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Optimizing Cryogenic System Design for Superconducting Linear Free Electron Laser

Explore the requirements, design, and main equipment of the cryogenic system for the Superconducting Linear Collider Facility (SCLF). The system includes cryo-modules, heat loads, and cryogenic plant capacity with multiple plants and refrigerators, highlighting the importance of cryoplants for cooling SRF cryomodules and SCUs. Gain insights into the schematic layout and utilities of the cryogenic systems, including LN2 consumption, electrical power, cooling water usage, and storage facilities for helium gas and liquid nitrogen. Follow the schedule and project summary for designing, arranging equipment, and infrastructure development. Advance your knowledge in cryogenic system optimization for cutting-edge scientific facilities. (words: 100)

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Optimizing Cryogenic System Design for Superconducting Linear Free Electron Laser

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  1. Cryogenic System Design for SCLFZhengrong OUYANG SINAP

  2. contents • Requirements • System design • Main equipment • Utilities • Schedule

  3. Cryo-Modules Cryo-Modules: x 77 • 1.3 GHz Cryo-Modules: x 75 • Cavities: 8 • Length 12 m • Weight 8,000 kg • 3.9 GHz Cryo-Modules: x 2 • Cavities: 8 • Length 6 m • Weight 4,000 kg

  4. Heat Load of Cryogenic System 3* 4 kW/2 K

  5. Cryogenic Plant Capacity • Two plants (one for running SRF cryomodules, another for running SRF cryomodules＋SCUs), three refrigerators, each : • 4 kW @ 2.0K • 1.3kW @ 5K • 15kW @ 35~40K • 15 g/s of liquefaction @ 4.5 K • Each refrigerator uses either 5 stage serial connected sub-atmospheric centrifugal compressors (cold compressors) or 3~4 stages cold compressors + warm vacuum compressors to pump up to 215 g/s of 2.0K helium gas from 0.027 atm to 1.2 atm. • The cryoplants are to be used for cooling75 sets of 1.3GHz SRF cryomodules (8 9-cell cavities in one cryostat + SC magnets+ Cold BPM), and 3-40 SC undulators .

  6. Bird’s view of the SCLF length~ 3.2km，underground 38m Beamline Exp hall undulator 2nd plant Exp hall 1st plant Linac Injector

  7. 1st Cryo-Plant Storage & tower zone Compressor & coldbox Shaft 1

  8. 2nd Cryo-Plant CMTF Comp.&coldbox Storage.&tower Shaft 2

  9. Cryogenics systems schematic layout Compressor Compressor Compressor Purification Purification Purification 4.5K CB 4.5K CB 4.5K CB Lhe Dewar Lhe Dewar Lhe Dewar CP1 CP2 CP3 2K CB 2K CB 2K CB Shaft #1 Dis. Box Dis. Box Shaft #2 L0 LH L1 BC1 L2(CM4-21) BC2 L3(CM22-CM51) BREAK L4(CM52-CM75)

  10. Refrigerator (4 kW/2 K) ~18 kWeq 4.5K

  11. Preliminary dimensions of cold box

  12. Cold Compressors design

  13. Cold compressor

  14. Turbine

  15. Compressor For the system at Full Power ~ 13.2 MW Elec.

  16. Preliminary dimensions of compressor

  17. Utilities Cryogenic system LN2. consumption: 50 m3/day Electrical power: 13.2 MW Cooling water: 1250 m3/hour

  18. Utilities liquid helium storage（3*10000l） • helium gas storage（15000m3） • purification and recovery（50g/s） • liquid nitrogen storage（150 m3） • guard vacuum system

  19. Schedule of 18 kW/4.5K（4kW／2K）

  20. Scheduleof the Cryogenic System

  21. Summary • Designing of cryogenic system ( 3*4 kW/2 K, cold compressor) • Arranging equipment of the system； • Infrastructure ( building, power, cooling…); • CMTF (contract of refrigerator)；

  22. Thanks for your attention!

  23. 1st Plant Cooling tower LN2 storage He storage compressor Cold box compressor Interface-box

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