Insertion Devices Toshi Tanabe Insertion Device Group Leader
Insertion Devices Toshi Tanabe Insertion Device Group Leader Accelerator System Advisory Committee October 22 -23, 2009 1 BROOKHAVEN SCIENCE
Outline • • • Changes / Progress since last ASAC ID review ID Table / Official Schedule Progress on Each Device R & D (Pr. Fe. B, IVMMS, 4 m Square Chamber) FY 10 Goals and Milestones Conclusions 2 BROOKHAVEN SCIENCE
Changes since ASAC 07 • • • PCR to reschedule (pushed later due to labor shortage) some activities in 1. 02. 01. 03 & 1. 03. 08. 02 PCR approved to add SRX beamline device (1. 5 m IVU with 21 mm period) with canting magnet and vacuum chamber for the second device section Additional IVUs requested to be added to the baseline • For IXS beamline (2 x 3 m IVU with 22 mm period having wider pole) • Additional IVUs might be added to outside the project baseline • 2 -3 IVUs for NIH funded beamlines • 6 -7 MIE devices (specs not decided) 3 BROOKHAVEN SCIENCE
Progress since ASAC 07 • New Hires • • • A Mechanical Engineer (0. 9 FTE: starting on 11/08) An Electrical Engineer (0. 8 FTE: starting on 04/09) One Mechanical Technician (T 6) position open One Assistant Scientist (S 1) position open One Electrical Engineer (P 5) position open • Technical Status of Systems • • • PM Damping Wiggler (DW) Design and Build Contract with APS In-Vacuum Undulator (IVU) Mechanical design started Elliptically Polarized Undulator (EPU) Specs determined Three Pole Wiggler (3 PW) Interraction study on going Magnet Development Laboratory (Insertion Device Magnet Measurement Facility) Hall probe bench purchased, Clean room RFP completed. 4 BROOKHAVEN SCIENCE
NSLS-II Insertion Devices (SEP/09) *For each plane 5 BROOKHAVEN SCIENCE
PCR required 6 BROOKHAVEN SCIENCE
Damping Wiggler • • Nd. Fe. B-PM with Side Magnets and Permendur Pole (width 80 mm), lu=90 mm, Gap=12. 5 mm, Symmetric magnetic field Vacuum Chamber (APS type? ), Aperture Size 9. 5 mm (v) x 76 mm (h) Conceptual Design Symmetic Field with 37 Full Strength Per 7 BROOKHAVEN SCIENCE
APS Proposal • Similar concept as LSLS undulator • CAD Model 8 BROOKHAVEN SCIENCE
NSLS-II In-Vacuum Undulator • • • X 25 -MGU based IVU lu=20 mm, Minimum Gap=5. 0 mm, 3 m Long Baseline design uses conventional Nd. Fe. B (Br=1. 12 T, Hcj=30 k. Oe) Future cryo-option with Pr. Fe. B Magnet Cold Measurement System is being developed for CPMU mode Vacuum Chamber shape still undecided (Square v. s. Cylindrical) Opera 3 D Simulation NSLS MGU-X 25 9 BROOKHAVEN SCIENCE
Elliptically Polarized Undulator (EPU) • • • Apple -II, lu=49 mm, 2 x 2 m Long (canted 0. 125 mrad: 0. 25 mrad: -0. 125 mrad) Gap=11. 5 mm (Enough space for current strips for dynamic multipole correction) Vacuum Chamber Aperture Size 8. 0 mm (v) x 61 mm (h) (tentative) Linear Vertical 10 Helical 45°Inclined BROOKHAVEN SCIENCE
Three Pole Wiggler (3 PW) (WBS 1. 03. 07. 04) • Design (Central Pole Gap=28 mm) • Br=1. 22 T, Permendur Center Pole & Soft Iron (1006) Side Poles • Rectangular Magnets • Insert / Extract from a side of the chamber • ACD Design 11 BROOKHAVEN SCIENCE
TPW Estimated Emission Spectra (taking into account contribution from Bending Magnets) Spectral Flux per Unit Surface at Different Horizontal Positions at 30 m from TPW Electron Energy: 3 Ge. V; Current: 0. 5 A; Emittance: 0. 9 nm Rel. Energy Spread: 8. 9 x 10 -4 Twiss Parameters of Dispersion Section (end) 12 BROOKHAVEN SCIENCE
Interaction Study for 3 PW, Corrector and Dipole Magnet Electron Beam 35 mm Dipole 156 mm Corrector 3 Pole Wiggler 225 mm 200 mm 13 BROOKHAVEN SCIENCE
ID Tolerance Requirement (SEP/09) • 1 st & 2 nd Integrals • Insertion Device Integrated Multipoles Unit 14 BROOKHAVEN SCIENCE
