1. Study and Development of Large Cryogenic Systems in China
中国科学院理化技术研究所
Technical Institute of Physics and Chemistry, CAS
Study and Development of Large Cryogenic Systems in China
Liu, Liqiang
TTC Meeting
Beijing, December, 2011

2. Contents Cryogenic system of BEPCII (IHEP & TIPC)
Cryogenic system of SSRF (SINAP & TIPC)
Cryogenic system of PKU-FEL (PKU & TIPC)
Cryogenic system of EAST (IPP)
Cryogenic system of CSNS (IHEP & TIPC)
International projects (TIPC)

3. 1 Cryogenic system of BEPCII
Beijing Electron-Positron Collider Upgrade

4. 1 Cryogenic system of BEPCII
2 cavities, 500 MHz & one cell each
Cavities are made of niobium and will work at 4.5 K.
Cavity resides inside a stainless steal liquid helium vessel of 290 liter.
Thermal loads include about the 30 W static load and 84 W dynamic load.

5. 1 Cryogenic system of BEPCII
A pair of SC interaction quadrupoles
Consisting of 7 windings (SSQ, SCB, SCB or HDC, VDC, SKQ, ASI-3)

6. 1 Cryogenic system of BEPCII

7. 1 Cryogenic system of BEPCII

8. 1 Cryogenic system of BEPCII

9. 1 Cryogenic system of BEPCII Fabrication of cryogenic transfer lines

10. 1 Cryogenic system of BEPCII Installation and commissioning

11. 1 Cryogenic system of BEPCII
Success!

12. 2 Cryogenic system of SSRF
Shanghai Synchrotron Radiation Facility
The third generation light source
The Investment is 1.30 BCNY
Including three SC RF cavities ( Hz / 4.0 MV)
A cryo-plant is needed

13. 2 Cryogenic system of SSRF
Refrigerator: 650W/4.5K
LHe Dewar: 2000L
Valve Boxes: 4
LN tank: 40m3
GHe Storage Tanks: 4×100m3

14. 2 Cryogenic system of SSRF

15. 2 Cryogenic system of SSRF
Flow Scheme (PID)

16. 2 Cryogenic system of SSRF
Process analysis

17. 2 Cryogenic system of SSRF
Design of cryogenic transfer lines

18. 2 Cryogenic system of SSRF
Piping work
Ready for installation
Clean room
Pre-treatment in clean room
welding
Installation in tunnel
Cleaning test

19. 2 Cryogenic system of SSRF
Cryogenic system in 09/2008

20. 3 Cryogenic system of PKU-FEL
Peking University FEL Facility
The 1st 2K (56W) engineering system in China

21. 3 Cryogenic system of PKU-FEL
1.8K, 4K, 80K cryogenic transfer lines for PKU-FEL cryogenic system

22. 3 Cryogenic system of PKU-FEL
Valve box and control system for PKU-FEL cryogenic system

23. 3 Cryogenic system of PKU-FEL
Commissioning of 4K and 2K cryogenic systems for PKU-FEL

24. 4 Cryogenic system of EAST
Experimental Advanced Superconducting Tokamak

25. 4 Cryogenic system of EAST
EAST is the world's first non-circle cross-section full SC tokamak.
1998: approved 2000: construction started
2005: assembly finished 2006: commissioning completed
All of the TF and PF magnets are made of NbTi/Cu CICC and are cooled with forced flow supercritical helium at 3.8 K
A cryoplant with an equivalent capacity of 2 kW/4K (1050 W/3.5 K + 200W/4.5K + 13 g/s LHe + 13 kW/80 K) is built by IPP
Design, construction and commissioning: IPP, China
Compressor: China
Turbines: Geliymash, Russia
Cryogenic Valves: WEGA, CH
HX: China

26. 4 Cryogenic system of EAST
Thermal Shield and Support
Toroidal Magnet and Intercoil Structure
Poloidal Magnet and Support
LN2
ORP C1 C2 T1 T2 T3
4.4K
3.5K
HT-7U T4
Current leads
Busline
4 Cryogenic system of EAST
PFD of cryogenic system of EAST

27. 4 Cryogenic system of EAST The cold box of cryoplant

28. 4 Cryogenic system of EAST 1st cool-down of TF coils

29. 5 Cryogenic system of CSNS
China Spallation Neutron Source
Drift-tube linac
Rapid Cycling Synchrotron

30. 5 Cryogenic system of CSNS Layout of cryogenic system for CSNS
Exhaust tower
LN2 tank
Helium buffer
Helium CB
Hydrogen CB
Instrument
Instrument
LH2 moderator
He station
Target station
H2 station
100m25m
Target station and instrument hall
Instrument
Helium compressor
Proton beam
200m28m
Layout of cryogenic system for CSNS

31. 5 Cryogenic system of CSNS Flow scheme of cryogenic system for CSNS

32. 5 Cryogenic system of CSNS
helium cryoplant developed by TIPC for CSNS

33. 5 Cryogenic system of CSNS
Helium turbo-expander
Helium compressor
Cold Box
Dummy heat load
PFD of helium cryoplant developed by TIPC for CSNS

34. 6 International projects -LHC
5 cryogenic islands; 8 refrigerators ( K each)
Possibility: 1 or 2 refrigerators for 1 sector

35. 6 International projects -LHC
Our contributions:
CD & WU simulation on LHC sectors
Commissioning analysis of LHC cryogenic system

36. 6 International projects - ITER

37. 6 International projects - ITER
Our contributions:
Thermal simulation
Conceptual design of key components
2D Simulation of temperature distribution during cool-down of ITER magnets

38. 6 International projects - ITER
3D Simulation of temperature distribution during cool-down of ITER magnets

39. 6 International projects - ITER
3D design of Auxiliary Cold Boxes (ACB) of ITER cryogenic system

40. Thank you！ LIU, Liqiang Telephone: +86-10-6255-4669