Soft x-ray continuum radiation transmitted through metallic filters: An analytical approach to fast electron temperature measurements a

摘要

A new set of analytic formulas describes the transmission of soft x-ray continuum radiation through a metallic foil for its application to fast electron temperature measurements in fusion plasmas. This novel approach shows good agreement with numerical calculations over a wide range of plasma temperatures in contrast with the solutions obtained when using a transmission approximated by a single-Heaviside function [ S. von Goeler et al., Rev. Sci. Instrum. 70, 599 (1999) ]. The new analytic formulas can improve the interpretation of the experimental results and thus contribute in obtaining fast temperature measurements in between intermittent Thomson scattering data. © 2010 American Institute of Physics Article Outline MOTIVATION BACKGROUND ANALYTIC SOLUTIONS Heaviside approximations Asymptotic integration