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从加速器运行的角度对兰州重离子加速器 HIRFL建成以来所存在的问题进行了总结 ,结合放射束物理和冷却储存环 CSR对 HIRFL的新要求 ,从加速器的物理设计方面提出了一些改进方案 .主要问题有 :超低能束流传输的空间电荷效应的影响 ,扇聚焦回旋加速器 SFC高频加速电压不对称对束流轨道的影响 ,用半频聚束的方式补偿两台回旋加速器的纵向不匹配 ,前束线上聚束器的工作模式的选取 ,强杂散磁场对超低能和低能束流传输的影响 ,分离扇回旋加速器 SSC注入区过垫补磁场对注入束流轨道的影响 ,SFC和 SSC的单圈引出 ,重离子通过剥离膜后的束流损失和束流品质的变坏等
From the perspective of accelerator operation, the problems existing since the HIRFL of Lanzhou heavy ion accelerator were summarized, and some improvements were proposed from the physical design of accelerator based on the new requirements of HIRFL for radiation physics and cooling storage CSR. The influence of the space charge effect of the ultra-low energy beam transmission, the influence of the high-frequency accelerating voltage asymmetry of the fan-focused cyclotron on the beam orbit, and the longitudinal mismatch of the two cyclotrons are compensated by means of the half- The influence of strong stray magnetic field on ultra-low energy and low-energy beam transport, the influence of over-padding magnetic field on the beam injection trajectory in SSC injection zone of segmented fan cyclotron, the influence of SFC and SSC Single lap lead, heavy ions through the stripping film beam loss and beam quality deterioration