Effects of spatial non‐uniformity of streamer discharges on spectroscopic diagnostics of peak electric fields in transient luminous events
Effects of spatial non‐uniformity of streamer discharges on spectroscopic diagnostics of peak electric fields in transient luminous events
复制标题
流光放电的空间不均匀性对瞬态发光事件峰值电场光谱诊断的影响
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
V. Pasko
中科院分区：
文献类型：
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作者：
S. Celestin;V. Pasko
通过考虑具有不同能量激发阈值的波段系统的空间积分辐射强度之比，最近测量了瞬态发光事件（TLEs）中与流光放电相关的电场。Naidis（2009）最近的研究表明，由于拖缆头中电子密度和电场的强烈空间变化，这种测量可能导致对电场峰值的严重低估。对流光作为海拔高度、外加约化电场和流光极性的函数的建模分析表明，从分光光度数据中得到的基于比值的电场需要乘以校正因子>.0 .4，对于正流光和负流光，需要乘以校正因子>.0 .5，以获得电场的真实峰值。
The electric fields associated with streamer discharges in transient luminous events (TLEs) have been recently measured by considering the ratios of spatially integrated radiation intensities of band systems with different energy excitation thresholds. Following recent work by Naidis (2009) we demonstrate that due to strong spatial variations of the electron density and electric field in streamer heads such measurements may lead to a significant underestimation of the peak values of electric fields. The modeling analysis of streamers as a function of altitude, applied reduced electric field, and streamer polarity indicate that the ratios based electric fields derived from spectrophotometric data need to be multiplied by a corrective factor >1.4 for positive streamers and >1.5 for negative streamers, to obtain the true peak values of electric fields.