross,  Titan 600 l/s Ion Pump (M)

12

27.5

  NE-100-01.doc

/IDT

Phase IV Power-Limiting Aperture (variable) (V)

13

27.7 - 32

 

4” Diam, 6” Flange Spools,

14

32

2860000000 /NEC

Pump, Collimator Support Stand (S)

15

32.3

  NE-100-01.doc

/IDT

Phase I-Phase II Fixed Apertures (fixed) (V)

16

32.8

21-100000 /NEC

Tungsten Bremsstrahlung Collimator 4, w. integral bellows.  Two  9.5x9 (HxV) mm bores (added since PDR submission). (M)

17

33.2

23000100-00 /NEC

Lead Collimator 5

45 x 15 (HxV) mm bore. (M)

18

33.6

23-600000 /NEC

Cross, Titan 800 l/s Ion Pump (M)

19

33.5

 

Bellows

20

33.9

Series 10 /VAT

Gate Valve, 8” flange

21

34

 

8” Flange Spool, pump port, ion gauge port

22

34

 

Downstream Wall of FOE (24-ID-A)

23

34-46

ANL24IDWBT1001

/TECKNIT

Coffin-style White Beam Transport 6” diam spools. (V)

24

46.2

 

Upstream WALL of SOE (24-ID-B)

20

46

 

8” Flange Spool, pump port, ion gauge port

21

46.1

Series 10 /VAT

Gate Valve, 8” flange.

22

46.1

29600000 /NEC

Pump, Mask Support Stand (M)

22

46.2

 

Bellows

23

46.5

23-600000 /NEC

Cross, Titan 800 l/s Ion Pump.  (M)

24

47

  NE-100-01.doc

/IDT

Phase II Power-Limiting Aperture (variable).  (V)

25

47.6

2160000 /NEC

Tungsten Bremsstrahlung Collimator 6, w. integral bellows.  Two  14x12 (HxV) mm bores (M)

26

47.7

23000100 /NEC

Lead Collimator 7 45 x 15 (HxV) mm bore. (M)

27

48.2

/APS

Water-cooled Phase II temporary White Beam Stop (S)

28

48.1

 

Bellows

29

48.2-50.2

 

6” Diam, 8” Flange spools.

30

50.2

Series 10 /VAT

Gate Valve, 8” flanges.

31

50.3

 

Bellows

32

50.4

 

4” Diam 6-8” flange spool

33

50.3

26600000 /NEC

Pump, Mask Support Stand (M)

34

50.5

23-7000000 /NEC

Cross,  Titan 600 l/s Ion Pump (M)

 

 

 

Table 2.2: Phase I (Passthrough)– specific optical components.

Item No.

~Distance from Source

(Meters)

Component Drawing No.

/Provenance

Component Description

S=APS STD     M= Modified APS     N=NEC       V=Vendor

1

51.2

  NE-100-01.doc

/IDT

Phase I Power-Limit Apertures (variable)

Using working apertures. (V)

2

51.7

 

6” Diam, 8” flange spool.

3

51.8

Series 10 /VAT

Gate Valve, 6” flanges.

4

52.2

110550-0001B

GeneralA1

HLD-4_SPEC-V3.DOC

/KOHZU

Kohzu HLD-8-24 cryo-cooled monochromator.

Si-111 crystals, 25 mm vertical offset. (V)

5

52.8

HLD-3B /KOHZU

Kohzu HLD-3B Beam Monitor. (V)

6

53.1

/Oxford-Danfysik

Oxford-Danfysik split diode beam position monitor. (V)

7

53.2

 

Bellows

8

53.5

Series 10 /VAT

Gate Valve, 6” flanges.

9

53.5

27700000 /NEC

P4-50 Support Stand, 600 l/s Titan ion pump (S)

10

54

23-200000 /APS

P4-50 Integrated white beam stop, collimator and shutter. (S)

11

54.5

 

Bellows

12

54.5-55.5

 

3” Diam, 6” Flange spool.

13

54.8

 

Downstream  wall of SOE (24-ID-B) - contiguous to upstream wall of 24-ID-C.

14

55.5

Series 10 /VAT

Gate Valve, 6” flanges.

15

55.6

 

Bellows.

16

57

AHM2289

S0800 NE-CAT

FDA.DOC

/Oxford-Danfysik

Oxford-Danfysik Integrated Kirkpatrick-Baez focusing system.

1.2 m long ULE HFM (4-point bender)

1.0 M long ULE VFM (4-point bender)

2 600 l/s Titan Ion Pumps. (V)

17

58.8

 

Bellows

18

59

Series 10 /VAT

Gate Valve, 8” flanges.

19

69-62

 

6” Diam, 8” Flange spools, w. 300 l/s Ion Pump

20

62

Series 10 /VAT

Gate Valve, 8” flanges.

21

62

3603_aux_stand /LRD

L-R Design auxiliary support stand. (V)

22

62.2

 

Be window.

23

62.2

 

Bellows.

24

62.3

JJ-SLITS.DWG

/JJ-XRAY

JJ-Xray in vacuum X-Y Tungsten-blade slit system (V)

25

62.5

UHV-QUAD.doc

/Oxford-Danfysik

Oxford-Danfysik split diode beam position monitor. (V)

26

62.7

PF2S2

PF4

XIA pneumatically actuated shutter and attenuator assembly. (V)

27

63.3

25000000 /NEC

Extensible, evacuated collimator assembly. (N)

28

63.9

SL-TU-100-25 /ADC

ADC in vacuum X-Y Tungsten-blade slit system. (V)

29

63.9

3604-053

/LRD

L-R Design Goniometer support stand + collimator  alignment system + LR-Design Kappa goniometer + L-R Desing steerable beam stop. (V)

30

65

3601Det-Support /LRD

L-R Design detector positioning system + ADSC Q315 multi-cell CCD detector system. (V)

 

Table 2.3: Phase II (Single Side bounce)– specific optical components.

Item No.

~Distance from Source

(Meters)

Component Drawing No.

/Provenance

Component Description

S=APS STD     M= Modified APS     N=NEC       V=Vendor

1

51

  NE-100-01.doc

/IDT

Phase II Power-Limit Apertures (variable).

Using variable apertures. (V)

2

48.3

 

Bellows.

3

48.5

E1107 Proposal.doc

/Oxford-Danfysik

Oxford-Danfysik Single-crystal, side bounce mono-chromator. (V)

4

49.4

Series 10 /VAT

Gate Valve, 6” flanges.

