Proportional chambers for very high counting rates based on gas mixtures of CF4 with hydrocarbons
Proportional chambers for very high counting rates based on gas mixtures of CF4 with hydrocarbons
复制标题
基于 CF4 与碳氢化合物的气体混合物的比例室可实现极高的计数率
DOI：
10.1016/0168-9002(85)90462-0
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发表时间：
1985
影响因子：
1.4
通讯作者：
P. Řehák
中科院分区：
文献类型：
--
作者：
J. Fischer;A. Hrisoho;V. Radeka;P. Řehák
非常快速的多丝正比室的低质量非常高的计数率的发展。阳极信号在脉冲整形后的有效持续时间为8 ns，时间抖动仅为4 ns fwhm。这种性能是在大气压下用CF4和碳氢化合物的气体混合物在具有小电极间距离的MWPC中实现的。具有高初级比电离密度和低噪声快速信号处理的气体混合物在几倍于104的气体增益下提供完全效率。在这些条件下，电离室可以以数倍于107 s −1cm−2的速率工作。各种气体混合物和腔室的几何形状进行了探讨和测试结果的报告。
Very fast multiwire proportional chambers of low mass for very high counting rates were developed. The anode signals have an effective duration of 8 ns after pulse shaping and a time jitter of only 4 ns fwhm. This performance was achieved with gas mixtures of CF4and hydrocarbons at atmospheric pressure in MWPCs with small interelectrode distances. Gas mixtures with high primary specific ionization density and low noise fast signal processing provide full efficiency at gas gains of a few times 104. At these conditions, the chambers can operate at rates of several times 107s−1cm−2. Various gas mixtures and chamber geometries were explored and test results are reported.