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

2 BROOKHAVEN SCIENCE ASSOCIATES Outline Changes / Progress since last ASAC review ID Table / Official Schedule Progress on Each Device R & D (PrFeB, IVMMS, AGU, VST) FY11 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

3 BROOKHAVEN SCIENCE ASSOCIATES Progress since ASAC09 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 (3PW)  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 complete (estimated completion on October 28, 2010) New Hires One Mechanical Technician (T6): Todd Corwin, hired on December 2009 One Assistant Scientist (S1): Charles Kitegi, hired on July 2010 One Electrical Engineer (P5): Vlad Ruchinsky, hired on March ME and 1 Sci positions are open now (thanks to NIH funding)

4 BROOKHAVEN SCIENCE ASSOCIATES Changes since ASAC09 Damping Wiggler Parameters (90mm period/12.5mm gap  100mm/15mm) 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)”

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

6 BROOKHAVEN SCIENCE ASSOCIATES 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 3PW contract or obtain design right  include the option with currently prepared RFP Detailed interface specifications for ID controls  controls group Clarify the long term objectives of the ID group

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

8 BROOKHAVEN SCIENCE ASSOCIATES DW Reference Design by Radia w =100mm with side magnets (Br=1.28T, gap=15.0mm, K eff /  = 2.80 mrad) Integral of B y 2 on-axis for one period in longitudinal direction T 2.m Effective K 18.2 DA for 90mm wide pole (J.Bengtsson)

9 BROOKHAVEN SCIENCE ASSOCIATES DW Straight Section Lay-out

10 BROOKHAVEN SCIENCE ASSOCIATES DW Magnet Array Specifications

11 BROOKHAVEN SCIENCE ASSOCIATES Ex. Estimated Residual Field Integrals (40 periods without Correction Coils) Undulator Parameters: Br = 1.25 (NdFeB) Main Magnet Dimensions: 34 mm (H) x 34 mm (V) x 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”) Minimal Gap: 11.5 mm AB D1 C D2 A : Termination Magnet Thicknesses and Spaces: Δ D1 = 8.15 mm Δ D1-C = 4.47 mm Δ C = 6.11 mm Δ C-D2 = 0.65 mm Δ D2 = 3.82 mm D1 A C D2 MT1 MT2 M3M5 M3M5 M3M5 M3 M5 M3 M5 M3 M5 C D2 B A A D1 B A B AB Suggested Modular Structure Vertical First Field Integral Gap [mm] 1 st Field Integral [G.cm] Shift = 0 Shift = λ u /2 Shift = λ u /4 (parallel) Shift = λ u /4 (anti-parallel) Gap [mm] 1 st Field Integral [G.cm] Horizontal First Field Integral Shift = λ u /4 (anti-parallel) EU49 (Reference-Design) Parameters M3 - 3 magnet module (A+B+A) M5 - 5 magnet module (B+A+B+A+B) M3 + M5 = 2 periods

12 BROOKHAVEN SCIENCE ASSOCIATES EPU Straight Section Lay-out

13 BROOKHAVEN SCIENCE ASSOCIATES EPU Magnet Array Specifications

14 BROOKHAVEN SCIENCE ASSOCIATES In-Vacuum Undulator X25-MGU based IVU  u =20mm, Minimum Gap=5.0mm, 3m Long Baseline Design Uses Conservative NdFeB (Br=1.12T, Hcj=30kOe) NSLS MGU-X25 Radia Model Demag. Analysis Opera 3D Model

15 BROOKHAVEN SCIENCE ASSOCIATES SRX-IVU Orthogonal Views

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

17 BROOKHAVEN SCIENCE ASSOCIATES Magnet Core Assembly and Cross Sections Crossover Coupler Current Mt’l Spec: EB-Welded 2219-T87 Aluminum Platen, 5082 Aluminum Magnet Array R&D Mt’l Spec: OFHC Copper Platen (anneal to 20-30% Syp), 316L Stainless Magnet Array Magnet Array Ass’y Cooling Platen Bi-metal Transition Flange C L Coolant Channel Supply Inlet Cross Flow Return Outlet Coolant Channel Cross Flow UHV Thermometry Distribution