5

49.5

P4105090908 /APS

P8 Shutter, 600 l/s Titan Ion Pump, Shutter support stand. (S)

6

50

 

Bellows

7

50.76

/Oxford Danfysik

Oxford-Danfysik Horizontal focusing element of K-B pair.  4-point bender, 1 m long mirror. (V)

8

51.1

 

Bellows

9

51.1-53.4

 

2” Diameter 4” Flange Spool.

10

54.4

/Oxford-Danfysik

Oxford-Danfysik Vertical focusing element of K-B pair.  2-point bender, 1 m long mirror. (V)

11

55.2

 

Bellows

12

55.2-57.4

 

6” Diam, 8” Flange spool.

13

57.4

Seris 10

Vat Gate Valve, 8” flanges.

14

57.5

3603_aux_stand /LRD

L-R Design auxiliary support stand. (V)

15

57.7

 

Be window.

16

57.7

 

Bellows.

17

57.8

JJ-SLITS.DWG

/JJ-XRAY

JJ-Xray in vacuum X-Y Tungsten-blade slit system (V)

18

58

UHV-QUAD.doc

/Oxford-Danfysik

Oxford-Danfysik split diode beam position monitor. (V)

19

58.2

PF2S2

PF4

XIA pneumatically actuated shutter and attenuator assembly. (V)

20

58.8

25000000 /NEC

Extensible, evacuated collimator assembly.(N)

21

59.4

SL-TU-100-25

ADC in vacuum X-Y Tungsten-blade slit system. (V)

22

59.4

3604-053

 

L-R Design Goniometer support stand + collimator  alignment system + LR-Design Kappa goniometer + L-R Desing steerable beam stop. (V)

23

60.5

3601Det-Support

L-R Design detector positioning system + ADSC Q315 multi-cell CCD detector system. (V)

 

4.3 Principal Component Descriptions

4.3.1 Common Optical Components

4.3.1.1 Instrumentation Design Technology LDT (IDT) Phase IV Power Limiting  Aperture Mask Assembly (non-standard).

The purpose of this component is to limit the power deposited on the first crystal of the phase IV large horizontal offset diamond monochromator, that will be installed in the first renewal phase of our NIH funding approximately 3-4 years hence.  The design is conceptually similar to that of the APS L5-92 mask, modified to accommodate two undulator beams with an angular separation of 1mrad. Until the build phase IV monochromator is installed this aperture will be locked in its most permissive geometry, equivalent to a square aperture 4.5 x 4.5 mm.

The design rationale behind all IDT apertures (Power-Liming (3 instances) and Fixed aperture (1 instance) are discussed in detail under section 4.4.2 of this document.  Appendix 3.10 contains both the design specification and the results of finite element thermal simulations of the response of the fixed-aperture IDT mask design to exposure to the tandem-undulator under normal and maximal beam mis-steering conditions.

 Conceptual Design Power Limiting Mask.

 


 

4.3.1.2 IDT Phase I and II Fixed Aperture Mask Assembly (non-standard).

See discussion under 4.3.1.1

The principal purpose of this element is to protect a tungsten bremsstrahlung collimator located immediately downstream from this mask from overheating by a mis-steered white undulator beam.  The design is functionally similar to an APS L5-92 mask, modified for use in the context of the tandem undulator.

 

Conceptual Design of Fixed Aperture Mask.

 

4.3.1.3 Tungsten Bremsstrahlung Collimator 4 (modified-standard).

This collimator is the first non-front-end associated bremsstrahlung collimator.  The design is a slight modification of a standard APS tungsten collimator (APS K5-20).  Instead of a single wide bore this collimator has two bores 9.5 x 9 (h x v) mm, centered on the two undulator beams.  Bore size was determined by the spread of the extremal synchrotron  rays with sufficient leeway to provide a clearance of at least 2 mm horizontal and vertical.  This mask is protected from illumination by the white beams by the fixed aperture mask (see 4.3.1.2).  Drawings are provided in Appendix 3.11.

 

4.3.1.4 Lead Bremsstrahlung Collimator 5 (modified-standard).

This is a standard lead collimator sized in the horizontal direction to comply with bremsstrahlung shielding requirements.  This collimator is connected to the first tungsten collimator via a rotatable flange.  The tungsten collimator has an intrinsic formed bellows to provide compliance at this flange join.  The internal channel width and high of this collimator is such than only the tungsten collimator is considered during survey and alignment of this pair of collimators (via the kinematic table surface adjustments).  The fixed a mask (4.3.1.2) has its own independent motorized translators for alignment.

 

4.3.2 Phase I – Specific Components

4.3.2.1 IDT Phase I Power Limiting Mask Assembly (non-standard).

            See discussion under 4.3.1.1

This mask pair will be used to limit the power load on the phase I monochromator.  Both mask elements have one precision L-shaped tungsten insert in its respective corner of the conjoint aperture formed by the mask pair to minimize scatter from the aperture.

 

4.3.2.2 Kohzu HLD-8-24 Cryo-cooled Silicon Double Crystal Monochromator (standard).

The phase I monochromator is a modification of the standard Kohzu HLD-4 monochromator in operation at COM-CAT and SGX-CAT.  This is a vertically offset monochromator with a built in video-based beam position monitor (HKD-3.B), originally designed to operate with a pair of water-cooled diamond crystals. The main modification from the HLD-4 design is the inclusion of a liquid nitrogen bayonet-type rotational feed through in addition to the normally available water feed-throughs so that we can operate with a pair of liquid-nitrogen cooled silicon crystals. The complete design specification of the HLD-8-24 and assembly drawings is present in Appendix 3.1.

 

We will use the crystal and crystal mount design used by APS sector 4 in its Kohzu APM-5 monochromator (see Appendix 3.2, 3.3).  The first crystal is a monolithic block with a simple LN2 cooling channels and no undercut.  The second crystal passively cooled through an LN2-cooled OFHC block and is long enough that no parallel translation of the crystal is required to track the beam across its entire spectral range.

 

4.3.2.3 Oxford-Danfysik UHV Split-diode Beam Position Monitor (non-standard).

Currently under design, this device will allow determination of the monochromatic beam position to an accuracy of 2-5 microns using the SBC-developed spit diode BPM installed in a UHV cross.  A rendering of the design is present in Appendix 3.5.

4.3.2.4 P4-50 Integrated White Beam Collimator Beam Stop (standard).

The Phase I photon shutter is an APS standard P4-50 integrated collimator white beam stop, situated on an APS standard support table.

