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为在放射性束流线上进行核反应研究而研制了灵敏面积为50mm×50mm的二维位置灵敏的低气压多丝正比室。低气压多丝正比室为穿透式,在真空中使用,工作气压为800Pa,透射性好,不干扰束流。放射性束流在束测试结果表明:它的x、y方向的位置双径迹分辨为1mm;对30～40MeV的低Z放射性束的探测效率大于80%,适用于中能次级束实验中入射束的定位和反应中产生的带电粒子出射角度的测量。
A two-dimensional position-sensitive, low-pressure multi-filament proportional cell with a sensitive area of 50 mm × 50 mm was developed for nuclear reaction studies on radioactive beam lines. Low-pressure multi-wire proportional room for the penetration type, used in a vacuum, the working pressure of 800Pa, good transmission, does not interfere with the beam. The results of the radioactive beam show that the detection of the double track in the x and y directions is 1mm and the detection efficiency of the low Z radioactive beam of 30-40MeV is more than 80% Beam positioning and reaction of charged particles generated in the measurement of the angle of emergence.