The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
TY - UNPB AU - Mei, Z.Y. AU - Fan, K. AU - Li, L.X.F. AU - Zeng, Z.J. AU - Zhang, L.G. ED - Schaa, Volker RW ED - Ji, Daheng ED - Li, Lu ED - Zhao, Ning TI - Internal PIG Source Design for a Superconducting Cyclotron in the HUST Proton Therapy Facility J2 - Proc. of SAP2017, Jishou, China, 28-30 August 2017 C1 - Jishou, China T2 - Symposium on Accelerator Physics T3 - 13 LA - english AB - A 250 MeV isochronous superconducting cyclotron was adopted in the HUST proton therapy facility. For meeting the essential requirement of providing initial proton beam, a cold-cathode PIG internal ion source with constant arc current has been designed carefully. The internal ion source is made up of two halves anode cathode pairs and a slim chimney with diameter of 7 mm for the sake of the very compact structure in the central region. Since the great influence on the initial proton beam quality, the structure of the chimney's slit has been optimized iteratively with the simulation code COMSOL. Besides, to study and optimize the ion source practically, an internal PIG source experimental test bench has been designed meticulously. By changing the main parameters and the relevant structures of the ion source in the test bench, an optimum internal PIG source configuration with high stability proton beam has been obtained experimentally. This paper presents the design of the internal PIG source and the experimental test bench. PB - JACoW CP - Geneva, Switzerland ER -