A particle-in-cell mode beam dynamics simulation of medium energy beam transport for the SSC-Linac

• Published in: Chinese physics C Vol. 36; no. 1; pp. 84 - 90
• Main Author: 肖陈 何源 原有进 陆元荣 刘勇 王志军 杜小楠 姚庆高 刘戈 徐孟鑫 贺守波 夏佳文
• Format: Journal Article
• Language: English
• Published: IOP Publishing 2012
• Subjects: Acceptance; Beams (radiation); Dynamics; Linear accelerators; Particle in cell technique; Quadrupoles; Simulation; Three dimensional; Transport; 中能; 兰州重离子加速器; 动力学模拟; 医疗技术; 束流传输; 直线加速器; 粒子束; 细胞
• ISSN: 1674-1137; 2058-6132; 0254-3052; 2058-6132
• DOI: 10.1088/1674-1137/36/1/015

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.