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WEPAB05 |
Conceptional design of CEPC Cryogenic system |
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- J.Q. Zhang, R. Han, S.P. Li
IHEP, Beijing, People’s Republic of China
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The CEPC has two rings, the booster ring and the collider ring. There are 432 superconducting cavities in total. In the booster ring, there are 96 ILC type 1.3 GHz 9-cell superconducting cavities; eight of them will be packaged in one 12-m-long module. There are 12 such modules. In the collider ring, there are 240 650 MHz 2-cell cavities; six of them will be packaged in one 11-m-long module. There are 40 of them. All the cavities will be cooled in a liquid-helium bath at a temperature of 2K to achieve a good cavity quality factor. The cooling benefits from helium II thermo-physical properties of large effective thermal conductivity and heat capacity as well as low viscosity and is a technically safe and economically reasonable choice. The 2K cryostat will be protected against heat radiation by means of two thermal shields cooling with 5-8K helium as well as 40-80K helium from a refrigerator. There are 4 cryo-stations along the 100km circular collider with the physical design of double ring. Generally, each cryo-station is supplied from a common cryogenic plant, with one refrigerator and one distribution box. The cooling capacity of each refrigerator is 18kW @ 4.5K.
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DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-eeFACT2018-WEPAB05
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About • |
paper received ※ 10 October 2018 paper accepted ※ 19 February 2019 issue date ※ 21 April 2019 |
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