The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
TY - CONF AU - Dabin, J. AU - Adant, B. AU - Cailliau, P. AU - Ellis, K. AU - Forton, E. AU - Mandrillon, J. AU - Ponter, T.S. AU - Verbruggen, P. ED - Conradie, Lowry ED - De Villiers, John Garrett ED - Schaa, Volker RW TI - Cyclotron Cavity Pollution Recovery J2 - Proc. of Cyclotrons2019, Cape Town, South Africa, 23-27 September 2019 CY - Cape Town, South Africa T2 - International Conference on Cyclotrons and their Applications T3 - 22 LA - english AB - In a cyclotron, RF cavities are usually among the most reliable subsystems, provided minimal care and maintenance. Nevertheless, several parameters may affect cavity performance after several years of operation. To name a few typical causes of degradation are: decreasing vacuum quality, various gas loads or gas qualities triggering adverse effects, deposition of highly emissive material on the cavity due to overheating of components like pass-through connectors, accidental use of chemicals or not-suitable greases. The cavity status can be monitored but, in the worst cases, the RF tuning may become difficult and it is important to apply methods in order to recover a better cavity Q-factor. In this paper, cases of cavity pollution will be shown, their potential root causes discussed and some recovery methods described. PB - JACoW Publishing CP - Geneva, Switzerland SP - 169 EP - 172 KW - cavity KW - cyclotron KW - multipactoring KW - vacuum KW - electron DA - 2020/06 PY - 2020 SN - 978-3-95450-205-9 DO - doi:10.18429/JACoW-Cyclotrons2019-TUP009 UR - http://jacow.org/cyclotrons2019/papers/tup009.pdf ER -