High‐resolution electron temperature measurements using the plasma line asymmetry
High‐resolution electron temperature measurements using the plasma line asymmetry
复制标题
利用等离子体线不对称性进行高分辨率电子温度测量
DOI：
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复制
发表时间：
2006
期刊：
影响因子：
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通讯作者：
L. Paxton
中科院分区：
文献类型：
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作者：
L. Goembel;J. P. Doering;D. Morrison;L. Paxton
在本文中，我们提出了一种新的技术测量电子温度在白天电离层使用阿雷西博非相干散射雷达（ISR）的第一个结果。该技术利用等离子体线的非相干散射光谱的组成部分。上下移动的等离子体线频率的差异与电离层的密度和温度有关，以及由光电子，电流和其他来源引起的更小的影响。该偏移非常小（在几MHz的等离子体线频率中为1 kHz的量级），但是可以用编码长脉冲等离子体线技术相当精确地测量。我们将结果与电子温度的离子线测量进行了比较，两种独立的技术显示出良好的一致性。除了提供一个测量的电子温度是独立的离子线，该方法允许一个敏感的测试动力学等离子体理论，包括磁场，给我们的能力来研究光电子种群和电子电流，并将使我们能够约束离子线拟合在底部（可能顶侧）区域，以更准确地适合组合物。
In this paper, we present the first results of a new technique for measuring the electron temperature in the daytime ionosphere using the Arecibo incoherent scatter radar (ISR). The technique utilizes the plasma line component of the incoherent scatter spectrum. The difference in the up‐ and down‐shifted plasma line frequencies is related to the density and temperature of the ionosphere, as well as more minor effects resulting from photoelectrons, currents, and other sources. The shift is very small (the order of 1 kHz in a plasma line frequency of several MHz) but can be measured quite accurately with the coded long pulse plasma line technique. We compare the results to ion line measurements of the electron temperature, and the two independent techniques show good agreement. In addition to providing a measure of the electron temperature that is independent of the ion line, the approach allows for a sensitive test of kinetic plasma theory including a magnetic field, gives us the ability to study photoelectron populations and electron currents, and will allow us to constrain ion line fits in the bottomside (and possibly topside) regions to more accurately fit for composition.