Dual transmission grating based imaging radiometer for tokamak edge and divertor plasmas

Deepak Kumar*, Daniel J. Clayton, Matthew Parman, Dan Stutman, Kevin Tritz, Michael Finkenthal

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

The designs of single transmission grating based extreme ultraviolet (XUV) and vacuum ultraviolet (VUV) imaging spectrometers can be adapted to build an imaging radiometer for simultaneous measurement of both spectral ranges. This paper describes the design of such an imaging radiometer with dual transmission gratings. The radiometer will have an XUV coverage of 20-200 Å with a ∼10 Å resolution and a VUV coverage of 200-2000 Å with a ∼50 Å resolution. The radiometer is designed to have a spatial view of 16°, with a 0.33° resolution and a time resolution of ∼10 ms. The applications for such a radiometer include spatially resolved impurity monitoring and electron temperature measurements in the tokamak edge and the divertor. As a proof of principle, the single grating instruments were used to diagnose a low temperature reflex discharge and the relevant data is also included in this paper.

Original languageEnglish
Article number10E511
JournalReview of Scientific Instruments
Volume83
Issue number10
DOIs
StatePublished - Oct 2012
Externally publishedYes

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