1. 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

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

11. Machine Overview  Photon Brightness and Flux

12. 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

13. Main Parameters of the SSRF Storage Ring

15. Design Overview /Dynamic Aperture Dynamic Aperture of the Low Emittance Hybrid  x mode

16. Design Overview /Orbit Stability Issues (10% of Beam Dimensions)  Temperature control and slow dynamic orbit correction ( 0.2~0.5 0 C, 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

17. Design Overview  The SSRF Injector /300 MeV Electron Linac

18. Design Overview

19. /Full Energy Booster

20. B B QDQD QDQD QFQF SFSF SDSD 67 03 6600 150150 130130 420420 36 0 Pum p ST Z ST X BP M 19 00 3300

21. 上海光源加速器装置

22. Design Overview  Beam Lines in First Phase 1.Macromolecular Crystallography 2.High-Resolution Diffraction and Scattering 3.X-ray Absorption Fine Structure Spectroscopy 4.X-ray Micro-focus and Application 5.Medical Application 6.Soft X-ray Coherent Microscopy 7.LIGA 8.Infrared

23. 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

24. Bending Magnet (made in IHEP, Beijing)

25. Quadrupole MagnetSextupole Magnet (Made in Kelin, Shanghai)Made in CUSTC, Hefei

26. Quadrupole MagnetSextupole Magnet Harmonic Contents of Integral Field Error

27. Rotating Coil Magnetic Measurement System

28. Magnetic Field Mapping System

29. Long Coil Magnetic Measurement System

30. 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

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

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

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

34. 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  4 torr  l/s

35. 6m Antechamber Section

36. Photon Absorber

37. RF Shielded Bellow

38. 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

39. 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%

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

41. 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

42. Low Level RF Control System

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

44. BPM And Its Mapping System 2  m resolution

45. Storage Ring Girder

46. 100kV Electron Gun

47. 上海光源加速器装置

48. Bunchers RF Power>10MW

49. Booster Magnets

50. ID Front End

51. Metal Gate Valve and Fast Vacuum Interlock

52. CVD BPM at ID Front End

53. Long Trace Profiler

54. Double Crystal Monochromator

55. Water Cooled 4 Blade Slits

56. Summary  The SSRF specifications have been detailed with completion of the technical design.  The prototypes made under the R&D are qualified for formal construction by minor modification.  Detailed Design and System Integration as well as new technology development  We will start to integrate the existing components into an electron linac from this autumn.

57. Shanghai Synchrotron Radiation Facility

58. Thank you for your attention ！ 谢谢！