Author: Chen, Y.
Paper Title Page
MOP001 Design and Commissioning of RF System for SC200 Cyclotron 21
 
  • G. Chen, C. Chao, Y. Chen, K.Z. Ding, G. Liu, X.Y. Long, Z. Peng, Y. Song, C. Yu, X. Zhang, Y. Zhao
    ASIPP, Hefei, People’s Republic of China
  • L. Calabretta, A.C. Caruso
    INFN/LNS, Catania, Italy
  • O. Karamyshev
    JINR/DLNP, Dubna, Moscow region, Russia
  • G.A. Karamysheva, G. Shirkov
    JINR, Dubna, Moscow Region, Russia
 
  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.  
poster icon Poster MOP001 [0.720 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-MOP001  
About • paper received ※ 09 September 2019       paper accepted ※ 24 September 2019       issue date ※ 20 June 2020  
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MOP003 Optimal Design and Fluid-Solid Coupling Thermal Analysis of SC200 Superconducting Proton Cyclotron Electrostatic Deflector 27
 
  • Y. Xu, Y. Chen, K.Z. Ding, X.Y. Huang, J. Li, K. Pei, Y. Song
    ASIPP, Hefei, People’s Republic of China
  • K. Gu
    HFCIM, HeFei, People’s Republic of China
 
  Funding: National Natural Science Foundation of China under grant No. 11775258 & 11575237 and International Scientific and Technological Cooperation Project of Anhui (grant No. 1704e1002207).
In recent years, the study of proton therapy equipment has received increasing attention in China. Hefei CAS Ion Medical and Technical Devices Co., Ltd. (HFCIM) is developing a proton medical device based on the super-conducting proton cyclotron. The electrostatic deflector (ESD) is the key extraction component of the SC200 superconducting cyclotron, which uses a high-intensity electric field to bend the beam from the track. The fierce interaction between the proton beam and the deflector septum, causes a great loss of beam and unwanted excess heat accumulation and radiation. In order to minimize the risk of damage caused by the proton beam loss, the fluid solid-thermal coupling analysis of the deflector was per-formed by applying computational fluid dynamics (CFD) on ANSYS. The maximum temperatures of the septum in various cases of the cooling water speed, the septum thickness and material have been investigated respective-ly. The result based on analysis provide a valuable refer-ence for the further optimization on the material selection and structural design for ESD.
 
poster icon Poster MOP003 [0.735 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-MOP003  
About • paper received ※ 15 September 2019       paper accepted ※ 24 September 2019       issue date ※ 20 June 2020  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)