Physics Design For Axial Injection System and Central Region of 100MeV High Intensity Cyclone

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YAO Hong-Juan, ZHANG Tian-Jue, JIA Xian-Lu, GUAN Feng-Ping, WEI Su-Min, LV Yin-Long and LIN Yu-Zheng. Physics Design For Axial Injection System and Central Region of 100MeV High Intensity Cyclone[J]. Chinese Physics C, 2006, 30(S1): 141-143.
YAO Hong-Juan, ZHANG Tian-Jue, JIA Xian-Lu, GUAN Feng-Ping, WEI Su-Min, LV Yin-Long and LIN Yu-Zheng. Physics Design For Axial Injection System and Central Region of 100MeV High Intensity Cyclone[J]. Chinese Physics C, 2006, 30(S1): 141-143. shu
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Received: 2005-12-07
Revised: 1900-01-01
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Physics Design For Axial Injection System and Central Region of 100MeV High Intensity Cyclone

    Corresponding author: YAO Hong-Juan,
  • Department of Engineering Physics Tsinghua University, Beijing 100084, China2 China Institute of Atomic Energy, Beijing 102413, China

Abstract: A 100MeV high intensity cyclotron was designed to provide more than 200μA proton beam, and will provide pulse beam. The injection system has two considerations, which correspond to the 1# and 2# injection lines. The 1# line is designed to solve the DC beam injection using the neutralization with H-beam. For a high neutralization, the transverse focusing elements are all magnetic ones. The purpose of the 2# line is to provide pulse beam with certain intensity. It's difficult to build neutralization for the pulse beam, so the transverse focusing elements are all static electronic. The proper design for the structure of the two injection lines makes operation easy. Using computer program, including space charge effect calculations, we matched the injection optics for different neutralization degrees. The emphases of the calculations are getting 40° phase acceptance. The results calculated from the ion source to 15 turns acceleration show that the injection system designed for the 100MeV cyclotron can control the beam envelope efficiently and reduce the beam loss. The central region with the high RF phase acceptance makes the 100MeV machine have the ability of accelerating high intensity H beam.

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