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A Hybrid single cavity (HSC) linac, which is formed by combining a radiofrequency quadrupole (RFQ) structure and a drift tube (DT) structure into oneinterdigital-H (IH) cavity, is fabricated and assembled as a proof of principle(PoP) type injector for cancer therapy synchrotron according to the seriesresearches. The injection method of the HSC linac adopt a direct plasmainjection scheme (DPIS), which is considered to be the only method foraccelerating an intense current heavy ion beam produced by a laser ion source(LIS). The input beam current of the HSC was designed to be 20 milliampere (mA)C6+ ions. According to numerical simulations, the HSC linac could accelerate a6-mA C6+ beam which meets requirement of the needed particle number for cancertherapy use (108~9 ions per pulse). The injection system adopted HSC injectorwith the method of DPIS can make the existing multi-turn injection system andthe stripping system unnecessary, and also can make the beam pipe of theexisting synchrotron magnets downsize which could reduce the whole cost ofsynchrotron (estimated millions dollars). Details of the measurements andevaluations of the assembled HSC linac, and the results of the high power testusing a LIS with DPIS are reported in this paper.

Successful High Power Acceleration of the HSC Type Injector for Cancer Therapy in IMP