 

4.3.2.5 Oxford Danfysik Integrated Kirkpatrick-Baez Focusing System (non-standard).

The Phase I beam line will use Kirkpatrick-Baez focusing.  To conserve longitudinal space in the experimental enclosure we have worked with Oxford-Danfysik to develop and integrated support system for enclosing both the Horizontal Focusing Mirror (HFM) and the Vertical Focusing Mirror (VFM) in a single vacuum vessel, supported from a single vibration isolation platform  (Appendix 3.4, 3.5).  We hope that this design, in addition to conserving linear space will also provide increased stability since both the HFM and VFM will be exposed to very similar vibrational environment. Both mirrors are fabricated from ULE, have rhodium, platinum and coating-free strips, and are clamped in 4-point mirror benders (SESO).  The HFM mirror is situated upstream of the VFM and is 1.2 meters in length.  The VFM is 1 m in length.  Mirrors have the expected kinematic positioning systems that also provide pitch and roll adjustments.  All axes are associated with precision incremental encoders.  Additionally, a fast-response piezoelectric actuator provided for rapid, fine adjustment of the pitch of both mirrors.

The design specification and assembly drawings of the phase I focusing system and shadow ray-casting simulations of the focus spot  are attached in Appendix 3.6. 

 

4.3.3 Phase II – Specific Components

4.3.3.1 IDT Phase II Power-Limiting Mask Assembly (non-standard).

            See discussion under 4.3.1.1

This mask pair will be used to limit the power load on the phase II monochromator.  Both mask elements have one precision L-shaped tungsten insert in its respective corner of the conjoint aperture formed by the mask pair to minimize scatter from the aperture.

 

4.3.3.2 Oxford-Danfysik Cryo-Cooled Single Crystal Side-Bounce Monochromator   (non-standard).

The Phase II monochromator will consist of a liquid nitrogen-cooled  Si crystal (220) aligned to provide a fixed-energy beam (12.662 KeV) with a take-off angle of 29.59o.  The Si crystal will be mounted on a cooling plate along with another Si crystal with a  311 cut, capable of providing a monochromatic beam at 14.78 KeV along the same traverse as the first crystal.  Selection between the two crystals will be effected by a simple vertical translation of the entire cooling block.  The second crystal will have independent fine pitch and roll adjustments.  We plan to use this configuration to  perform MAD data collection in the 2-energy mode, or monochromatic data collection at the high or low energy.  Critical issues of the design include thermal stability of the crystal stack and the practicality of fine steering of the low and high energy beams over the same narrowly-defined traverse.  We are collaborating with Oxford-Danfysik to effect the design and construction of this monochromator, using subassemblies Oxford-Danfysik has used in prior designs.

The design specification and model design renderings are presented in Appendices 3.7 and 3.8.

 

4.3.3.3 Phase II Permanent and Temporary Water-Cooled Beam Stop (non-standard).

A water-cooled white beam stop will be situated on the main support stage of the Phase II monochromator to permanently stop residual pink beam.  The beam stop will consist of an inclined block (< 10o) block of glidcop with internal joint-free copper water-cooling channels.  Until the Phase II monochromator is installed, the inboard-projecting undulator will be administratively locked at maximum permissible gap.  An additional safety margin will be provided by installing a temporary water-cooled glidcop white beam stop in a spool-piece attached downstream to lead collimator 7 (without interference to the outboard undulator beam).  The temporary stop will also block residual radiation originating from the sector 24-dipole that enters the canted tandem front end.  The temporary phase II stop will be designed by S. Sharma’s group.

 

4.3.3.4 P8 Monochromatic Shutter (standard).

The monochromatic Phase II beam will be stopped using a standard APS P8 photon shutter, situated on a shortened standard support table.

 

4.3.3.5 Oxford-Danfysik Horizontal Focusing Mirror System (non-standard).

As with Phase I, Phase II focusing will use the Kirkpatrick-Baez geometry.  However, due to space limitations in the SOE and 24-ID-E we cannot use the integrated solution used in Phase I, without reverting to an undesirably high demagnification geometry for the VFM.

We will instead, use a conventional design that physically separates the VFM and HFM.  The HFM will consists of a 1.2 m long ULE pre-figured meridional cylinder with rh, pt and bare strips, selectable by translation of the kinematic mount.  The mirror will be mechanically fine-figured with a SESO 4 point bender.

 

4.3.3.6 Oxford-Danfysik Vertical Focusing Mirror System (non-standard).

The VFM will be located immediately next to the SOE – 24-ID-E partition and will us a 1 m long ULE mirror in a 2-point SESO bender.  As with the Phase I K-B system the Phase II K-B system will have peizo-electric pitch adjusters for rapid-fine tune of both pitch axes.

The design specification and assembly drawings of the phase II HFM and VFM and shadow ray-casting simulations of the focus spot  are attached in Appendix 3.6. 

 

4.3.4 Common Endstation Components

All elements of the sector 24 endstation design will recycle designs successfully used in the construction and operation of NE-CAT beamline 8BM.  All component descriptions in this session are referents to a corresponding entry in an Appendix providing detail drawings each component.

 

4.3.4.1 JJ-Xray in vacuum X-Y Tungsten slit blade Assembly.

            Appendix 3.13

4.3.4.2 Oxford-Danfysik in vacuum Split-diode Beam Position Monitor.

            Appendix 3.14

4.3.4.3 X-ray Instrumentation Associates pneumatically-actuated Shutter and Beam Attenuator.

            Appendix 3.15

4.3.4.4 Extensible, Evacuated Collimator Assembly.

Appendix 3.16

4.3.4.5 ADC in vacuum X-Y Tungsten Slit Blade Assembly.

            Appendix 3.17

4.3.4.6 Miniature in-line Ion Gauge.

            Appendix 3.18

4.3.4.7 LR-Design Steerable Beam Stop.

            Appendix 3.19

4.3.4.8 LR-Design Goniometer Support, Kappa Goniostat.

Appendix 3.20

4.3.4.9 LR-Design A-Frame Detector Support System.

            Appendix 3.21

4.3.4.10 Area Detector Systems Corp Q315/Q210 Multicell CCD Detector System.

            Appendix 3.22

4.3.4.11 Console Distributed Control System; Data Flow Network

            Appendix 4.1, 4.2


4.4 Phase I and II Ray Tracing Diagrams.

All ray tracing figures accompanying this document have been revised relative to those submitted in the NE-CAT PDR to reflect configuration changes in the optics and the canted undulator front end design .  We presume two undulators of approximately 2.07 length, 3.3 cm periodicity, installed in our sector straight, with a 1.0 mrad angular separation of the two undulator beams. The front end configuration and general plan for ray projection are taken from Y. Jasky’s anamorphic drawings dated 08/07/03.