18 BROOKHAVEN SCIENCE ASSOCIATES Three Pole Wiggler (3PW) Br=1.25T 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 Requirements: More than 2 mrad of radiation fan above 1T 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=28mm) Radia Model Tosca Model

19 BROOKHAVEN SCIENCE ASSOCIATES 3PW-Vendor Interface Control Drawing

20 BROOKHAVEN SCIENCE ASSOCIATES DW, EPU and 3PW Schedules

21 BROOKHAVEN SCIENCE ASSOCIATES IVU (Standard & SRX) Schedules

22 BROOKHAVEN SCIENCE ASSOCIATES List of “Off-baseline” Devices NEXT-MIE Devices (near term: details unknown yet) Several standard IVUs (expected) SCW (4.5T ~ 6T) Long Period EPU? IVUs for NIH Funded Beam Lines (funded) 2 Canted IVUs in a short straight section similar to SRX One standard U20 Another device to be specified Type-II Beamlines NEXT-II NxtGen Biological and Environmental Research ( BER)

23 BROOKHAVEN SCIENCE ASSOCIATES New Technology (Off-baseline) SCU 14mm period, B=1.68T, 2m long APC NbTi wire is now available Both LTS/HTS version will be investigated. CPMU (PrFeB) Proto-type test shows 19% increase of Br from RT to 77K 17mm period, Br 2.6m long Bakeable magnets may be produced. Adaptive Gap Undulator Different period length / gap depending on the magnet position in Z Various issues such as impedance effect by the steps and kick compensation in each joint section, etc. remain to be solved.

24 BROOKHAVEN SCIENCE ASSOCIATES FY11 Goals and Milestones DW Contract award (November 4 th ) 3PW Contract to be awarded (Est. 3 rd week of November) 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-IVU21 Contract to be awarded (January 2011: on track) IVU20 Contract to be awarded (May 2011: on track) IXS-IVU22 Contract to be awarded (Est. June 2011)

25 BROOKHAVEN SCIENCE ASSOCIATES Summary 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-IVU22 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 Damping Wigglers A vendor has been selected and details of the contract is negotiated. 3PW & EPU RFP has been issued. R&D and Future Devices IVMMS proposals have been received by two vendors. PrFeB based CPMU R&D is being carried out. Design work for AGU has just started.

26 BROOKHAVEN SCIENCE ASSOCIATES Back-up Slides

27 BROOKHAVEN SCIENCE ASSOCIATES ASAC09 Report

28 BROOKHAVEN SCIENCE ASSOCIATES MGU-X25 Cooling Circuit

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

30 BROOKHAVEN SCIENCE ASSOCIATES λ u ≈ mm K ≈ 1.45 G ≈ 7.74 mm mm mm λ u ≈ mm K ≈ 1.47 G ≈ 7.46 mm mm mm mm mm mm mm λ u ≈ mm K ≈ 1.45 G ≈ 7.74 mm mm mm mm mm λ u = 22 mm K ≈ 1.5 G ≈ 7 mm Magnetic Field IVU22 Single-Electron Spectral Intensity at ~9.1 keV (on axis) High-β Straight I = 0.5 A Spectral Flux through 100 μrad (H) x 50 μrad (V) Aperture AGU Example for IXS Beam Line O. Chubar

31 BROOKHAVEN SCIENCE ASSOCIATES PrFeB Magnet 77K Measurement PrFeB (53CR v2 magnet) Magnet Arrays Cut from a large piece  M vector uniformity is poor  Sorted by signature method Period Length = 14.5mm, Gap=4.85mm RT measurement on granite Hall probe bench (Gap=4.85mm) for the reference RT & LN 2 (77K) measurement on VTF Increase of ~19 % in Br

32 BROOKHAVEN SCIENCE ASSOCIATES 2m SCU-Field measurement setup (courtesy of A. Grau of KIT) 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 (CuBe wire Ø125µm) Position adjustment for stretched wire in x-y-direction via linear stages with encoders Measurement setup parts under construction

33 BROOKHAVEN SCIENCE ASSOCIATES Tunnel Cross Section of a Short Straight Section

34 BROOKHAVEN SCIENCE ASSOCIATES Tunnel Cross Section of a Long Straight Section mm (Minimum)