摘要
北京大学新建成的单级静电加速器端电压在0．4—4．5MV范围内连续可调，稳定度在±1kV左右，可以加速氢、氘等轻离子及碳至氩等多电荷重离子，分析流强可到15—2μA（质子氘离子），建有两条束流输运线，能量分辨率分别可到1．3±10-3和4．2×10-4，传输效率高于90％，在加速器高压电极内有速流脉冲化装置，可在靶上提供脉冲宽度约1．6ns、平均流强1μA、重复频率为3MHz的脉冲束流。该器目前主要用于中子实验工作。
A 4. 5MV single end electrostatic accelerator was finished and has been operated over 2500 hours. The terminal voltage has reached 4. 5MV with stability about f lkV. The RF ion source and PlG ion source used in this machine can produce from hydrogen to argon ions for acceleration and give analyzed beam currents for H+ and d+ about 15 2OpA. Two beam lines have beem setup with transport efficiency over 90% and energy resolution about 1. 3 × 10-3 and 4. 2×10-4respectively. A Klystron bunching facility has been incorporated into the top terminal and pulsed ion heam at the target with pulse width about 1. 6ns; mean currents lμA at 3MHz repetition rate. 40 Ca (n, α)37Ar, 53 Ni (n,α)55Fe reaction cross sections e. t. c. have been measured
出处
《现代科学仪器》
1995年第2期9-12,共4页
Modern Scientific Instruments