Figures 4.4 and 4.5 show the horizontal and vertical bremsstrahlung radiation ray tracing. Figures 4.6 through 4.8 show the horizontal and vertical synchrotron ray tracing.  Figures 4.10-4.12 show the diagrams for the central synchrotron radiation rays for the monochromatic beam, indicating the offset from the monochromator and the deflections from the mirrors, and the location for the monochromatic beam stops.

 

4.4.1 Bremsstrahlung Ray Tracing

 

Figures 4.4 and 4.5 show the horizontal and vertical bremsstrahlung radiation ray tracing diagrams, respectively.  The principal purpose of the second tungsten bremsstrahlung collimator  (SOE) is to limit the vertical extremal bremsstrahlung rays permitted by the vertical bore of tungsten collimator 4 (see figure 4.6), which would have passed through the vertical bore of lead collimator 7.

Fig. 4.4 Horizontal Bremsstrahlung Ray Tracing Diagram.

 

Fig. 4.5 Vertical Bremsstrahlung Ray Tracing Diagram.

 

Note that a two channel water-cooled high-heat-load fixed copper mask (bore dimensions: 4.5 x 4.5 mm) is placed immediately upstream of the first bremsstrahlung (FOE) collimator to protect the interior bores from possible beam mis-steering (see figures 4.6 - 4.8).  Additional protection for the two tungsten collimators is provided by the 2 sets of power-limiting apertures on the in-board optical line.  The bore of the fixed copper mask and the geometry of the tungsten collimator bores provide at least 2 mm clearance between the extremal synchrotron rays and the interior bores both tungsten collimators.  All collimators are mounted on high load support tables with a kinematic  surface plate.  The surface plate incorporates precision jacks and dove-tail slides for precise alignment of the tungsten mask bores relative to the two undulator beam.s  The large internal bores of the lead collimators guarantee no interference with the alignment of the tungsten collimators.  All synchrotron masks are mounted on the same tables through motor-driven translator stages with independent X,Y, pitch and yaw adjustments. Thus, only the alignment of the tungsten collimators is involved in setting the position  of the surface plate of the support tables.

 Table 4.1 lists all bremsstrahlung collimators (including front end components), their type, distance from the center of the straight and parameters of the collimator bores.  Table 4.2 tabulates the external dimensions of non-front end bremsstrahlung collimators. Both tungsten collimators are dual channel, and channel separation (bore center to bore center) is listed in the 6th column of table 4.1. There is an asymmetry in the horizontal bore dimension of the second tungsten collimator, mandated by the minimum clearance between bore interior and the extremal synchrotron rays. Dimensions listed for the lead collimators are those for the interior of the lead bore not the spool piece bore (shielding aperture not optical aperture).  The optical aperture of the lead collimators is used in all ray trace diagrams.

 

TABLE 4.1:  Bremsstrahlung collimators:  Aperture Geometry

 

No.

TYPE

DISTANCE FROM

SOURCE (m)

HORIZONTAL SIZE

(mm)

VERTICAL SIZE

(mm)

APERTURE SPACING

(mm)

1

Front End Horizontal

Shielding Block

19.5

46

NA

NA

2

Front End

Wall Collimator

23.6

56

26

NA

3

Front End

Exit Collimator

25.7

40

8

25.8

4

Tungsten

Dual Aperture

32.7

9.5

9

32.9

5

Lead

Single Bore

33.0

48.4

18

NA

6

Tungsten

Dual Aperture

47.4

11 (INBOARD)

13.5 (OUTBOARD)

14

47.5

7

Lead

Single Bore

47.6

72.9

21

NA

 


 TABLE 4.2:  Bremsstrahlung collimators:  External Shielding Dimensions

 

No.

TYPE

DISTANCE FROM

SOURCE (m)

Width

(mm)

Height

(mm)

Length

(mm)

4

Tungsten

Dual Aperture

32.7

120

83

170

5

Lead

Single Bore

33.0

406

203

305

6

Tungsten

Dual Aperture

47.4

120

83

170

7

Lead

Single Bore

47.6

406

203

305

 

 

4.4.2 Synchrotron Radiation Ray Tracing

Figure 4.6 shows the horizontal synchrotron ray tracing for both phase I and phase II beamlines.  The vertical synchrotron ray traces for phases I and II  are shown separately in figures 4.7 and 4.8, respectively. The internal bores of all collimating elements (lead and tungsten) are separated from the nearest extremal synchrotron ray by at least 2 mm.   All synchrotron masking is accomplished using a similar dual channel mask design to be supplied by Instrument Design Technology LDT (Manchester U.K.).  Two classes of mask are employed: 1) fixed aperture and 2) power-limiting.

Fig. 4.6 Horizonal Synchtrotron Ray Tracing Diagram.

 

Fig. 4.7 Vertical Synchrtron Ray Tracing Diagram, Phase I.

 

Fig. 4.8 Vertical Synchrotron Ray Tracing Diagram, Phase II.

 

A fixed aperture mask consists of a pair of high-heat load collimating elements installed in tandem in the optical train.  Each collimating element of the pair is fabricated from 200 mm long oxygen-free copper (OFHC) blocks with internal water cooling channels and two bores: 1) a working bore 4.5 x 4.5 mm in size, centered on one of the two undulator beams; 2) a large 20 x 20 mm “compliance” bore, centered on the opposing undulator beam. The opposite element of the pair has the same configuration, but rotated about the central axis of the beamline by 180o. The working bore follows a 150 mm long lead-in taper with a 3o opening angle in order to keep that maximum power density deposited on the OFHC block below 235 W/mm2 (maximum beam mis-steering). Both mask elements are mounted on independent Y-Z precision translators.  Mask pairs are interconnected via bellows with an internal radius providing 13 mm of clearance relative to the beam. The compliance bore permits unconstrained alignment of the working bore relative to the beam it is intended to mask.  The fixed aperture bores are aligned so that both undulator beams pass down the central channel of its respective working bore.

A power limiting mask has a similar configuration to the fixed aperture mask pair, except that both working bores of the mask pair are aligned on the same undulator beam.  An L-shaped tungsten blade is brazed into opposing corners of the mask pair’s working bores.  The two tungsten blades are then translated along a diagonal connecting the two blades to independently limit the Y and Z extent of the passed beam and thereby the power deposited on downstream monochromatizing elements.  Each planned ID monochromator will have a power-limiting mask pair installed immediately upstream of its position.   Figure  4.9 presents the conceptual designs underlying both mask types.  Table 4.3 summarizes the placement and the bore geometry of all synchrotron masks.  In this table, the Distance from Source (column 2) is the distance from the straight center to the center of the bellows connecting the mask pair.

