The electron energy distribution during HF pumping, a picture painted with all colors
The electron energy distribution during HF pumping, a picture painted with all colors
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DOI：
10.5194/angeo-23-1747-2005
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发表时间：
2005-01-01
影响因子：
1.9
通讯作者：
Holma, H
中科院分区：
文献类型：
--
作者：
Gustavsson, B;Sergienko, T;Holma, H
电子能量分布的形状长期以来一直是高频无线电诱导光发射实验领域的中心问题。本报告基于光学多波长（6300、5577、8446、4278 A）数据和 930 MHz 非相干散射雷达对离子温度、电子温度和电子浓度的测量，介绍了从 0 到 60eV 的电子能量分布函数 f(e)(E) 的估计值。根据我们的估计，电子能量分布在 2 eV 左右有一个凹陷，这可能是由 N-2 中振动态的电子激发引起的，并且有一个明显超热的高能尾。发射的时间演化表明电子温度在为电子提供接近 2 eV 的能量方面仍然发挥着重要作用。在较高能量下，电子能量分布具有非热尾。
The shape of the electron energy distribution has long been a central question in the field of high frequency radio-induced optical emission experiments. This report presents estimates of the electron energy distribution function, f(e)(E), from 0 to 60eV, based on optical multi-wavelength (6300, 5577, 8446, 4278 A) data and 930-MHz incoherent scatter radar measurements of ion temperature, electron temperature and electron concentration. According to our estimate, the elect-on energy distribution has a depression at around 2 eV, probably caused by electron excitation of vibrational states in N-2, and a high energy tail that is clearly supra-thermal. The temporal evolution of the emissions indicates that the electron temperature still plays an important role in providing electrons with energies close to 2 eV. At the higher energies the electron energy distribution has a nonthermal tail.