北京大学4.5MV静电加速器运行与改进

Operation and Improvement of 4.5 MV Van de Graaff Accelerator at Peking University

近两年来,北京大学4.5 MV单级静电加速器运行状况良好,主要的应用工作为中子核数据测量、中子照相和离子束材料辐照等。对加速器初聚系统和脉冲化电路进行了改进,直流束束流传输效率有较大提高,用飞行时间法测量了不同重复频率的脉冲中子谱。

4.5 MV Van de Graaff electrostatic accelerator at Peking University is running well in recent two years, and the applications mainly done are in the fields of neutron cross-section measurement, neutron radiography technique and research of radiation damage to different materials. The improvement of injection system has lift up ion beam transport efficiency increased the DC beam current obviously. Waveform of pulsed ion beams in different repetition rates was measured by neutron time of flight method after the extended progress in pulsing system circuits.