Feed Back Estimate (by L. H. Yu) ID at Short straight section at 80 m with kicks at the ends vertically corresponding to ID with correction coils I 1=5 Gauss. cm , I 2=300 Gauss. cm 2 , for one sample. Feedback on Feedback off Detail near ID, Feedback on 15 BROOKHAVEN SCIENCE
Magnet Development Lab (WBS 1. 02. 01. 03) Insertion Device Magnetic Measurement Facility (WBS 1. 03. 08. 02) • ISO 14644 -1 Class 7 (former Class 10000) Temperature Controlled Semi-Clean Room for IVU Measurement • • 25. 5 °C ± 0. 2 °C < 20 °C for IVU Array cooling water, 25. 5 °C for tunnel temp, and 28 °C for genetic cooling water Low vibration required by pulsed wire measurement Cleanliness is also required for air-bearing stage in Hall probe bench Standard ID measurement setups • • • 6. 5 m Hall probe bench (Kugler) Integrated Field Measurement System (Flip coil, Moving wire, etc. ) Stretched / pulsed wire system (3 -4 m) HV pulser for pulsed wire. Magnet characterization equipment (Helmholtz coil / small moving coil) 3 D-Probe calibration system with a dipole magnet (PS ~ 200 A / 80 V) BROOKHAVEN SCIENCE 16
Bldg. 832 3 D-Layout ISO-7 Clean Room for Measurement ID Lab Tech Shop Pulsed Magnet Lab RF Lab 17 BROOKHAVEN SCIENCE
Insertion Device R&D • Remaining R&D activities • • • In-Vacuum Hall probe measurement system Square UHV-ID chamber development Improved pulsed wire system development Pr. Fe. B array test in VTF with re-circulating refrigerator Possible Additional Future R&D activities • SCU development (APC wire, HTS tape and bulk HTS) • Micro multi-turn coils development • Textured Dy pole development 18 BROOKHAVEN SCIENCE
Pr. Fe. B Magnet 77 K Measurement • Pr. Fe. B (53 CR v 2 magnet) Manget 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 references • RT & LN (77 K) measurement on VTF • Increase of ~19 % in B 19 BROOKHAVEN SCIENCE
Pr. Fe. B H v. s. M at 77 K Measured by SQUID 20 BROOKHAVEN SCIENCE
Phase Error Change from RT to LN 2 temp. • RMS Phase Error = 3. 1 degree = 3. 5 degree lu = 14. 489 mm lu = 14. 503 mm 21 BROOKHAVEN SCIENCE
Phase Error Change from LN 2 to LHe temp. Hall Probe Output Voltages • RMS Phase Error = 6. 8 degree = 3. 5 degree lu = 14. 433 mm lu = 14. 489 mm 22 BROOKHAVEN SCIENCE
4 m Square UHV Proto Type (Preliminary) • 4 m Square UHV Chamber • • 23 Test of sealing, deformation Either Aluminum or 316 LN Will be mated to IVMMS for testing Impedance Effect OK BROOKHAVEN SCIENCE
FY 10 Goals & Milestones • • DW Detailed Design • Procure or Develop Wire Based Integrated Field Measurement System • Proto Type In-Vacuum Magnetic Measurement System (IVMMS) • • Proto Type 4 m Square UHV Chamber Set up a Clean Room and Hall Probe Bench in Bldg. 832 Proto Type ID Control HW Test 24 BROOKHAVEN SCIENCE
ID-Group FTE Profiles in the Baseline Budget Category Scientist (T. Tanabe, O. Chubar. Assigand S 1) Mechanical Engineer (J. Rank, C. Spataro. Assig) Electrical Engineer (D. A. Harder and P 5) Mechanical Technician (T 6) Total 2009 2010 2011 2012 2013 2014 1. 3 2. 0 2. 2 1. 5 1. 0 1. 4 1. 5 1. 0 0. 5 0. 8 1. 5 2. 0 0. 5 0. 2 1. 0 1. 0 3. 7 6. 0 6. 7 5. 5 3. 0 25 BROOKHAVEN SCIENCE
Summary • Damping Wigglers • Negotiations of design and build contract with APS continue • • IVU • Design effort starts with SRX-IVU • Transition region design is unconventional due to adjacent small gap for IDBPM • Long Straight IVU not trivial EPU • Active shimming with current strips are being investigated. 3 PW • Only Design budget is in the baseline budget. Need to create PCR to construct a proto type R&D and Future Devices • IVMMS design continues • 4 m Square vacuum chamber design continues • Pr. Fe. B CPMU will be very promising candidate for next generation undulator 26 BROOKHAVEN SCIENCE
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