| Title |
KEKB/SuperKEKB Cryogenics Operation |
| Authors |
- K. Nakanishi, K. Hara, T. Honma, K. Hosoyama, M.K. Kawai, Y. Kojima, Y. Morita, H. Nakai, N. Ohuchi, H. Shimizu
KEK, Ibaraki, Japan
- T. Endo, T. Kanekiyo
Hitachi Plant Mechanics Co,.Ltd., Kudamatsu city, Japan
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| Abstract |
KEKB/SuperKEKB cryogenics operation will be introduced. KEKB was built in the tunnel of the TRISTAN accelerator. The TRISTAN accelerator was operated from 1986 to 1995. The superconducting acceleration cavities were installed in 1988 to increase the beam energy. The cryogenic system for superconducting cavities was also established simultaneously. In 1989 superconducting cavities were added, and cryogenic systems were also enhanced from 4kW to 6.5kW. KEKB took over many facilities from TRISTAN. The cryogenic system for superconducting cavities is one of them. This old refrigerator is used also in SuperKEKB. In operation of the cryogenic system, it is necessary to cool down the equipment from room temperature. In KEKB, its cooling rate of cavities are limited to 2.5~3K/h. In the steady state, the pressure and the liquid level in the superconducting cavity cryomodule should be kept constant. To keep the condition in the cryomodule stably, the sum of the heat generated by RF and the heater is controlled as constant. In KEKB/SuperKEKB, superconducting magnets are also used. They have their own refrigerator. In the workshop, they are also introduced.
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| Paper |
download WEPAB04.PDF [1.346 MB / 6 pages] |
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| Conference |
eeFACT2018 |
| Series |
ICFA ABDW on High Luminosity Circular e$^+$e$^-$ Colliders (62nd) |
| Location |
Hong Kong, China |
| Date |
24-27 September 2018 |
| Publisher |
JACoW Publishing, Geneva, Switzerland |
| Editorial Board |
Ying-ying Li (HKUST, Hong Kong, China); Lu Li (IMP/CAS, Lanzhou, China); Volker RW Schaa (GSI, Darmstadt, Germany) |
| Online ISBN |
978-3-95450-216-5 |
| Received |
24 September 2018 |
| Accepted |
19 February 2019 |
| Issue Date |
21 April 2019 |
| DOI |
doi:10.18429/JACoW-eeFACT2018-WEPAB04 |
| Copyright |
 Published by JACoW Publishing under the terms of the Creative Commons Attribution 3.0 International license. Any further distribution of this work must maintain attribution to the author(s), the published article's title, publisher, and DOI. |
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