Spectroscopic Diagnostics of Radiation Reabsorption in Dense He Arc Plasmas

Md Anwarul Islam and Shinichi Namba
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Md Anwarul Islam: Japan Bangla Bridge Research Center, Bangladesh The Institution of Engineers, Bangladesh
Shinichi Namba: Hiroshima University, Japan

International Journal of Research and Innovation in Applied Science, 2024, vol. 9, issue 7, 194-201

Abstract: Observing the light emission from plasmas spectroscopically allows for the determination of key plasma parameters like electron temperature, density and external field. This method, known as plasma spectroscopy, serves as a non-intrusive diagnostic tool to study plasma dynamics. However, overlooking the impact of radiation reabsorption in the typical analytic model may compromise the accuracy of observed plasma behavior. This study addresses the influence of radiation reabsorption on plasma spectroscopic diagnosis, focusing on linear divertor simulators and plasma spectrometers designed for high-density Large Helical Device (LHD) plasmas, where optical thickness cannot be disregarded. The discussion delves into understanding the effects of radiation reabsorption in these observations.

Date: 2024
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