紧凑型强流重离子CH型漂移管直线加速器动力学设计

Dynamics Design on a Compact High Intensity Heavy-ion CH-DTL

摘要: 基于KONUS动力学设计理论，完成了一台工作在脉冲模式的紧凑型常温交叉杆型漂移管直线加速器(CH-DTL)的束流动力学设计，并对关键问题进行了深入研究。该脉冲直线加速器工作频率选为325 MHz，内含29个加速间隙，动力学长度为1.3 m，可以将^12\rmC^5+重离子束流能量由1 MeV/u提高至4 MeV/u。对有利于提高装置紧凑性的基本参数，如工作频率、加速电压、K_p值等进行了理论分析和研究。动力学模拟结果显示，粒子在DTL段传输效率大于99%，输出束团相宽约为20°，能量分散小于\pm 1\text%。

Abstract: In this paper, based on the KONUS dynamics theory, the beam dynamics design of a compact room-temperature cross-bar drift tube linear accelerator(CH-DTL) operating in pulsed mode is completed, and the key issues are carefully investigated. This DTL operates at 325 MHz, contains 29 acceleration gaps, and has a dynamics length of 1.3 m. It can accelerate ^12\rmC^5+ heavy ion beam energy from 1 to 4 MeV/u. The essential parameters that contribute to the compactness of the device, such as operating frequency, voltage, and K_p value, are analyzed and studied theoretically. The simulation results show that the transmission efficiency in the DTL section is greater than 99%, the phase width of the output bunch is about 20°, and the energy spread is less than \pm 1\text%.