Enhancement of thermionic emission by light

Enhancement of thermionic emission by light
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光增强热电子发射

DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
R. Mishra
R. Mishra
中科院分区：
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文献类型：
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作者：
M. Sodha;S. Srivastava;R. Mishra

文献摘要

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本文根据金属的自由电子理论和福勒光电电子发射理论，计算了受光照的热金属板的电子发射速率。考虑了高能电子（在入射频率低于阈值的光子的作用下，其正能量在表面得到增强而不被发射）对板内电子能量分布的改变（或电子温度的提高）。对辐照增强的电子温度对热离子电流的影响进行了评价。研究结果可能适用于由Schwede等人提出的热离子转换器施维德，B.E.哈丁，S.J.罗森塔尔，孙杨，F. Schmitt， P. Pianette， R.T. Howe，沈正哲，N.A. Melosh, Nat Mater. 9, 762（2010）。给出了数值结果并进行了讨论。
In this paper the rate of electron emission from an illuminated hot metallic plate has been evaluated on the basis of the free electron theory of metals and Fowler’s theory of photoelectric electron emission. The modification of the electron energy distribution (or enhancement of electron temperature) in the plate by energetic electrons (which get their normal energy enhanced on the surface by incident photons of frequency below threshold and are not emitted) has been taken into account. The thermionic current as modified by the electron temperature so enhanced by irradiation has been evaluated. The results may be applicable to thermionic convertors, as proposed to be operated by Schwede et al. [J.W. Schwede, I. Bargatin, D.C. Riley, B.E. Hardin, S.J. Rosenthal, Y. Sun, F. Schmitt, P. Pianette, R.T. Howe, Z. Shen, N.A. Melosh, Nat. Mater. 9, 762 (2010)]. Numerical results have been presented and discussed.