Insertion Devices Toshi Tanabe Insertion Device Group Leader

Insertion Devices Toshi Tanabe Insertion Device Group Leader Accelerator System Advisory Committee October 14 -15, 2010 1 BROOKHAVEN SCIENCE

Outline • • • Changes / Progress since last ASAC review ID Table / Official Schedule Progress on Each Device R & D (Pr. Fe. B, IVMMS, AGU, VST) FY 11 Goals and Milestones Conclusions Acknowledgement: ID group members: C. Kitegi, J. Rank, D. A. Harder, T. Corwin, V. Ruchinsky, G. Rakowsky Part-time members: O. Chubar, C. Spataro, P. He, F. Huston Accelerator Physics: J. Bengtsson, S. Krinsky, A. Blednykh, L. H. Yu Vacuum Group: Dick Hseuh Mechanical Group: V. Ravindranath 2 BROOKHAVEN SCIENCE

Progress since ASAC 09 • New Hires • One Mechanical Technician (T 6): Todd Corwin, hired on December 2009 • One Assistant Scientist (S 1): Charles Kitegi, hired on July 2010 • One Electrical Engineer (P 5): Vlad Ruchinsky, hired on March 2010 • 2 ME and 1 Sci positions are open now (thanks to NIH funding) • Technical Status of Systems • PM Damping Wiggler (DW) Vendor selected by the panel. Waiting for DOE approval. • In-Vacuum Undulator (IVU) Preliminary mechanical design completed. • Elliptically Polarized Undulator (EPU) RFP is to be issued. • Three Pole Wiggler (3 PW) RFP has been issued (deadline for proposal: Nov. 8) • Magnet Development Laboratory (Insertion Device Magnet Measurement Facility) – Hall probe bench has been completed and waiting for installation. – Environmental enclosure almost 3 complete (estimated completion on SCIENCE BROOKHAVEN October

Changes since ASAC 09 • Damping Wiggler Parameters (90 mm period/12. 5 mm gap 100 mm/15 mm) have changed due to the concern of excessive heating of vacuum chamber by misplace beam. • PCR_10_140 approved to change “In Vacuum Magnetic Measurement System” from in-house development to a large procurement • PCR_10_124 approved to add “Evolution of In. Vacuum Undulators for IXS (IVU-22)” 4 BROOKHAVEN SCIENCE

NSLS-II Insertion Devices (Final Specs) 5 BROOKHAVEN SCIENCE

Recent ID Review (9/14 -15, 2010) Recommendations • • Revisit misalignment tolerances task force established Impedance calculations for IVUs accelerator physics group Include magnetic performance requirement for larger gaps than operating gap for DW change order after the contract Cost analysis and performance justification for BNL reference design with CPMU upgradability Reallocate engineering assets from IVU to EPU RFP is ready Option for multiple production for 3 PW contract or obtain design right include the option with currently prepared RFP Detailed interface specifications for ID controls 6 BROOKHAVEN SCIENCE

DW-Magnet Temperature Rise Peak temperature ~ 45 °C Max Temperature of Magnets in steady state ~45°C 7 BROOKHAVEN SCIENCE

DW Reference Design by Radia • lw=100 mm with side magnets g = 2. 80 mrad) (Br=1. 28 T, gap=15. 0 mm, Keff / • Integral of By 2 on-axis for one period in longitudinal direction 0. 1586 T 2. m • Effective K 18. 2 • DA for 90 mm wide pole (J. Beng 8 BROOKHAVEN SCIENCE