IDT is currently finalizing designs for both the fixed and power-limiting mask pairs.  We have contracted with them for a complete thermal analysis of the fixed-aperture mask using a preliminary model design.  This analysis, using the performance characteristics of a full-length undulator A , operating at 100 mA ring current predicts a maximum temperature rise of the OFHC mask block of less than 120oC under conditions of  maximal permitted beam mis-steering.  Simulated peak inner coolant wall temperature does not exceed 40oC, so local coolant boiling should not be a concern.  The Phase IV power limiter masks will be administratively locked in its most permissive configuration until installation of the Phase IV large offset transmission monochrmator.  The Phase II and Phase I power limiters  are placed at positions where the maximum power density is a fraction of that the fixed aperture is exposed to.

Since the canted tandem undulator produces approximately 80% of the power output of  a conventional undulator A  and since the APS-sanctioned thermal rise for OFHC is 150oC we should have sufficient operational “head-room” to accommodate a planned 130-150 mA APS operational modes.  IDT’s thermal simulation is presented in Appendix 3.10 of this report.

The Phase I optical train ends in the SOE with a standard P4-50 integrated collimator- white-beam stop, centered on the outboard undulator beam at approximately 54 m front the straight center.  Prior to the installation of the Phase II single-side-bounce monochromator a water-cooled inclined glidcop block will be installed in a spool attached to the downstream flange of lead collimator 7 (48.2 m) to specifically stop the inboard undulator white-beam.  This stop will be designed by Shusil Sharma and fabricated locally and will be capable of tolerating the unattenuated output of the inboard undulator with a temperature rise < 150oC.  The inboard undulator (sourcing the Phase II optical train) will be administratively “locked” to open gap until the Phase II monochromator and beam line are installed.  The Phase II single crystal monochromator will incorporate a fixed water-cooled white beam stop immediately downstream of the crystal goniometer.  An APS P-8 monochromatic shutter will be placed immediately after the Phase II monochromator on the monochromatic optical leg that diverges from the undulator ray with a fixed take off angle of 29.75 o (Si 220 tuned to the peak of the selenium K-edge).

 

TABLE 4.3: Synchrotron radiation white beam collimators:

Locations and Aperture Sizes

COLLIMATOR

DESIGNATION

~DISTANCE FROM

SOURCE (m)

HORIZONTAL SIZE

(mm)

VERTICAL SIZE

(mm)

Phase IV

Power Limiter

27.5

4.5

4.5

Fixed

Aperture

32.3

4.5

4.5

Phase II

Power Limiter

50.6

4.5

4.5

Phase II

White Stop

48.2

STOP

STOP

Phase I

Power Limiter

51.2

4.5

4.5

Phase I

White Stop

h(P4-50)

54

STOP

STOP


 


 
5. SAFETY ANALYSIS

5.1 Shielding

5.1.1 Radiation Enclosures

The shielding has been designated in accordance with the Guide to Beamline Shielding Desing at the Advanced Photon Source (April 2002).  Table 5.1 summarizes required lead shielding thickness on a per-wall, per-hutch basis. Table 5.2 summarizes all hutch door specifications, while Table 5.3 list all hutch penetrations.  The complete hutch specification document is included as Appendices 5.1 and 5.2.

Table 5.1: Lead Thickness Requirements per Hutch

Hutch

Upstream Wall Panel (mm)

Lateral Panel (mm)

Roof Panel    (mm)

Downstream Wall Panel (mm)

24-ID-A White Beam

NA

19

12

50

24-ID-B White Beam

19

19

12

40

24-ID-C Mono Beam

10

10

6

12

24-ID-D Mono Beam

10

10

6

12

24-ID-E Mono Beam

10

10

6

12

 

 

 

 

 

 

 

 

 

 

 

 

Table 5.2: Hutch Door Inventory

Enclosure ID

Type

Placement

24-ID-A

Recessed, Triple Panel:

1)       upstream door opens pneumatically,

upstream.

2)       Middle door opens manually up or downstream.

3)      Downstream door open manually, downstream.

Outboard Wall

24-ID-B

Recessed, Double Panel:

1) Upstream door opens manually, upstream.

2) Downstream door opens pneumatically downstream

Upstream, Outboard Wall

24-ID-B

Recessed, Double Panel:

1)       Upstream door opens pneumatically, upstream.

2)       Downstream door opens manually, downstream.

Downstream, Inboard Wall

24-ID-C

Non-recessed, Double Panel:

1)      Upstream door opens manually, upstream.

2)       Downstream door opens pneumatically downstream.

Downstream,Outboard Wall

24-ID-D

Non-recessed, Double Panel:

1)       Upstream door opens manually, upstream.

2)       Downstream door open pneumatically, downstream.

Outboard Wall

24-ID-E

Non-recessed, Double Panel:

1)      Inboard door opens pneumatically, inboard.

2)       Outboard door opens manually, outboard.

Downstream Wall

24-ID-E

Non-recessed, Double Panel:

1)       Upstream door opens manually, upstream.

2)       Downstream door opens pneumatically, downstream.

Wall Parallel to Mono Beam

 

Table 5.3: Beam Entry/Exit Penetrations and Guillotines.

 

Hutch Label

Penetration Purpose

Penetration Location

Penetration Diameter

Drawing Reference

Associated Guillotine

24-ID-A

Phase I and Phase II Fixed Energy exit to

WhiteBeam Transport

Downstream Wall

10”

Beam Exit End Elevation

20-000021-00 (24_IDA_layout.dwg)

No

24-ID-A

Phase II Tunable, Exit to 24-ID-D monochromatic hutch

Downstream

Wall

4.75”

Beam Exit End Elevation

20-000021-00

(24_IDB_layout.dwg)

Yes

24-ID-B

Phase I & Phase II Fixed Energy entrance from

White Beam Transport

Upstream

Wall

10”

Beam Entry End Elevation

20-000023-00

(24_IDB_layout.dwg)

No

24-ID-B

Phase III Fixed Energy Exit to

24-24-ID-E monochromatic hutch

Outboard Wall

4.75”

 

29.5o angle

Front (outboard) Elevation

20-000023-00

(24_IDB_layout.dwg)

Yes

24-ID-B

Phase I exit to 24-ID-C monochromatic hutch

Downstream

Wall

4.75”

Beam Exit End Elevation

20-000023-00

(24_IDB_layout.dwg)

