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Achievement of Ultimate Performances of Laser Spectroscopic Methods for Measurements of Electric Fields in Plasmas and Gases

实现等离子体和气体电场测量激光光谱方法的终极性能

基本信息

批准号：
12480122
负责人：
MURAOKA Katsunori
金额：
$ 1.54万
依托单位：
KYUSHU UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2001
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12480122/
关键词：
plasma electric field laser spectroscopy Stark effect ultimate performance 気体シュタルクライダー

项目摘要

This research has been carried out to achieve ultimate performances of laser spectroscopic methods for measurements of electric fields in plasmas and gases ; namely (i) to facilitate measurements of electric fields in glow discharge plasmas constituting not only He but other atoms such as Ar, and (ii) to pursue possibility of electric field measurements in atmosphere. There have been great demands for these measurements.Obtained results are as follows.1. The first spectroscopic study of the Stark effect for Ar atoms has been conducted, and yielded very useful information. This includes the clarification of Rydberg levels which are sensitive to electric fields, and of the relationship between the electric fields and the amounts of Stark shifts (the second article in the item 11 below).2. It has been shown that the direction of an electric field can be decided by the use of the polarization of a laser (the third article in the item 11 below).3. Applicable ranges of the two-step laser induced fluorescence have been clarified, especially for atoms such as He and Ar.4. In order to measure electric fields under thunderclouds and in barrier discharges in atmosphere, the three photon excitation of Ar atoms, which is the key technology for the development, has been tested. The results have yielded the levels which are easily populated, thus enabled future developments.

这项研究已经进行，以实现最终的性能的激光光谱法测量电场的等离子体和气体，即（i）促进辉光放电等离子体中的电场的测量不仅包括他，但其他原子，如Ar，和（ii）追求在大气中的电场测量的可能性。这些测量的需求量很大，得到的结果如下：1.首次对Ar原子的斯塔克效应进行了光谱研究，得到了非常有用的信息。这包括对电场敏感的里德伯能级的澄清，以及电场和斯塔克位移量之间的关系（下文第11项中的第二篇文章）。2.已经证明，电场的方向可以通过使用激光的偏振来决定（下面第11项中的第三条）。3.阐明了两步激光诱导荧光的适用范围，特别是对He和Ar等原子。为了测量雷暴云下和大气阻挡放电中的电场，对研制中的关键技术--Ar原子三光子激发进行了实验研究。结果产生了易于填充的水平，从而使未来的发展成为可能。