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4MV静电加速器由高压系统、离子源及束流系统、控制系统和气体系统四部分组成。调试中出现了离子源不起弧、加速管破裂、控制系统失灵和输电带输电能力降低等技术问题,分析了出现这些问题的原因,然后分别采取了相应的措施加以解决:变换工作流程,在每次关机前先把引出电压降为零,开机时等离子源起弧后再把引出电压升到预定值;对过渡法兰进行车加工,重新封装;对高压端的控制设备采取屏蔽措施,在输入、输出端使用TVS二极管,对控制软件进行抗干扰设计;对绝缘气体进行循环干燥等。调试出了流强为100μA、能量在3MeV以上的稳定质子流。
4MV electrostatic accelerator from the high-pressure system, ion source and beam system, control system and gas system composed of four parts. During the commissioning, some technical problems such as non-arcing of ion source, rupture of accelerating tube, failure of control system and reduction of power transmission capacity of transmission line have been analyzed. The causes of these problems have been analyzed, and corresponding measures have been taken to solve the problems respectively. Before each turn off the lead-out voltage is reduced to zero, the plasma source starting when the plasma source and then the pull-out voltage rose to a predetermined value; the transitional flange for machining, re-packaging; high voltage side of the control equipment to take measures to shield the input , The output of the TVS diode, anti-jamming control software design; on the insulating gas circulation drying. Debug out a stable proton flow with a flow strength of 100 μA and energy above 3 MeV.