Yes

24-ID-C

Phase I entrance from 24-ID-B

Upstream

Wall

4.75”

Beam Entry End Elevation

20-000025-00

(24_IDC_layout.dwg)

No

24-ID-D

Phase II Tunable, Entrance from 24-ID-B

Upstream

Wall

4.75”

Beam Entry End Elevation

20-000027-00

(24_IDD_layout.dwg)

No

24-ID-E

Phase III Fixed Energy Entrance from 24-ID-B

Inboard

Wall

4.75”

29.5o angle

Rear (inboard) Elevation

20-000029-00

(24_IDE_layout.dwg)

No

 

5.1.2 Bremsstrahlung Shielding

Paired tungsten and lead bremsstrahlung collimators will be installed in both the FOE and SOE. Both tungsten bremsstrahlung collimators have dual bores centered on their respective undulator beams.  These bores are sized such that there is at least 2mm clearance (horizontal and vertical) between the bore walls and both undulator beams under conditions of maximum allowed beam mis-steer. Ray tracing studies indicate that our bremsstrahlung mitigation plan is consistent with APS technical bulletins ANL/APS/TB-7 and TB-20.

 

5.1.3 Photon Shutters

Our optical design uses standard APS designs and placed relative to their respective undualtor beam centerlines so that we are compliant with APS recommendations listed in ANL/APS TB-44.

In the period prior to installation of the Phase II single-crystal monochromator the inboard undulator will be administratively locked in extreme open gap configuration.  In addition we will install a temporary fixed, inclined water-cooled glidcop beam stop immediately downstream to lead collimator 7 in the SOE to block the diffuse fan of radiation from the sector 24 dipole magnet that enters the ID front end.  In addition, this stop will be designed (S. Sharma’s group) to be capable of withstanding the sustained output from the inboard undulator (to deal with the possibility of lapse of  administrative restraints on the inboard undulator gap).  The phase II monochromator will incorporate a fixed water cooled beam stop to block residual beam.

 

5.1.3 Ozone Mitigation.

There are no open-air white beam paths in any NE-CAT optical plan.  In addition, all hutches have two widely-separated ventilation systems that continuously withdraw air from the hutches (see section 3.5 of the hutch specification document in Appendix 5.1).

 

5.1.4 Program-Specific Hazards.

No program-specific hazards are identified at this time.

No special operating requirements have been identified at this time.


5.2 Equipment Protection System.

Table 5.2.1 identifies operational criteria of those build Phase I and II optical components that are routinely or possibly exposed to white-beam radiation that must be monitored to insure safe operation of tabulated components.   All ion pumps have an assicated ion gauge controller.  If the measured pressure at any ion gauge exceeds a preset threshold the appropriate gate valve(s) will be triggered to close.  This closure will in turn trigger closure of the front end valve via EPS logic.

We will use the same general set components used at Sector 8-BM (DirectLogic 405 PLC modules) to construct the sector 24 Equipment Protection System (EPS).  The sector 24 EPS will continuously monitor these criteria and when any corresponding sensor state falls out of band the EPS will automatically signal closure of the  ID front end shutters.    Resetting of equipment conditions that elicit EPS fault trips will be necessary before the EPS fault signal can be cleared.  Only read access to the state of the EPS will be available to beamline control software and offsite operators.

 

Table 5.2.1: EPS Interlocks

Component

Operational Criterion

Sensor

Phase IV Power limiting  Aperture Mask

Water Flow Rate (analog)

Water flow rate > rated minimum flow rate (1 bit)

Proteus 205C24 Flow Sensor

Phase I and II Fixed Aperture Mask

Water Flow Rate (analog)

Water flow rate > rated minimum flow rate (1 bit)

Proteus 205C24 Flow Sensor

FOE Gate Valve 1

Valve in Open Position (1 bit)

Intrinsic

SOE Gate Valve 1

Valve in Open Position (1 bit)

Intrinsic

Phase II Power Limiting Aperture Mask

Water Flow Rate (analog)

Water flow rate > rated minimum flow rate (1 bit)

Proteus 205C24 Flow Sensor

Phase II Single Side Bounce Monochromator

Liquid Nitrogen Flow > rated minimum flow rate (1 bit)

 

Water flow rate > rated minimum flow rate (1 bit)

Intrinsic to Oxford LN2 Cryopump

and

Proteus 205C24 Flow Sensor

Phase II temporary and permanent White Beam Stop

Water Flow Rate (analog)

Water flow rate > rated minimum flow rate  (1 bit)

Proteus 205C24 Flow Sensor

SOE Gate Valve 2

Valve in Open Position (1 bit)

Intrinsic

Phase I Power Limiting Aperture Mask

Water Flow Rate (analog)

Water flow rate > rated minimum flow rate (1 bit)

Proteus 205C24 Flow Sensor

Component

Operational Criterion

Sensor

SOE  Gate Valve 3

Valve in Open Position (1 bit)

Intrinsic

Phase I Kohzu HLD-8-24 Monochromator

Liquid Nitrogen Flow > rated minimum flow rate (1 bit)

 

Water flow rate > (1 bit)rated minimum flow rate (1 bit)

Intrinsic to Oxford LN2 Cryopump

and

Proteus 205C24 Flow Sensor

Phase I P4-50 Integrated Shutter

Water Flow Rate (analog)

Water flow rate > rated minimum flow rate (1 bit)

Proteus 205C24 Flow Sensor

End State Gate Valves

Valve in Open Position (1 bit)

Intrinsic

 

 

5.3 Personnel Safety System (PSS)

5.3.1 Design Scope

The following list establishes the scope of the PSS design effort specific to NE-CAT build phases I and II.  Future expansion of the sector 24 PSSystem will be required prior to commissioning of build phase III (bending magnet) and IV (large offset transmission) beamlines.  No NE-CAT radiation enclosure requires personnel access with beam enabled.

 

                        Enclosure     Enclosure Function           Enclosure Type

24-ID-A           First Optics Enclosure          White Radiation

24-ID-B           Second Optics Enclosure    White Radiation

24-ID-C          (Phase I Experimental          Monochromatic

End Station)

24-ID-E           (Phase II Experimental         Monochromatic

End Station)

 

5.3.2 Components requiring Interlocks

5.3.3 Shutters

The following shutters require interlocks:

            P4-50 located at downstream end of SOE.

            P8 located at midstream of SOE.

            P8 located at downstream end of 24-ID-D (not installed until build phase IV).


