A particle-in-cell mode beam dynamics simulation of medium energy beam transport for the SSC-Linac |
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Authors: | XIAO Chen ; HE Yuan YUAN You-Jin LU Yuan-Rong LIU Yong WANG Zhi-Jun DU Xiao-Nan YAO Qing-Gao LIU Ge XU Meng-Xin HE Shou-Bo XIA Jia-Wen |
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Institution: | 1 Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China 2 Graduate University of Chinese Academy of Sciences,Beijing 100049,China 3 Key Laboratory of Heavy Ion Physics Ministry of Education,Peking University,Beijing 100871,China 4 School of Nuclear Science and Technology,Lanzhou University,Lanzhou 730000,China |
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Abstract: | A new linear accelerator system,called the SSC-Linac injector,is being designed at HIRFL (the heavy ion research facility of Lanzhou).As part of the SSC-Linac,the medium energy beam transport (MEBT) consists of seven magnetic quadrupoles,a re-buncher and a diagnose box.The total length of this segment is about 1.75 m.The beam dynamics simulation in MEBT has been studied using the TRACK 3D particle-in-cell code,and the simulation result shows that the beam accelerated from the radio frequency quadrupole (RFQ) matches well with the acceptance of the following drift tube linac (DTL) in both the transverse and longitudinal phase spaces,and that most of the particles can be captured by the final sector focusing cyclotron for further acceleration.The longitudinal emittance of the RFQ and the longitudinal acceptance of the DTL was calculated in detail,and a multi-particle beam dynamics simulation from the ion source to the end of the DTL was done to verify the original design. |
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Keywords: | SSC-Linac MEBT PIC mode acceptance re-buncher |
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