Design of an RFQ for direct plasma injection scheme

Design of an RFQ for direct plasma injection scheme 1 2 corresp first-author Corresponding author. E-mail address: jolly@impcas.ac.cn Corresponding author. E-mail address: jolly@impcas.ac.cn jolly@impcas.ac.cn 3 1 1 1 1 1 2 1 2 1 2 1 2 Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China Graduate University of Chinese Academy of Sciences, Beijing 100049, China Graduate University of Chinese Academy of Sciences, Beijing 100049, China Institut für Angewandte Physik, Goethe Universität. Frankfurt, D60438, Frankfurt-am-Main, Germany Institut für Angewandte Physik, Goethe Universität. Frankfurt, D60438, Frankfurt-am-Main, Germany A high current radio frequency quadrupole (RFQ) is being studied at the Institute of Modern Physics, Chinese Academy of Sciences (IMP, CAS) for the direct plasma injection scheme (DPIS). Because of the strong space charge of beams from laser ion source, the beam dynamics design of the RFQ has been carried out with a new code, which can deal with space charge effectively. The design of the RFQ structure is performed with an electromagnetic simulation code and the determination of parameters of the structure has been done to maximize the shunt impedance when the frequency is kept fixed. The influences of dipole mode effect and flatness on beams were also discussed. LINACSrfq code 4-rod structure Dipole mode effect Flatness References ZHANG Zhouli , Jameson R A , Zhao Hongwei , et al . Nucl Instrum Met Phys Res A , 2008 , 592 ( 3 ): 197 - 200 . Nucl Instrum Met Phys Res A Kondrashev S , Balabaev A , Konukov K , et al . New developments of a laser ion source for ion synchrotrons , in: Proceedings of EPAC’04 , Lucerne , July 2004 : 1402 - 1404 . New developments of a laser ion source for ion synchrotrons Kondrashev S , Okamura M , Jameson R , et al . Acceleration of intense beams of highly-charged ions using direct plasma injection scheme , in: Proceedings of HB2006 , Tsukuba, Japan , 2006 : 341 - 343 . Acceleration of intense beams of highly-charged ions using direct plasma injection scheme Lombardi A , Parisi G , Vretenar M . Comparison study of RFQ structures for the Lead Ion LINAC at CREN , in: Proceedings of EPAC’92 , Berlin, Germany , March 1992 : 557 - 559 . Comparison study of RFQ structures for the Lead Ion LINAC at CREN Corlett J N . Experience with cavity design programs . CERN Accelerator School RF Engineering for Accelerators , 1992 , 2 : 307 - 317 . Experience with cavity design programs Bricault P G , Joffe D , Schneider H R . RFQ cold model studies , in: Proceedings of IEEE PAC’95 , 1995 . RFQ cold model studies Podlech H , Ratzinger U , Gorelov D , et al . Electromagnetic design of an 80.5 MHz RFQ for the RIA driver Linac , in: Proceedings of EPAC 2002 , Paris, France , 942 - 944 . Electromagnetic design of an 80.5 MHz RFQ for the RIA driver Linac ZHANG Chuan . Research on high current radio frequency quadrupole accelerators for neutron production (in Chinese) . [D]. Beijing : Peking University , 2004 : 64 - 66 . Research on high current radio frequency quadrupole accelerators for neutron production (in Chinese) Schempp A , Vormann H , Beisel U , et al . The design of low frequency heavy ion RFQ resonators , in: Proceedings of IEEE PAC’95 , 1995 : 911 - 913 . The design of low frequency heavy ion RFQ resonators Fang J X , Schempp A . Equivalent circuit of a 4-rod RFQ , in: Proceedings of EPAC’92 , Berlin, Germany , March 1992 : 1331 - 1333 . Equivalent circuit of a 4-rod RFQ 10.13538/j.1001-8042/nst.20.277-280 2009-05-27 2009-10-20 2021-01-19 2009 Nuclear Science and Techniques 05 20