5.3.4 Doors & Search Buttons

Figure 5.1 shows a tentative layout for the sector 24 PSS layout, including placements of all doors, search buttons, door override buttons, PSS panels,  warning strobes, enunciators and mirrors for viewing into obscured corners.  This layout was established in consultation with representative of the PSS group.

 

5.3.5 Components requiring administrative control

The drawing of Appendix 1.8 shows placements for all roof and side panel labyrinths.  All labyrinths will require administrative control  Additionally, the coffin lids of the white beam transports will require administrative controls.

Prior to installation of the phase II monochromator administrative controls must be put in place to prevent closure of the inboard undulator gap, except for initial commissioning and front end alignment activities.

 

5.3.6 Radiation Enclosure Action Logic

Except for commissioning activities all sector 24 beamlines operate in one mode only: monochromatic beam delivered to experimental endstations.  The following tables explicitly call out the action logic for sector-24 enclosures.

 


Component Status Þ                 Beamline Actions ß

FE Exit Shutter Open

Station 24-ID-A Secure

Open Front-End Exit Shutter

 

Y

24-ID-A Access

N

 

PSS Logic for 24-ID, Mode 1.  24-ID-A Commissioning operations Only

 

This mode is provided for operations in the FOE (24-ID-A).Component Status Þ     Beamline Actions ß

FE Exit Shutter Open

24-ID-B

P4-50 Shutter Open

Station 24-ID-A Secure

Station 24-ID-B Secure

Station 24-ID-C Secure

Open Front-End Exit Shutter

 

N

Y

Y

I

Open 24-ID-B P4-50 Shutter

I

 

Y

Y

Y

24-ID-A Access

N

I

 

I

I

24-ID-B Access

N

I

I

 

I

24-ID-C Access

I

N

I

I

 

PSS Logic for 24-ID, Mode 2.  Commissioning/Operations in 24-ID-B  and 24-ID-CThis mode is provided for operations in 24-ID-B and 24-ID-C before any downstream side-, optics-, or optics- stations exist.

 

Component Status Þ                 Beamline Actions ß

FE Exit Shutter Open

24-ID-B

P4-50 Shutter Open

24-ID-A

P-8

Shutter Open

24-ID-B

P-8 Shutter Open

Station 24-ID-A Secure

Station 24-ID-B Secure

Station 24-ID-C Secure

Station 24-ID-D Secure

Open Front-End Exit Shutter

 

N

N

N

Y

Y

I

I

Open 24-ID-C P4-50 Shutter

I

 

I

I

Y

Y

Y

I

Open 24-ID-D P-8 Shutter

I

I

 

I

Y

Y

I

Y

Open 24-ID-E P-8 Shutter

I

I

I

 

Y

Y

I

I

24-ID-A Access

N

I

I

I

 

I

I

I

24-ID-B Access

N

I

I

I

I

 

I

I

24-ID-C Access

I

N

I

I

I

I

 

I

24-ID-D Access

I

I

N

I

I

I

I

I

PSS Logic for 24-ID, Mode 3.  Normal  Commissioning/Operations in 24-ID-C,  24-ID-D This mode is provided for operations in 24-ID-C and 24-ID-D when downstream side-, optics-, or optics-stations exist; before 24-ID-E PSS system exists.

 

Component Status Þ                 Beamline Actions ß

FE Exit Shutter Open

24-ID-B

P4-50 Shutter Open

24-ID-A

P-8

 Shutter Open

24-ID-B

P-8

Shutter Open

Station 24-ID-A Secure

Station 24-ID-B Secure

Station 24-ID-C Secure

Station 24-ID-D Secure

Station 24-ID-E Secure

Open Front-End Exit Shutter

 

N

N

N

Y

Y

I

I

I

Open 24-ID-B P4-50 Shutter

I

 

I

I

Y

Y

Y

I

I

Open 24-ID-A P-8 Shutter

I

I

 

I

Y

Y

I

Y

I

Open 24-ID-B P-8 Shutter

I

I

I

 

Y

Y

I

I

Y

24-ID-A Access

N

I

I

I

 

I

I

I

I

24-ID-B Access

N

I

I

I

I

 

I

I

I

24-ID-C Access

I

N

I

I

I

I

 

I

I

24-ID-D Access

I

I

N

I

I

I

I

I

I

24-ID-E Access

I

I

I

N

I

I

I

I

 

PSS Logic for 24-ID, Mode 4.  Normal  Commissioning/Operations in 24-ID-C,  24-ID-D and 24-ID-E  This mode is provided for operations in 24-ID-D and 24-ID-E when downstream side-, optics-, or optics-stations exist.

 

PSS Subsystem Requirements Þ                 —(to grant)—                 User Request ß

FE Exit Shutter Open

Station 8-BM-A Secure

Open Front-End Exit Shutter

 

Y

24-BM-A Access

N

 

PSS Logic for 24-BM, Mode 1.  Beam into Station 24-BM-A.  This mode is provided for experiments/commissioning in the BM FOE (24-BM-A).

 

Symbol Legend

Y

(Yes)

The requirement at the column head must be satisfied before granting the request.

N

(No)

The requirement at the column head must not be satisfied before granting the request.

I

(Ignore)

The requirement is not applicable to this request.

 

 



6. Work Breakdown Structure

This section presents in tabular form what we believe to be a credible work breakdown structure for NE-CAT build phases I and II.

 

6.1 Cost Estimates

The following cost estimates are based upon competitive vendor-solicidted quotations and/or designs presented herein.  The overall cost structure and individual procuremetns are consistent with funds available for the NE-CAT construction project.

 

WBS

 

 

 

 

 

 

Subtotal

Total

1.1.1

PHASE I-INSERTION DEVICE BEAMLINE

 

5666

 

 

 

 

 

1.1.1.1

SHIELDING AND PSS SYSTEMS

1205

 

1.1.1.2

OPTICS SYSTEMS

1254

 

1.1.1.3

BEAM TRANSPORT SYSTEMS

451

 

1.1.1.4

UTILITY SYSTEMS

335

 

1.1.1.5

EXPERIMENT SYSTEMS

1966

 

1.1.1.6

CONTROL SYSTEMS

455

 

 

 

 

 

 

1.1.2

PHASE II- INSERTION DEVICE SIDE STATION

 

2890

 

 

 

 

 

1.1.2.1

SHIELDING AND PSS SYSTEMS

376

 

1.1.2.2

OPTICS SYSTEMS

727

 

1.1.2.3

BEAM TRANSPORT SYSTEMS

45

 

1.1.2.4

UTILITY SYSTEMS

40

 

1.1.2.5

EXPERIMENT SYSTEMS

1377

 

1.1.2.6

CONTROL SYSTEMS

325

 

 

 

 

 

 

1.2

LABORATORY OFFICE MODULE

 

137

1.3

PERSONNEL MATERIAL AND SERVICES

 

3115

1.4

UNDULATORS AND FRONT ENDS

 

1975

 

 

 

 

 

 

PHASE I and II TOTAL

 

13783

 


6.2 Work Breakdown Structure

The following table constitutes a detailed work breakdown structure for NE-CAT build phases I and II at the component level.

