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Electron temperature probe onboard Japan's Mars orbiter

机译:日本火星探测器上的电子温度探测器

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摘要

Japan's first Mars spacecraft PLANET-B was successfully launched on 4th of July, 1998 and was named "NOZOMI" after the launch. One of the scientific instruments is a unique electron temperature probe which was developed in Japan and has been used for more than 20 years on sounding rockets as well as on scientific satellites (Oyama, 1991). The electron temperature probe dubbed PET (probe for Electron Temperature measurements)consists of two planar electrodes, 150 mm in diameter, placed at the edges of the two solar cell panels of the "NOZOMI" spacecraft. Electron temperatures can be measured in plasmas with densities exceeding 1000 cm~3 with sufficient accuracy. The maximum sampling rate of 8 data points per satellite spin for each probe allows high resolution measurements (i.e., an angular resolution around the spin axis of 23 degrees).Additionally, the probe can measure the anisotropy of the electron temperature, if it exists. It is also possible to infer the existence of nonthermal electrons.
机译:日本的第一枚火星飞船PLANET-B于1998年7月4日成功发射,发射后命名为“ NOZOMI”。科学仪器之一是在日本开发的独特的电子温度探头,在探测火箭和科学卫星上已经使用了20多年(Oyama,1991年)。被称为PET(电子温度测量探针)的电子温度探测器由两个直径为150 mm的平面电极组成,它们放置在“ NOZOMI”航天器的两个太阳能电池板的边缘。可以在密度超过1000 cm〜3的等离子体中以足够的精度测量电子温度。每个探测器每个卫星自旋的最大采样率为8个数据点,可实现高分辨率测量(即围绕自旋轴的角分辨率为23度),此外,该探头还可以测量电子温度的各向异性(如果存在)。也可以推断非热电子的存在。

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