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MOP14 Study of the Beam Extraction from Superconducting Cyclotron SC200 extraction, cyclotron, proton, resonance 87
 
  • K.Z. Ding, Y.F. Bi, G. Chen, Y. Chen, Sh. Du, H. Feng, J. Ge, J. Li, Y. Song, Y.H. Xie, J. Zheng
    ASIPP, Hefei, People's Republic of China
  • O. Karamyshev, G.A. Karamysheva, N.A. Morozov, E.V. Samsonov, G. Shirkov
    JINR, Dubna, Moscow Region, Russia
 
  According to the agreement between the Institute of Plasma Physics (ASIPP) of the Chinese Academy of Sciences in Hefei, China, and Joint Institute for Nuclear Research (JINR), Dubna, Russia, the project of superconducting isochronous cyclotron for proton therapy SC200 is under development at JINR. The cyclotron will provide acceleration of protons up to 200 MeV with maximum beam current ~1 μA. Extraction system of the beam consists of electrostatic deflector and two passive magnetic channels. Electric field strength in deflector does not exceed 170 kV/cm, gradients of magnetic field in channels are in range 2-4 kG/cm.The first of the channels focusing the beam in horizontal plane is subdivided into four parts. Geometry and magnetic field of two and three bars sub channelsare described. Results of the beam tracking inside extraction system are presented. Efficiency of the beam extraction was estimated for different amplitudes of the betatron oscillations in accelerated beam.  
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