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Energy resolution in ionization chamber filled with liquefied rare gases at an elevated temperature.

高温下充满液化稀有气体的电离室中的能量分辨率。

基本信息

批准号：
06640536
负责人：
SHIBAMURA Eido
金额：
$ 1.34万
依托单位：
Saitama College of Health
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1994
资助国家：
日本
起止时间：
1994 至 1995
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06640536/
关键词：
Energy Resolution Ionization liquid Argon Liquid Xenon Euergy Resolution Liquid Argon Liquid Xeuon ionization chawber ionization

项目摘要

Ionization chambers filled with liquefied rare gases exhibit good energy resolution and good linearity of output signals to the deposited energy. For example, liquid argon calorimeters have been used in high physics experiments. Theoretically, however, far better energy resolution is expected than those experimentally obtained. The purpose of the present work is to obtain the excellent energy resolution as expected by the theory, or to investigate the disagreement of the theory and the experiment on the energy resolution.We investigated the energy resolution in ionization chambers filled with liquefied rare gases doped with photo-ionizing molecules. We found that the energy resolution is improved by doping liquid rare gases with photo-ionizing molecules only at relatively low electric fields and that the improvement is little at high fields, in contrast to the estimation based on the 'Recombination model' proposed by Thomas et al. We concluded that the 'Recombination model' is not the case [1]. Investigating the ionization yield and scintillation yield in liquefied rare gases, we made a comment [2] on a paper by Seguinot et al. As a typical case of high ionization density, we studied the ionization yield and the energy resolution for relativestic heavy ions in liquid argon calorimeter doped with photo-ionizing molecules [3].The excellent energy resolution as expected by the theoretical estimation is not obtained so far. We, however, have improved the experimental apparatus such as purifier of rare gases. We would like to make more experiments by using improved electronics system.

填充有液化稀有气体的电离室表现出良好的能量分辨率和输出信号与沉积能量的良好线性。例如，液态氩量热计已被用于高物理实验。然而，从理论上讲，更好的能量分辨率预计比实验获得的。为了获得理论所期望的高能量分辨率，或者为了研究理论和实验在能量分辨率上的分歧，本文研究了在填充有掺杂光致电离分子的液化稀有气体的电离室中的能量分辨率。我们发现，只有在相对较低的电场下，通过在液态稀有气体中掺杂光致电离分子才能提高能量分辨率，而在高电场下，这种提高很小，这与托马斯等人提出的基于“蒸发模型”的估计相反。我们得出结论，“蒸发模型”不是这种情况[1]。在研究液化稀有气体的电离产额和闪烁产额时，我们对Seguinot等人的文章[2]进行了评述。作为高电离密度的典型情况，我们研究了掺杂光电离分子的液氩量热计中相对论重离子的电离产额和能量分辨率[3]，迄今为止，还没有得到理论估计所期望的优良的能量分辨率。我们改进了稀有气体净化器等实验装置。我们希望通过使用改进的电子系统进行更多的实验。