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SSRF Light Source Complex Zhao Zhentang for the SSRF Project Team

SSRF Light Source Complex Zhao Zhentang for the SSRF Project Team. Shanghai Symposium on Intermediate Energy Light Sources Shanghai China, September 24-26,2001. Introduction Design Overview Accelerator Systems Summary. Introduction. SSRF: Shanghai Synchrotron Radiation Facility

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SSRF Light Source Complex Zhao Zhentang for the SSRF Project Team

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  1. SSRF Light Source ComplexZhao Zhentang for the SSRF Project Team Shanghai Symposium on Intermediate Energy Light Sources Shanghai China, September 24-26,2001 • Introduction • Design Overview • Accelerator Systems • Summary

  2. Introduction • SSRF: Shanghai Synchrotron Radiation Facility An intermediate energy 3rd SR light source • A joint proposal of CAS and SMG in 1995 • Constructing a third generation SR light source in Shanghai by CAS • SMG’s commitment: one third of estimated budget • Concept Design phase from 1995 to 1998 • Approval of the 80M Yuan R&D Program in 1998

  3. Introduction • Two year’s R&D from Jan. 1999 to March 2001 • 41 accelerator and beamline components • The SSRF technical design • Site selection for the SSRF in 1999 • 5 candidates in Shanghai • Zhang-Jiang High-Teche Park

  4. Beijing Shanghai

  5. The SSRF Site in Shanghai

  6. SSRF Main Building Layout

  7. Design Overview • The Design Goals of the SSRF • A state of the art synchrotron radiation light source with high performance and cost-effectiveness • High brightness and high flux X-ray in the energy range from 0.1~40keV • High stable and high reliable as well as high flexible operation • Consideration on future upgrades and development (Top-up injection, Photo-cathode gun to enhance the Linac for FEL…)

  8. Design Overview • The Main Design Specification of the SSRF • Beam energy: 3.5 GeV • Beam Current: 200 ~ 300 mA • Emittance: ~10 nmrad • Circumference: <400 m • Linac also for driving DUV FEL

  9. Design Overview • The SSRF Layout • 300MeV Electron Linac • A 1Hz full energy booster • A 3.5GeV Storage Ring with 396m in circumference • Beam Lines and experimental stations

  10. Machine Overview • Photon Brightness and Flux

  11. Design Overview • The SSRF Storage Ring • Magnetic Lattice • 20 cells DBA structure with 10 of 5m and 10 of 7.24m straight sections. • Each DBA cell containing 2 dipole magnets, 10 quadrupoles and 7 sextupoles • High Flexibility in operation  High x and hybrid x configurations  Dispersion free and finite dispersion modes  Emittance: 4.8~12.1nmrad

  12. Main Parameters of the SSRF Storage Ring

  13. Design Overview • Dynamic Aperture Dynamic Aperture of the Low Emittance Hybrid x mode

  14. Design Overview • Orbit Stability Issues (10% of Beam Dimensions) • Temperature control and slow dynamic orbit correction ( 0.2~0.5 0C, 1~2 s ) • Fast global orbit feedback including 40 BPMs and 38 correctors • Beam Lifetime and Collective Effects • Beam lifetime >20 hours • Vertical beam feedback for damping the resistive wall induced instability

  15. Design Overview • The SSRF Injector • 300 MeV Electron Linac

  16. Design Overview

  17. Design Overview • Full Energy Booster

  18. BPM BPM QD QD Pump QF SD SF STZ STX B B 6703 1900 150 130 360 420 3300 6600

  19. 上海光源加速器装置

  20. Design Overview • Beam Lines in First Phase • Macromolecular Crystallography • High-Resolution Diffraction and Scattering • X-ray Absorption Fine Structure Spectroscopy • X-ray Micro-focus and Application • Medical Application • Soft X-ray Coherent Microscopy • LIGA • Infrared

  21. Accelerator Systems • Magnet System • 40 C-Shape Straight Bending Magnets • 200 Colin-Type Quadrupols • 140 C-Shape Sextupols • Design and Construction of 3 Prototypes • Magnetic Field Measurement Systems

  22. Bending Magnet (made in IHEP, Beijing)

  23. Quadrupole Magnet Sextupole Magnet (Made in Kelin, Shanghai) Made in CUSTC, Hefei

  24. Quadrupole Magnet Sextupole Magnet Harmonic Contents of Integral Field Error

  25. Rotating Coil Magnetic Measurement System

  26. Magnetic Field Mapping System

  27. Long Coil Magnetic Measurement System

  28. Accelerator Systems • Magnet Power Supply System • A SCR-Type Bending Magnet Power Supply 850A/900V (500A/100V, 1105/24hrs ) • 10 Chopper Type Power Supplies for Quadrupoles (360A/385V, 1104/24hrs ) • 14 Full PWM Bridge Converters with ZVS Mode for Sextupoles (140A/210V, 6104/24hrs ) • Design and Construction of the Prototypes

  29. Bending Magnet Power Supply 500A/100V, 1105/24hrs

  30. Power Supply Stability(450A@  2oC: < 1x10–5/24hrs)

  31. Sextupole Power Supply 储存环六极磁铁电源 140A/210V, 6104/24hrs

  32. Accelerator Systems • Vacuum System • Machined Antechamber made of Aluminium alloy • RF Shielded Bellows • Horizontal and Vertical Photon Absorbers • Combined TSP and SIP Pumps • A In-Situ Bake Out System • Dynamic Pressure of 1ntorr, Gas Load of 1104torrl/s

  33. 6m Antechamber Section

  34. Photon Absorber

  35. RF Shielded Bellow

  36. Accelerator Systems • Injection System • An Eddy Current Septum and a DC Septum • 4 Ferrite Kickers With Ceramic Chambers • Design and Construction of the Prototypes • An eddy current Septum with its pulser: 60s half-sine-wave, 0.62T peak field with stability of 0.1%, 0.02%stray field on the bump orbit • A kicker magnet with its pulser: 4s half-sine-wave, 0.12T peak field, jitter < 6.5ns

  37. Eddy Current Septum and Its Pulser 60s half-sine-wave 0.62T peak field, stability of 0.1% stray field to main field <0.02%

  38. Kicker Magnet and Its Pulser 4s half-sine-wave 0.12T peak field jitter time < 6.5ns

  39. Accelerator Systems • RF System • Beam Instrumentation • Control and Timing System: (EPICS-Based) • Storage Ring Girder • Electron Gun and Bunchers • Booster magnets and Stainless Steel Chamber • Beam Line Components

  40. Low Level RF Control System

  41. High Power RF System 500MHz, 150kW CW

  42. BPM And Its Mapping System 2m resolution

  43. Storage Ring Girder

  44. 100kV Electron Gun

  45. 上海光源加速器装置

  46. Bunchers RF Power>10MW

  47. Booster Magnets

  48. ID Front End

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