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

TL;DR

This paper reports the successful high-power acceleration of a hybrid single cavity (HSC) linac, demonstrating its potential as an efficient, cost-effective injector for cancer therapy synchrotrons using direct plasma injection with laser ion sources.

Contribution

It introduces a novel HSC linac design combined with DPIS for cancer therapy, showing high-power acceleration and potential cost savings.

Findings

HSC linac successfully accelerated a 6-mA C6+ beam.

The system can meet the particle number requirements for cancer therapy.

High power testing confirmed the linac's performance and feasibility.

Abstract

A Hybrid single cavity (HSC) linac, which is formed by combining a radio frequency quadrupole (RFQ) structure and a drift tube (DT) structure into one interdigital-H (IH) cavity, is fabricated and assembled as a proof of principle (PoP) type injector for cancer therapy synchrotron according to the series researches. The injection method of the HSC linac adopt a direct plasma injection scheme (DPIS), which is considered to be the only method for accelerating 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 a 6-mA C6+ beam which meets requirement of the needed particle number for cancer therapy use (108~9 ions per pulse). The injection system adopted HSC injector with the method of DPIS can make the existing multi-turn injection system and the stripping system unnecessary, and also can make the beam pipe of the existing synchrotron magnets downsize which could reduce the whole cost of synchrotron (estimated millions dollars). Details of the measurements and evaluations of the assembled HSC linac, and the results of the high power test using a LIS with DPIS are reported in this paper.