Sept.2001 Shanghai symposium D.T. Jiang Acknowledgements Deming Shu, APS Tom Rebedeue, SSRL

Sept.2001 Shanghai symposiumD.T. Jiang

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• Bremsstrahlung Ray Tracing• Current Design Issues• Summary


CLS Top View


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/ (rad) (CLS 1/= 176 rad) 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


Superconducting Wiggler Brilliance

1016

2

3

4

567

1017

Phot

/s/0

.1%

bw/m

m2 /m

r2

100 eV2 3 4 5 6 7 8

1keV2 3 4 5 6 7 8

10keV2 3 4 5 6 7 8

100keVPhoton Energy

Period = 33 mm, B = 1.9 T, K = 5.91,

Length ~1.2 m


Superconduction WigglerHeat Flux at the 1st FE Fixed Mask

-3

-2

-1

0

1

2

3

mm

-10 -5 0 5 10mm

530 510 490 470 450

430

410 390

370 350 330

310 290 270

250

230

210 190

170 150

130

110

90

70

50

30 10


SGU Heat Flux Density Map @ FM-1

-2

-1

0

1

2

mm

3210-1-2-3mm

650

630 610 590 550

530 510

490

470

450

430

410 390 370

350 330 310

290

270

250

230

210 190

170 150

130

110

90 70

50

30 10

Max heat flux density 702 W/mm2

This is calculated for a second CLS Small Gap Undulator at thedown stream location in a chicaned Two-SGU/Straight.


Thermal Power Loads

CLS IDsPtotal

(kW)W/mm2

@FM1W/mm2

@FM2W/mm2

@PSH-1W/mm2

@FM3W/mm2

@PSH-2W/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

BM10.070 /H-

mrad29 14 12 6 6 -


Reference APS FE Specifications 1) 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)

3) 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)


Schematic of CLS Two-ID/Straight FE


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


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


FE Angular throughput required for phase I CLS beamlines

FE Identifier Source/BL IdentifierVertical (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


Dipole Chamber Virtual Aperture for Miss-steered ID SR Rays

This neck acts a virtualaperture that limits theallowed miss-steeringsize along the straight.

1156.4 mm to straight center

chamber neck


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



SR Ray Tracing of Two-ID/Straight FE: horizontal

Example:SGM/PGMSector


SR Horizontal trace detail


Bremsstrahlung Ray Tracing for Two-ID/Straight FE: vertical

1st Collimator thickness determined by EGS4 calculation.


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


Layout of Single ID/Straight FE: plan view


Layout of Single ID/Straight FE: side view


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


Bending Magnet FE (BM1): plan view


Bending Magnet FE (BM1): elevation view


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.

Documents

Sept.2001 Shanghai symposium D.T. Jiang Acknowledgements Deming Shu, APS Tom Rebedeue, SSRL