DW Straight Section Lay-out 9 BROOKHAVEN SCIENCE

DW Magnet Array Specifications 10 BROOKHAVEN SCIENCE

EU 49 (Reference-Design) Parameters Termination Magnet Thicknesses and Spaces: Undulator Parameters: Br = 1. 25 (Nd. Fe. B) Main Magnet Dimensions: 34 mm (H) x 34 mm (V) x 12. 25 mm (L) Longitudinal “Air-Gap” between Main Magnets: 50 μm Horizontal Gap between Magnet Arrays: 1 mm Period: 49. 2 mm Number of Full Periods: 38 Length: ~1930 mm (without “Magic Fingers”, ~1960 mm with “MF”) Suggested Modular Minimal Gap: 11. 5 mm MT 1 M 3 M 5 A B A D 1 CD 2 Structure ΔD 1 = 8. 15 mm ΔD 1 -C = 4. 47 mm ΔC = 6. 11 mm ΔC-D 2 = 0. 65 mm ΔD 2 = 3. 82 mm M 3 Ex. Estimated Residual Field MT 2 M 5 M 3 M 5 Integrals (40 periods without Correction Coils) M 3 A D 2 CD 1 BA B A B AD 1 CD 2 Vertical First Field Integral Shift = λu/2 Shift = λu/4 (parallel) Shift = λu/4 (anti-parallel) Shift = 0 1 st Field Integral [G. cm] M 3 - 3 magnet module (A+B+A) M 3 M 5 - 5 magnet module (B+A+B) + M 5 = 2 periods Horizontal First Field Integral Shift = λu/4 (anti-parallel) Gap [mm] 11 BROOKHAVEN SCIENCE

EPU Straight Section Lay-out 12 BROOKHAVEN SCIENCE

EPU Magnet Array Specifications 13 BROOKHAVEN SCIENCE

In-Vacuum Undulator • • X 25 -MGU based IVU lu=20 mm, Minimum Gap=5. 0 mm, 3 m Long Baseline Design Uses Conservative Nd. Fe. B (Br=1. 12 T, Hcj=30 k. Oe) Radia Model NSLS MGU-X 25 Opera 3 D Model Demag. Analysis 14 BROOKHAVEN SCIENCE

SRX-IVU Orthogonal Views 15 BROOKHAVEN SCIENCE

Gap Drive Structure Assembly Section A-A End View Front View 16 BROOKHAVEN SCIENCE

Magnet Core Assembly and Cross Sections Bi-metal Transition Flange Crossover Coupler Cooling Platen Coolant Channel Magnet Array Ass’y Return Outlet Coolant Channel Cross Flow Supply Inlet Cross Flow UHV Thermometry Distribution C L Current Mt’l Spec: EB-Welded 2219 -T 87 Aluminum Platen, 5082 Aluminum Magnet Array R&D Mt’l Spec: OFHC Copper Platen (anneal to 20 -30% Syp) , 316 L Stainless Magnet Array 17 BROOKHAVEN SCIENCE

Three Pole Wiggler (3 PW) • Requirements: • • More than 2 mrad of radiation fan above 1 T field Use a special inconel (25 mm outer vertical) chamber Fixed gap and removable from one side of the chamber Simple and economical • Magnetic Design (Central Pole Gap=28 mm) • Br=1. 25 T • Permendur Center Pole • Soft Iron (1006) Side Poles • Rectangular Magnets Main Magnets: 120 x 41. x 90 mm Center Pole: 120 x 23 x 65 mm End Poles: 101. x 45 x 86 mm Radia Model 18 Tosca Model BROOKHAVEN SCIENCE

3 PW-Vendor Interface Control Drawing 19 BROOKHAVEN SCIENCE

DW, EPU and 3 PW Schedules 20 BROOKHAVEN SCIENCE

IVU (Standard & SRX) Schedules 21 BROOKHAVEN SCIENCE

List of “Off-baseline” Devices • • • IVUs for NIH Funded Beam Lines (funded) • 2 Canted IVUs in a short straight section similar to SRX • One standard U 20 • Another device to be specified NEXT-MIE Devices (near term: details unknown yet) • Several standard IVUs (expected) • SCW (4. 5 T ~ 6 T) • Long Period EPU? Type-II Beamlines NEXT-II Nxt. Gen Biological and Environmental Research (BER) 22 BROOKHAVEN SCIENCE

New Technology (Off-baseline) • Adaptive Gap Undulator • • Different period length / gap depending on the magnet position in Z • Various issues such as impedance effect by the steps and (Pr. Fe. B) CPMUkick compensation in each joint section, etc. remain to be solved. • Proto-type test shows 19% increase of Br from RT to 77 K • 17 mm period, Br (@77 K)=1. 5 T, 2. 6 m long • Bakeable magnets may be produced. • SCU • 14 mm period, B=1. 68 T, 2 m long • APC Nb. Ti wire is now available • Both LTS/HTS version will be investigated. 23 BROOKHAVEN SCIENCE

