低压多丝正比室的位置分辨研究

Study on Position Resolution of Low Pressure Multi-wire Proportional Chambers

低压多丝正比室为放射性束核反应的靶前粒子提供位置和时间信号。本工作用241Amα源研究电压、工作气体压强等因素对低压多丝正比室位置分辨的影响。实验结果表明:在不同的气体压强条件下,低压多丝正比室的位置分辨均可达到1 mm,但考虑到时间、效率等因素,实验中需尽可能提高气压。

Low pressure multi-wire proportional chamber（LPMWPC） provides excellent position and time signals for the radioactive beam induced reactions. By using the ^241 Am α source, the influencing conditions on the position resolution, including the voltage and the working gas pressure（800-1 330 Pa）, were studied. The best position resolutions at different gas pressures are less than 1 mm. Considered the time resolution and detection efficiency, it is necessary to make the gas pressure as high as possible.