利用大型螺旋装置（LHD）上20千赫兹的高重复频率激光通过汤姆逊散射测量电子温度和密度。

Electron temperature and density measurement by Thomson scattering with a high repetition rate laser of 20 kHz on LHD.

作者信息

Funaba H, Yasuhara R, Uehara H, Yamada I, Sakamoto R, Osakabe M, Den Hartog D J

机构信息

National Institute for Fusion Science, National Institutes of Natural Sciences, Toki, Gifu, 509-5292, Japan.

Department of Physics, University of Wisconsin-Madison, Madison, WI, 53706-1390, USA.

出版信息

Sci Rep. 2022 Sep 6;12(1):15112. doi: 10.1038/s41598-022-19328-9.

DOI:10.1038/s41598-022-19328-9

PMID:36068266

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9448754/

Abstract

Thomson scattering measurements with a high-repetition-rate laser have commenced in the Large Helical Device. As an example of the fast phenomena captured by this diagnostic system, measurements at a 20 kHz repetition-rate in hydrogen pellet-injected plasmas are presented. Signal processing methods for this measurement have been developed and electron temperature profiles with almost 70 spatial points were evaluated at time intervals of 50 [Formula: see text]s. After Raman scattering calibration, electron density profiles were derived. Fast changes in the electron temperature and density profiles within 1 ms were observed.

摘要

在大型螺旋装置中已开始使用高重复率激光进行汤姆逊散射测量。作为该诊断系统所捕获的快速现象的一个例子，展示了在氢弹丸注入等离子体中以20千赫重复率进行的测量。已开发出用于此测量的信号处理方法，并在50微秒的时间间隔内评估了具有近70个空间点的电子温度剖面。经过拉曼散射校准后，得出了电子密度剖面。观察到在1毫秒内电子温度和密度剖面的快速变化。