THYA04
IMP/CAS, Lanzhou, People's Republic of China
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THYA04 |
The Conditioning and Operation of HWR Cryomodules for C-ADS | |
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| Four cryomodules designed to host half wave resonator(HWR) cavities have been successfully tested at IMP for the C-ADS project. The lessons of cryomodules conditioning, assemblies, and operations will be presented. Cryomodule consist of various complex subassemblies, starting from the inside with the niobium RF cavity and working out to the vacuum vessel. All of the prototypes use 6 β=0.10 HWR cavities dressed with helium vessel except the last one, which has 5 β=0.15 cavities. Early experimental results from the first cryomodule led to design improvements seen in the latest cryomodules. The cryogenic system provides 4.2 K liquid helium lines to 2 phase separator for cold mass, and 77K liquid nitrogen for thermal shield and current leads. An 1100 Aluminium shield is used as a thermal radiation shield. To meet a full period lattice structure, fewer warm-cold transitions and warm connector between cryomodules have been designed. All cryomodules have achieved the design goals both offline and online. Thus, the better three cryomodules are assembled in the linac tunnel and waiting for the running later. | ||
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Slides THYA04 [6.442 MB] | |
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