Plasma and Fusion Research

Volume 13, 3402049 (2018)

Regular Articles

Plasma Density Measurement on an SCU-PSI Device via a CO2 Dispersion Interferometer
Haoxi WANG1,2), Yan ZHOU1), Fujun GOU3), Yuan LI1), Hongbin WANG4), Xianjun ZHENG4) and Yonggao LI1)
1)
Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China
2)
Department of Engineering Physics, Tsinghua University, Beijing 10084, China
3)
Sichuan University, Chengdu 610064, China
4)
Hope Innovation (Shanghai) Inc., Shanghai, China
(Received 27 November 2017 / Accepted 12 March 2018 / Published 10 May 2018)

Abstract

A new CO2 dispersion interferometer (DI) was commissioned on the linear device at Sichuan University for the plasma surface interaction (SCU-PSI) [1]. The SCU-PSI device can generate a plasma pulse with very high density and a short duration. The DI system measured the plasma densities in several plasma discharges with rapid density changes. The results show a high correlation to other diagnostics such as the plasma current signal measured using a Rogowski coil. The line-density resolution of the system is 6.3 × 1017/m2. The time resolution is 0.05 ms.

Keywords

linear device, interferometer, dispersion interferometer, photoelastic modulator, pulse discharge

DOI: 10.1585/pfr.13.3402049

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