Design and Commissioning of RF System for SC200 Cyclotron

Chen, Gen; Calabretta, Luciano; Caruso, Antonio; Chao, Chujie; Chen, Yonghua; Ding, Kaizhong; Karamyshev, Oleg; Karamysheva, Galina; Liu, Guang; Long, Xuyun; Peng, Zhen; Shirkov, Grigori; Song, Yuntao; Yu, Chuansong; Zhang, Xin; Zhao, Yanping

doi:10.18429/JACoW-Cyclotrons2019-MOP001

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RIS citation export for MOP001: Design and Commissioning of RF System for SC200 Cyclotron

TY  - CONF
AU  - Chen, G.
AU  - Calabretta, L.
AU  - Caruso, A.C.
AU  - Chao, C.
AU  - Chen, Y.
AU  - Ding, K.Z.
AU  - Karamyshev, O.
AU  - Karamysheva, G.A.
AU  - Liu, G.
AU  - Long, X.Y.
AU  - Peng, Z.
AU  - Shirkov, G.
AU  - Song, Y.
AU  - Yu, C.
AU  - Zhang, X.
AU  - Zhao, Y.
ED  - Conradie, Lowry
ED  - De Villiers, John Garrett
ED  - Schaa, Volker RW
TI  - Design and Commissioning of RF System for SC200 Cyclotron
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  - The SC200 proton therapy superconducting cyclotron is currently under construction by ASIPP (Hefei, China) and JINR (Dubna, Russia). The radio frequency (RF) system which provides an accelerating electric field for the particles, has been designed and tested in a high-power commissioning. The RF system consists of RF cavity, Low-level RF control system, RF source, transmission network and so on. The main performances of RF cavity meet design and use requirements in the cold test. The RF cavity achieved with an unload Q factor of 5200 at the resonant frequency of 91.5 MHz, 60 kV (Center)~120 kV (Extraction) accelerating voltage and coupling state of S11 <-30 dB. The low-level RF (LLRF) system has been tested with an amplitude stability of <0.2% and a phase stability of <0.1 degree in the high-power commissioning. What is more, the cavity operated in a ~50 kW continuous wave state after 4 weeks RF conditioning. Some risks have exposed at higher power test, but related solutions and improvements have been developed. In future work, the target of RF system is effective operation under the overall assembly of cyclotron after further optimization and RF conditioning.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 21
EP  - 23
KW  - cavity
KW  - cyclotron
KW  - controls
KW  - MMI
KW  - LLRF
DA  - 2020/06
PY  - 2020
SN  - 978-3-95450-205-9
DO  - doi:10.18429/JACoW-Cyclotrons2019-MOP001
UR  - http://jacow.org/cyclotrons2019/papers/mop001.pdf
ER  -