大体积多参数电离室

A Multi一Parameter Ionization Chamber with Large Volume

本文描述了用于重离子物理实验的一台大体积多参数现代电子脉冲电离室的结构、工作原理及用ａ源对其性能进行测试的结果。得到典型的能损△Ｅ分辨为１４３ｋｅＶ，典型的位置分辨△ｘ＝３ｍｍ和△ｙ＝３．５ｍｍ。用阴极感应电荷的电荷分除法进行ｘ位置读出是该电离室的特点之一。

The structure and operation principle Of a modern electron pulse ionization chamber withlarge volume used for heavy ion phySics have been described. Up to 50 parameters related tonuclear reaction products can be extracted from each. The detector has been tested by using a-source. Typical energy loss△E resolution of l43 keV (FWHM), position resolutions of △x=3mm(FWHM)and△y=3. 5mm(FWHM) have been obtained. One of the characteristics ofthe ionization chamber is that the x-position is read out by means of charge division of inducedcharge on the cathode of the single wire proprtional chamber。(