标题： Unilac高电流升级的操作方面 显示英文标题

标题： Operational Aspects of the High Current Upgrade at the Unilac

摘要： 随着新的GSI高流强注入器的使用，束流脉冲强度将增加两个数量级以上。 在粒子能量低于12 MeV/u时，高束流功率和短停止范围甚至可以在单个束流脉冲期间损坏加速器部件。 因此，整个加速器设施的操作需要在硬件、软件和操作策略方面进行重大更改。 一个复杂的束流诊断系统对于安全操作是必不可少的。 最好是安装非破坏性设备。 破坏性元件，例如束流阻挡器、狭缝、光阑等，进行了改进以承受高束流功率。 通过束流损失监测器比较和评估非常快速的束流电流变压器信号，实现了自动损伤预防。 此外，组件状态将被永久控制。 对于11.4 MeV/u的箔剥离，安装了磁束流扫掠系统。从而，在一个100微秒的脉冲期间，撞击区域将增加。 在操作过程中，必须减少手动参数调整。 设置和自动束流调整程序必须排除不受控制的束流损失。 通过在脉冲基础上可能的三束运行，UNILAC的多功能性得到了增强。 自1999年11月起，升级后的UNILAC正在为实验服务。 显示英文摘要

摘要： With the new GSI High Current Injector, the beam pulse intensity will be increased by more than two orders of magnitude. The high beam power and the short stopping range at particle energies below 12 MeV/u can destroy accelerator components even during a single beam pulse. Therefore, the operation of the whole accelerator facility has required major changes in hardware, software and operating strategy. A sophisticated beam diagnostic system is indispensable for a safe operation. Preferably non-destructive devices were installed. Destructive elements, e.g. beam stoppers, slits, apertures, were improved in order to withstand the high beam power. Automatic damage prevention was realised by beam loss monitors comparing and evaluating very fast beam current transformer signals. Additionally, the component status will be controlled permanently. For foil stripping at 11.4 MeV/u, a magnetic beam sweeping system was installed Thereby, the hit area will be increased during one 100 micro sec pulse. During operation, manual variation of parameters has to be reduced. Set-up and automatic beam adjustment procedures have to exclude uncontrolled beam loss. The versatility of the UNILAC is enhanced by the possible three-beam operation on a pulse-to-pulse basis. Since November 1999 the upgraded UNILAC is serving the experiments.