An experiment on thermionic emission: back to the good old triode
An experiment on thermionic emission: back to the good old triode
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热电子发射实验：回到古老的三极管
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
A. Azooz
中科院分区：
文献类型：
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作者：
A. Azooz
本文介绍了用三极管真空管研究热阴极热离子发射的简单实验、Richardson-Dushman方程和热阴极热离子电子的能量分布函数。指出当阳极电压为零时，这种分布函数与爱迪生阳极电流对三极管控制栅极电压的一阶导数成正比。得到的能量分布函数用费米-狄拉克定律比麦克斯韦-玻尔兹曼分布定律更能描述。
A simple experiment to study thermionic emission, the Richardson–Dushman equation and the energy distribution function of thermionic electrons emitted from a hot cathode using a triode vacuum tube is described. It is pointed out that such a distribution function is directly proportional to the first derivative of the Edison anode current with respect to the control grid voltage of the triode when the anode voltage is equal to zero. The energy distribution functions obtained are better described by the Fermi–Dirac law than by the Maxwell–Boltzman distribution law.