1 650MHz-Cryomodule for CEPC
2 基本结构的选择 XFEL, ILC, LCLS-II style Atlas, FRIB, ADS-Injector-II SNS, ESSCavity string supported from gas helium return pipe Atlas, FRIB, ADS-Injector-II Cavity string support from top plate of rectangular vessel SNS, ESS Cavity string supported using tension elements, with and without space frame SPL Cavities supported by the input coupler SSR1 , ADS-Injector-I Cavities supported by posts，and put them on the strongback
3 Configurations – EXFEL, ILC, LCLS-II
4 Configurations – XFEL, ILC, LCLS-II
5 Configurations – XFEL, ILC, LCLS-II
6 Configurations – XFEL, ILC, LCLS-II
7 Configurations – XFEL, ILC, LCLS-II
8 Configurations–FRIB, ADS-Injector-II
9 Configurations – Atlas, FRIB, etc.
10 Configurations – Atlas, FRIB, etc.
11 Configurations – Atlas, FRIB, etc.
12 Configurations – Atlas, FRIB, etc.
13 Configurations – SNS, ESS, etc.
14 Configurations – SNS, ESS, etc.
15 Configurations – SNS, ESS, etc.
16 Configurations – SPL
17 Configurations – SSR1 cryomodule
18 Configurations – ADS-Injector-I
19 Configurations – ADS-Injector-I
20 Configurations – ADS-Injector-I
21 结构形式比较 Concept 1 Concept 2 Vacuum vessel closed at both endsRoom temperature strongback – cavities supported from bottom Strongback is inside the vacuum vessel, outside the thermal shield Support post(s) for each cavity Concept 2 Cavity support similar to XFEL – cavities hanging from return pipe Support posts attached to return pipe not cavities
22 Concept 1 Heat exchanger enclosureVacuum vessel extension for bayonets, cryo valves, etc. Thermal shield Support post Strongback
23 Low and High-b cryomodule general configurationBeam pipe Bayonets connections, cryogenic valves, etc. Ports to access tuner motors Power couplers Heat exchanger
24 Illustration only – not representative of actual cavity stringConcept 1 Illustration only – not representative of actual cavity string He reservoir with level sensor 650 Cavity with 2-phase pipe Warm up cool down pipe Strong back with supports 4K circuit for intercepts Thermal shield
25 Concept 2 Heat exchanger 300 mm pipe Thermal shield He 2-phase pipe650 MHz cavity Bayonets, cryo valves, etc. Coupler port Vacuum vessel
26 Illustration only – not representative of actual cavity stringConcept 2 Cold mass supports: Fix Sliding Heat exchanger Coupler ports Illustration only – not representative of actual cavity string Beam pipe
27 Illustration only – not representative of actual cavity stringConcept 2 He reservoir with level sensor Warm up cool down pipe Illustration only – not representative of actual cavity string
28 Cryomodule design concepts - Pros and consConcept 1 (room temperature strongback) Many design features common with the current SSR1 cryomodule design Coupler port locations are fixed with respect to the vacuum vessel Support system not subject to thermal distortions during cooldown To date, unproven Concept 2 (XFEL-like design) Design concepts are direct descendants of the XFEL design Could possibly use tooling common to XFEL-like cryomodules Coupler positions change during cooldown Support pipe can distort during cooldown
29 High-b cryomodule Heat exchanger Check valve Gate valveTuner access ports
30 High-b cryomodule 2-phase manifold Support posts Strongback
31 High-b cryomodule
32 3.CEPC-SPPC/650MHz超导腔低温恒温器Concept 1 Concept 2
33 3.CEPC-SPPC/650MHz超导腔低温恒温器采用哪种型式？ 1）首先确定耦合器的位置，漏热。 2）各个束流设备的型式、要求、漏热。 3）各个设备的接口
34 THANKS