H− laser photodetachment at 1064, 532, and 355 nm in plasma
H− laser photodetachment at 1064, 532, and 355 nm in plasma
复制标题
等离子体中 1064、532 和 355 nm 的 H− 激光光脱离
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
M. Bacal
中科院分区：
文献类型：
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作者：
M. Nishiura;M. Sasao;M. Bacal
利用Nd钇铝石榴石激光器的基频（1064 nm）、二次谐波（532 nm）和三次谐波（355 nm）研究了光解离电子能量对氢等离子体中H-密度和H-漂移速度测定的影响。其中电子密度和温度的范围分别为1010 cm-3至1011 cm-3和0.5至3 eV，n-/ne比小于2%。从δIp−Vp特性，其中δIp是光剥离电流，Vp是探测电压，发现光剥离电子的能量不依赖于光子能量。光剥离电子的有效温度Teff接近背景电子的有效温度，在40%以内。因此，H−密度和H−漂移速度不受光子能量的影响。
The fundamental frequency (1064 nm), the second harmonic (532 nm), and the third harmonic (355 nm) of a Nd yttrium aluminum garnet laser have been used to investigate the influence of the energies of photodetached electrons upon the determination of the H− density and the H− drift velocity in a hydrogen plasma, where the electron density and temperature range from 1010 cm−3 to 1011 cm−3 and from 0.5 to 3 eV, respectively, with the n−/ne ratio less than 2%. From the δIp−Vp characteristics, where δIp is the photodetachment current and Vp is the probe voltage, it is found that there is no dependence of the energies of photodetached electrons on the photon energies. The effective temperature of photodetached electrons Teff is close, within 40%, to that of background electrons. As a result the H− density and the H− drift velocity are not affected by photon energies.