| Ar+CH4混合气体中电子漂移速率的双栅法测量 |
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| 引用本文： | 张家国,张国辉,陈金象.Ar+CH4混合气体中电子漂移速率的双栅法测量[J].原子能科学技术,2008,42(8):691-696. |
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| 作者姓名： | 张家国 张国辉 陈金象 |
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| 作者单位： | 北京大学 ;物理学院 ;重离子物理研究所和核物理与核技术国家重点实验室，北京 ; 100871 |
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| 基金项目： | 国家自然科学基金，中国-俄罗斯合作项目 |
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| 摘 要： | 提出了一种快速、准确测量电子在气体中漂移速率的新方法。通过分析电子在双栅电离室中两个栅极上产生的感应信号波形来确定电子漂移的起止时刻，从而得出电子在一定约化场强下的漂移速率。采用数据采集卡（waveformdigitizer）对电离室的极板信号进行记录。测量了电子在8种混合比例的Ar+CH4气体中漂移速率随约化场强的变化曲线。通过分析实验数据，得到任意混合比例的Ar+CH4气体中电子漂移速率的计算公式。
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| 关 键 词： | 电子漂移速率 双栅电离室 数据采集卡 |
| 收稿时间： | 2008-03-27 |
| 修稿时间： | 2008-05-09 |
Measurement of Electron-Drift Velocity in Ar+CH4 Mixtures With Double-Grid Method |
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| ZHANG Jia-guo,ZHANG Guo-hui,CHEN Jin-xiang.Measurement of Electron-Drift Velocity in Ar+CH4 Mixtures With Double-Grid Method[J].Atomic Energy Science and Technology,2008,42(8):691-696. |
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| Authors: | ZHANG Jia-guo ZHANG Guo-hui CHEN Jin-xiang |
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| Affiliation: | State Key Laboratory of Nuclear Physics and Technology, Institute of Heavy Ion Physics, School of Physics, Peking University, Beijing 100871, China |
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| Abstract: | A new method for rapidly and accurately measuring the electron-drift velocity was described in detail. This method is based on analyzing the induced signals of double grid of an ionization chamber to determine the electron-drift time between the two grids. The waveform digitizer was employed to record pulses from the two grids of the ionization chamber. The electron -drift velocity was measured as the function of the reduced electric field for 8 different ratios of argon methane mixtures. A formula for calculating electron-drift velocity in any ratio of argon methane mixtures was presented. |
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| Keywords: | electron-drift velocity double-grid ionization chamber waveform digitizer |
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