Optimization of a Langmuir–Taylor detector for lithium
Optimization of a Langmuir–Taylor detector for lithium
复制标题
锂朗缪尔-泰勒探测器的优化
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
J. Gauyacq
中科院分区：
文献类型：
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作者：
R. Delhuille;A. Miffre;E. Lavallette;M. Buchner;C. Rizzo;G. Tr'enec;J. Vigu'e;H. Loesch;J. Gauyacq
本文介绍了一种使用Re带的锂的朗缪尔-泰勒探测器的结构和优化。测量了这种非常灵敏的探测器的绝对探测概率，并研究了该概率与氧分压和表面温度的关系。文中还详细讨论了背景信号的来源及其最小化。给出了探测器响应时间的数据与文献值的比较。理论分析表明，这种分析支持萨哈-朗缪尔定律将电离几率与功函数联系起来的正确性。最后，用化学平衡模型解释了功函数随氧压和温度的快速变化。
This article describes the construction and optimization of a Langmuir–Taylor detector for lithium, using a rhenium ribbon. The absolute detection probability of this very sensitive detector is measured and the dependence of this probability with oxygen pressure and surface temperature is studied. Sources of background signal and their minimization are also discussed in detail. A comparison between our data concerning the response time of the detector and literature values is given. A theoretical analysis has been made: this analysis supports the validity of the Saha–Langmuir law to relate the ionization probability to the work function. Finally, the rapid variations of the work function with oxygen pressure and temperature are explained by a chemical equilibrium model.