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.

已经进行了这项研究，以实现激光光谱方法的最终性能，以测量等离子体和气体中电场的测量。即（i）促进在发光排放等离子中的电场的测量，不仅构成他，而且还构成其他原子，例如AR，以及（ii）追求大气中电场测量的可能性。对这些测量的需求很大。结果如下1。已经对AR原子的Stark效应进行了首次光谱研究，并得出了非常有用的信息。这包括对电场敏感的Rydberg水平的澄清，以及电场和Stark Shifts量之间的关系（下面项目11中的第二篇文章）。2。已经表明，电场的方向可以通过使用激光器的极化（下面的第11项中的第三条）来决定。3。两步激光诱导的荧光的适用范围已经阐明，尤其是对于他和Ar.4等原子。为了测量雷云下的电场和大气中的屏障排放，已经测试了AR原子的三个光子激发，这是该开发的关键技术。结果产生了容易填充的水平，从而实现了未来的发展。