 

WBS

 

 

 

 

 

1

PHASES I, II, III, & IV

1.1

TECHNICAL FACILITIES

1.1.1

PHASE I-INSERTION DEVICE BEAMLINE

1.1.1.1

SHIELDING AND PSS SYSTEMS

1.1.1.1.1

 

SHIELDING

.1

 

     COLLIMATORS

.2

 

     BEAM STOP

.3

 

     24-ID-A ENCLOSURE

.4

 

     WHITE BEAM TRANSPORT

.5

 

     24-ID-B ENCLOSURE

.6

 

     24-ID-C ENCLOSURE

1.1.1.1.2

 

EQUIPMENT PROTECTION SYSTEM

1.1.1.1.3

 

PERSONNEL SAFETY SYSTEM

1.1.1.1.4

 

OXYGEN DEFICIENCY MONITORS

1.1.1.2

OPTICS SYSTEMS

1.1.1.2.1

 

POWER LIMITING APERTURES -2

1.1.1.2.2

 

MONOCHROMATOR

.1

 

     MONOCHROMATOR

.2

 

     CRYSTALS AND STAGES

.3

 

     CRYO-PUMP

.4

 

     NESLAB

1.1.1.2.3

 

 FOCUSSING MIRROR

.1

 

     POSITIONING MECHANISM

.2

 

     MIRROR SUBSTRATE

.3

 

     VACUUM SYSTEM

1.1.1.2.4

 

INTEGRAL SHUTTER ASSEMBLY

1.1.1.2.5

 

SLITS

1.1.1.2.6

 

WINDOW

1.1.1.2.7

 

BEAM POSITION MONITORS

1.1.1.3

BEAM TRANSPORT SYSTEMS

1.1.1.3.1

 

SUPPORT STRUCTURES

.1

 

     VACUUM PIPE SUPPORTS

.2

 

     PUMP SUPPORTS

.3

 

    SUPPORT TABLES - 4

1.1.1.3.2

 

VACUUM SYSTEMS

.1

 

     GAUGES

.2

 

     ION PUMPS

.3

 

     TURBO PUMPS

.4

 

     SCROLL PUMPS

.5

 

     VALVES

.6

 

     VACUUM HARDWARE

.7

 

     BELLOWS

.8

 

     MASS SPECTROMETER

1.1.1.4

UTILITY SYSTEMS

1.1.1.4.1

 

ELECTRICAL

.1

 

     SIGNAL CABLES

1.1.1.4.2

 

WATER

.1

 

     DI-IONIZED WATER

.2

 

     CHILLED WATER

1.1.1.4.3

 

HVAC

1.1.1.4.4

 

COMPRESSED AIR

1.1.1.4.5

 

LIQUID NITROGEN DELIVERY

1.1.1.4.6

 

ROUGH VACUUM

1.1.1.5

ID-C EXPERIMENT SYSTEMS

1.1.1.5.1

 

GONIOMETER

.1

 

     OMEGA STAGE

.2

 

     KAPPA STAGE

.3

 

     GUARD SLITS

.4

 

     COLLIMATORS

.5

 

     BEAM STOP

.6

 

     SHUTTER AND FILTERS

.7

 

     SCINTILLATION DETECTOR

.8

 

     ALIGNMENT CAMERAS

.9

 

     FLOURESCENCE DETECTOR

1.1.1.5.2

 

DETECTORS

.1

 

     ID ENDSTATION DETECTOR

.2

 

     DETECTOR SUPPORT STAGE

.3

 

     ION CHAMBERS

1.1.1.5.3

 

COMPUTER NETWORKING

1.1.1.5.4

 

DATA ACQUISITION/ARCHIEVING

.1

 

     SOFTWARE

.2

 

     HARDWARE(COMPUTERS+STORAGE)

1.1.1.5.5

 

SUPPORT EQUIPMENT

.1

 

     CRYOJET

.2

 

     GAS DELIVERY

.4

 

    TOOLS

.5

 

    FURNITURE

.6

 

     MISCELLANEOUS-INTEGRATION

1.1.1.6

24-ID-C CONTROL SYSTEMS

1.1.1.6.1

 

OPEN

1.1.1.6.2

 

CONTROL SOFTWARE

1.1.1.6.3

 

BEAMLINE COMPUTERS& HARDWARE

1.1.1.6.4

 

MOTORS & CONTROLLERS

1.1.1.6.5

 

EQUIPMENT RACKS

1.1.1.6.6

 

CONTROL HARDWARE

1.1.1.6.7

 

NIM HARDWARE

1.1.1.6.8

 

CABLING

1.1.1.6.9

 

UPS

 

 

 

1.1.2

PHASE II- INSERTION DEVICE SIDE STATION ID-E

 

 

 

1.1.2.1

SHIELDING AND PSS SYSTEMS

1.1.2.1.1

 

24-ID-E SHIELDING

.1

 

     COLLIMATORS

.2

 

     BEAM STOP

.3

 

     ID-E ENCLOSURE

1.1.2.1.2

 

EQUIPMENT PROTECTION SYSTEM

1.1.2.1.3

 

PERSONNEL SAFETY SYSTEM

1.1.2.2

OPTICS SYSTEMS

1.1.2.2.1

 

POWER LIMING APERTURE +FIXED APERT

1.1.2.2.2

 

MONOCHROMATOR HORIZONTAL.

.1

 

     MONOCHROMATOR

.2

 

     CRYSTALS AND STAGES

.3

 

CRYO-COOLER

.4

 

NESLAB

1.1.2.2.3

 

24-ID-E FOCUSSING MIRROR

.1

 

     POSITIONING MECHANISM

.2

 

      MIRROR SUBSTRATE

.3

 

     VACUUM SYSTEM

1.1.2.2.4

 

PHOTON SHUTTERS

.1

 

     WHITE BEAM SHUTTER

.2

 

     PHOTON SHUTTERS

1.1.2.2.5

 

SLITS

1.1.2.2.6

 

WINDOW

1.1.2.2.7

 

BEAM POSITION MONITORS