Pyroelectric and photogalvanic crystal accelerators
Pyroelectric and photogalvanic crystal accelerators
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热释电和光电晶体加速器
DOI：
10.1063/1.3159903
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
J. Wang
中科院分区：
文献类型：
--
作者：
N. Kukhtarev;T. Kukhtareva;G. Stargell;J. Wang
在这项研究中，我们推导出方程的热释电和光电流贡献的光敏铁电晶体的充电。标准的光折变方程的补充状态方程的偏振密度的Devonshire-Ginsburg-朗道（DGL）的方法。考虑了宽强度范围内的光电流电压和电流，其中包括杂质完全电离时和传统线性复合方法无效时的连续光激发和高强度脉冲光激发。晶体静电加速器，基于铁电晶体的热电和光电效应充电，讨论了自聚焦电子束，x射线和中子的产生。
In this study, we have derived equations for the pyroelectric and photogalvanic contribution to the electrical charging of the photosensitive ferroelectric crystal. Standard photorefractive equations are supplemented by the equation of state for the polarization density following the Devonshire–Ginsburg–Landau (DGL) approach. The photogalvanic voltage and current is considered for a wide intensity range, which includes the cw and the pulsed photoexcitation with high intensities when the impurity is fully ionized and when the traditional linear-recombination approach is not valid. The crystal electrostatic accelerators, based on charging of ferroelectric crystals by pyroelectric and photogalvanic effects, are discussed in relation to the generation of the self-focused electron beam, x rays, and neutrons.