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Title: High-resolution tangential absolute extreme ultraviolet arrays for radiated power density measurements on NSTX-U

The radiated-power-density diagnostic on the equatorial midplane for the NSTX-U tokamak will be upgraded to measure the radial structure of the photon emissivity profile with an improved radial resolution. This diagnostic will enhance the characterization and studies of power balance, impurity transport, and MHD. The layout and response expected of the new system is shown for different plasma conditions and impurity concentrations. The effect of toroidal rotation driving poloidal asymmetries in the core radiation from high-Z impurities is also addressed.
Authors:
; ; ; ; ; ;  [1] ;  [2] ;  [3]
  1. Princeton Plasma Physics Laboratory, Princeton, New Jersey 08540 (United States)
  2. MIT Plasma Science and Fusion Center, Cambridge, Massachusetts 02139 (United States)
  3. The Johns Hopkins University, Baltimore, Maryland 21209 (United States)
Publication Date:
OSTI Identifier:
22303704
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 85; Journal Issue: 11; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ABUNDANCE; ASYMMETRY; EXTREME ULTRAVIOLET RADIATION; MAGNETOHYDRODYNAMICS; NSTX DEVICE; PHOTONS; PLASMA; PLASMA IMPURITIES; POLOIDAL FIELD DIVERTORS; POWER DENSITY; RESOLUTION