FY 11 Goals and Milestones • • DW Contract award (November 4 th ) • EPU Contract to be awarded (Est. 2 nd week of December) • Completion of ID-Magnetic Measurement Facility (to be completed in Dec 2010: on track) • SRX-IVU 21 Contract to be awarded (January 2011: on track) • IVU 20 Contract to be awarded (May 2011: on track) 3 PW Contract to be awarded (Est. 3 rd week of November) 24 BROOKHAVEN SCIENCE

Summary • • Damping Wigglers • A vendor has been selected and details of the contract is negotiated. 3 PW & EPU • RFP has been issued. • • • IVU • Reference mechanical design is completed by BNL for SRX-IVU • Impedance optimization with the design of the transition region design is still required. • IXS-IVU 22 requires special design for long straight installation ID-MMF • Enviromental enclosure will be completed on October 18 th, 2010 as planned. • Hall probe bench, Helmholz coil, Calibration Dipole will be installed by the end of December R&D and Future Devices • IVMMS proposals have been received by two vendors. • Pr. Fe. B based CPMU R&D is being carried out. • Design work for AGU has just started. 25 BROOKHAVEN SCIENCE

Back-up Slides 26 BROOKHAVEN SCIENCE

ASAC 09 Report 27 BROOKHAVEN SCIENCE

MGU-X 25 Cooling Circuit 28 BROOKHAVEN SCIENCE

1 m OFHC Platen Proto-type • Integrated cooling channel closed by the friction stir welding technique 29 BROOKHAVEN SCIENCE

AGU Example for IXS Beam Line Single-Electron Spectral Intensity at ~9. 1 ke. V (on axis) Magnetic Field IVU 22 λu = 22 mm K ≈ 1. 5 G ≈ 7 mm λu≈ 22. 87 mm 20. 98 mm 19. 74 mm K ≈ 1. 45 1. 57 1. 66 G ≈ 7. 74 mm 6. 23 mm 5. 32 mm λu≈ 22. 54 mm 20. 24 mm 19. 64 mm 21. 26 mm K ≈ 1. 47 1. 62 1. 66 1. 55 G ≈ 7. 46 mm 6. 45 mm 5. 68 mm 5. 25 mm λu≈ 22. 87 mm K ≈ 1. 45 G ≈ 7. 74 mm Spectral Flux through 100 μrad (H) x 50 μrad (V) Aperture 19. 59 mm 1. 67 5. 21 mm High-β Straight I = 0. 5 A 30 • O. Chubar BROOKHAVEN SCIENCE

Pr. Fe. B Magnet 77 K Measurement • Pr. Fe. B (53 CR v 2 magnet) Magnet Arrays • Cut from a large piece M vector uniformity is poor Sorted by signature method • Period Length = 14. 5 mm, Gap=4. 85 mm • RT measurement on granite Hall probe bench (Gap=4. 85 mm) for the reference • RT & LN 2 (77 K) measurement on VTF • Increase of ~19 % in B 31 BROOKHAVEN SCIENCE

2 m SCU-Field measurement setup (courtesy of A. Grau of KIT) Measurement setup parts under construction Local field measurements via Hall samples on a sledge Position (z-direction) measurement with laser interferometer Zero Gauss chamber for zero check of Hall sample calibration (possible after every thermal cycle) possibly in addition 2 Helmholtz coils for linearity check of Hall sample calibration (not shown) Integral field measurements with stretched wire technique (Cu. Be wire Ø 125µm) Position adjustment for stretched wire in x-y-direction via linear stages with encoders 32 BROOKHAVEN SCIENCE

Tunnel Cross Section of a Short Straight Section 33 BROOKHAVEN SCIENCE

Tunnel Cross Section of a Long Straight Section 1330. 82 mm (Minimum) 34 BROOKHAVEN SCIENCE