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Author Reusch, L. M. ♦ Den Hartog, D. J. ♦ Goetz, J. ♦ McGarry, M. B. ♦ Franz, P. ♦ Stephens, H. D.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY ♦ BESSY STORAGE RING ♦ CALIBRATION ♦ ELECTRON DENSITY ♦ ELECTRON MICROPROBE ANALYSIS ♦ ELECTRON TEMPERATURE ♦ ELECTRONS ♦ FILTERS ♦ SOFT X RADIATION ♦ TEMPERATURE MEASUREMENT ♦ THOMSON SCATTERING
Abstract The two-color soft x-ray (SXR) tomography diagnostic on the Madison Symmetric Torus is capable of making electron temperature measurements via the double-filter technique; however, there has been a 15% systematic discrepancy between the SXR double-filter (SXR{sub DF}) temperature and Thomson scattering (TS) temperature. Here we discuss calibration of the Be filters used in the SXR{sub DF} measurement using empirical measurements of the transmission function versus energy at the BESSY II electron storage ring, electron microprobe analysis of filter contaminants, and measurement of the effective density. The calibration does not account for the TS and SXR{sub DF} discrepancy, and evidence from experiments indicates that this discrepancy is due to physics missing from the SXR{sub DF} analysis rather than instrumentation effects.
ISSN 00346748
Educational Use Research
Learning Resource Type Article
Publisher Date 2016-11-15
Publisher Place United States
Journal Review of Scientific Instruments
Volume Number 87
Issue Number 11


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