400 mA Beam Store with Superconducting RF Cavities at PLS-II
| Autor: | Sohn, Younguk, Chun, Myung-Hwan, Ha, Taekyun, Hong, Mansu, Joo, Youngdo, Kang, Heung-Sik, Kim, Hyung-Gyun, Kim, Kyung, Lee, Tae-Yeon, Park, Chong-Do, Park, Hong-Jib, Park, In Soo, Shin, Seunghwan, Yu, In-Ha, Yun, Jong Cheol |
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| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: | |
| DOI: | 10.18429/jacow-ipac2015-wepmn042 |
| Popis: | Three superconducting RF cavities were commissioned with electron beam in way of one by one during the last 3 years, and now PLS-II is in user service on the way of beam current to 400mA, the target of PLS-II. The cavities and cryomodules were prepared with SRF standard technology and procedures, then vertical test, windows conditioning, cryogenic test in each cryomodule, horizontal power test, conditioning, and commissioning without and with beam at PLS-II tunnel by collaboration with industries. All the cavities showed stable performances as good as not-observing any RF instability from cavities, couplers and windows up to 400 mA beam store, but observing several cavity quenches and minor vacuum bursts by abrupt power with control and human errors. The initial beam current for user run were recorded as 150 mA with one cavity, 280 mA with two cavities and 320 mA with three cavities. The 400 mA beam was also achieved with two cavities by decay mode and also with three cavities by top-up mode. The stabilities of RF amplitude and phase are good enough not to induce beam instabilities. Proceedings of the 6th Int. Particle Accelerator Conf., IPAC2015, Richmond, VA, USA |
| Databáze: | OpenAIRE |
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