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Acknowledgements

Acknowledgements. Deming Shu, APS Tom Rebedeue, SSRL. Canadian Light Source Front Ends. D.T. Jiang and E. Hallin, CLS, Saskatoon, Canada Outline Generic Specs of CLS Front Ends Type of SR Sources SR Thermal Power Loads FE Layouts: Two-ID/Straight, One-ID/Straight, BM SR Ray Tracing

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Acknowledgements

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  1. Acknowledgements Deming Shu, APS Tom Rebedeue, SSRL

  2. Canadian Light Source Front Ends • D.T. Jiang and E. Hallin, CLS, Saskatoon, Canada • Outline • Generic Specs of CLS Front Ends • Type of SR Sources • SR Thermal Power Loads • FE Layouts: Two-ID/Straight, One-ID/Straight, BM • SR Ray Tracing • Bremsstrahlung Ray Tracing • Current Design Issues • Summary

  3. CLS Top View

  4. 45mm-U (SGM) 185mm-U (PGM) 75mm-EPU (SPM) 22mm-SGU (PX) WSup33 (Sup-conduct) Period length (cm) 4.5 18.5 7.5 2.2 3.3 Device length (m) 1.189 1.760 1.60 1.610 1.221 Number of periods 26 9 21 74 37 Max. magnetic field B0(T) 0.843 0.751 0.747 0.912 1.917 Critical Ec (keV) - - - - 10.727 Max. deflection parameter, K 3.54 13.0 5.23 1.87 5.91 K/g (mrad) (CLS 1/g = 176 mrad) 623 2291 922 330 1040 Total Power (kW) 2.21 2.51 2.34 3.60 11.95 Peak Power (kW/mrad2) 8.4 2.6 6.0 25.3 27.2 ID-photon shutter distance (m) 10.94 8.785 10.00 8.21* 10.00 Peak heat flux @ shutter (W/mm2) 70 34 60 484 272 Summary of Design Parameters for CLS Insertion Devices

  5. Superconducting Wiggler Brilliance Period = 33 mm, B = 1.9 T, K = 5.91, Length ~1.2 m

  6. Superconduction WigglerHeat Flux at the 1st FE Fixed Mask

  7. SGU Heat Flux Density Map @ FM-1 Max heat flux density 702 W/mm2 This is calculated for a second CLS Small Gap Undulator at the down stream location in a chicaned Two-SGU/Straight.

  8. CLS IDs Ptotal (kW) W/mm2 @FM1 W/mm2 @FM2 W/mm2 @PSH-1 W/mm2 @FM3 W/mm2 @PSH-2 W/mm2 @FM4 33mm1.9T Wiggler (XAFS) 11.73 536 345 - - 273 162 22mm-SGU (PX) 3.60 702 593 466 350 270 176 45mm-U (SGM) & 185mm-U (PGM) 4.72 213 136 - - 108 64 75mm-EPU x 2 4.68 258 162 - - 127 74 BM1 0.070 /H-mrad 29 14 12 6 6 - Thermal Power Loads

  9. Reference APS FE Specifications • APS Undulator A @ 1st fixed mask Ptotal = 6.0 kW, Pdensity=559 W/mm2 . • D. Shu et. al. Nucl. Instrum. & Methods, A 347, 584-590(1994) • 2) APS FE V1.2 would accommodate the total power (>~6 kW) and power density load of 600 W/mm2. • D. Shu et. al. (preprint) • In APS FE V1.5, Ptotal = 9 kW and Pdensity=800 W/mm2, a design targeting at thermal load capacity of 12 kW total power with 1.2 kW/mm2 maximum power density (4.8-meter-long double undulator A with APS operating at 100 mA). • D. Shu et. al. (unpublished)

  10. Schematic of CLS Two-ID/Straight FE

  11. Layout of CLS Two-ID/Straight FE: plan view

  12. Layout of CLS Two-ID/Straight FE: side view

  13. FE Identifier Source/BL Identifier Vertical (mrad) Horizontal (mrad) Duplex ID FE (11ID) 185mm-U (11ID.2, VLS PGM) 0.7 0.7 45mm-U (11ID.1, SGM) 0.140 0.360 Duplex ID FE (10ID) 75mm-EPU (10ID.1 Spectromicroscopy) 0.20 0.20 75mm-EPU (10ID.2, NOT TO BE IMPLEMENTED INNITIALLY) Assumed same as above Assumed same as above Single ID FE (08ID) 22mm-SGU (08ID.1, Protein crystallgraphy) 0.060 0.120 Sing ID FE (07ID) 35mm-Wiggler (XAFS) 0.24 1.60 BM FE (BM1) BM1 0.6 2.0 FE Angular throughput required for phase I CLS beamlines

  14. Dipole Chamber Virtual Aperture for Miss-steered ID SR Rays 1156.4 mm to straight center This neck acts a virtual aperture that limits the allowed miss-steering size along the straight. chamber neck

  15. SR Ray Tracing of Two-ID/Straight FE: vertical

  16. SR Ray Tracing of Two-ID/Straight FE: horizontal Example: SGM/PGM Sector

  17. SR Horizontal trace detail

  18. Bremsstrahlung Ray Tracing for Two-ID/Straight FE: vertical 1st Collimator thickness determined by EGS4 calculation.

  19. Bremsstrahlung Ray Tracing for Two-ID/Straight FE:horizontal

  20. Layout of Single ID/Straight FE: plan view

  21. Layout of Single ID/Straight FE: side view

  22. Shutter:moving box-type mask (D.Shu et al,APS)

  23. Bending Magnet FE (BM1): plan view

  24. Bending Magnet FE (BM1): elevation view

  25. Status of CLS BL FE Construction • Conceptual Designs are completed. The designs are compact, simpler and with the same thermal power load capacity compared to the template APS FE design. • Detail engineering design is in progress (mainly • FEA Analysis confirmation for the results • Extrapolated from the parametric studies of the • APS FE designs). • Tendering process is scheduled to start by the end of 2001.

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