丝偏心对圆柱形正比计数器性能的影响。

Effect of wire eccentricity on the performance of cylindrical proportional counters.

作者信息

Anachkova E, Roos H, Nekolla E, Kellerer A M

机构信息

Strahlenbiologisches Institut der Universitaet Muenchen, Schillerstrasse, Muenchen, Germany.

出版信息

Radiat Environ Biophys. 1995 Nov;34(4):245-9. doi: 10.1007/BF01209750.

DOI:10.1007/BF01209750

PMID:8749063

Abstract

A theoretical and experimental investigation of the influence of eccentricity of the multiplication wire on the performance of cylindrical proportional counters is presented. The electric field in the counter is calculated by the method of images, and the Townsend formalism is used to derive the gas gain. The experimental determination of detector performance is carried out with 37Ar. The dependence of the gas gain and of the counter resolution on eccentricity is discussed, and it is shown that eccentricities up to 0.2 are of no concern in microdosimetric measurements with cylindrical proportional counters.

摘要

本文对倍增丝偏心对圆柱形正比计数器性能的影响进行了理论和实验研究。利用镜像法计算计数器中的电场，并采用汤森形式理论推导气体放大倍数。使用³⁷Ar对探测器性能进行了实验测定。讨论了气体放大倍数和计数器分辨率对偏心的依赖性，结果表明，在使用圆柱形正比计数器进行微剂量测量时，偏心度高达0.2并不影响测量结果。