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Title: Core tungsten radiation diagnostic calibration by small shell pellet injection in the DIII-D tokamak

Abstract

Injection of small (OD = 0.8 mm) plastic pellets carrying embedded smaller (10 μg) tungsten grains is used to check calibrations of core tungsten line radiation diagnostics in support of the 2016 tungsten rings campaign in the DIII-D tokamak. The total (1 eV – 10 keV) and soft x-ray (1 keV – 10 keV) brightnesses we observed were found to be reasonably well (< factor 2) predicted using existing calibration factors and rate calculations. Individual core (EUV/SXR) tungsten line brightnesses appear to be somewhat less reliable (factor 2-4) for prediction of core tungsten concentration.

Authors:
 [1];  [2];  [2];  [3];  [1];  [3];  [3];  [4]
  1. Univ. of California, San Diego, CA (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. General Atomics, San Diego, CA (United States)
  4. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Research Org.:
General Atomics, San Diego, CA (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE Office of Nuclear Energy (NE); USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1409370
Alternate Identifier(s):
OSTI ID: 1396637; OSTI ID: 1491628
Report Number(s):
LLNL-JRNL-752186
Journal ID: ISSN 0034-6748; TRN: US1703197
Grant/Contract Number:  
FC02-04ER54698; FG02-07ER54917; AC05-00OR22725; AC52-07NA27344
Resource Type:
Accepted Manuscript
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 88; Journal Issue: 10; Journal ID: ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; Physics - Plasma physics

Citation Formats

Hollmann, Eric M., Commaux, Nicolas, Shiraki, Daisuke, Alexander, Neil, Bykov, Igor, Moser, Auna L., Thomas, Dan M., and Victor, Brian S. Core tungsten radiation diagnostic calibration by small shell pellet injection in the DIII-D tokamak. United States: N. p., 2017. Web. doi:10.1063/1.5005170.
Hollmann, Eric M., Commaux, Nicolas, Shiraki, Daisuke, Alexander, Neil, Bykov, Igor, Moser, Auna L., Thomas, Dan M., & Victor, Brian S. Core tungsten radiation diagnostic calibration by small shell pellet injection in the DIII-D tokamak. United States. doi:10.1063/1.5005170.
Hollmann, Eric M., Commaux, Nicolas, Shiraki, Daisuke, Alexander, Neil, Bykov, Igor, Moser, Auna L., Thomas, Dan M., and Victor, Brian S. Wed . "Core tungsten radiation diagnostic calibration by small shell pellet injection in the DIII-D tokamak". United States. doi:10.1063/1.5005170. https://www.osti.gov/servlets/purl/1409370.
@article{osti_1409370,
title = {Core tungsten radiation diagnostic calibration by small shell pellet injection in the DIII-D tokamak},
author = {Hollmann, Eric M. and Commaux, Nicolas and Shiraki, Daisuke and Alexander, Neil and Bykov, Igor and Moser, Auna L. and Thomas, Dan M. and Victor, Brian S.},
abstractNote = {Injection of small (OD = 0.8 mm) plastic pellets carrying embedded smaller (10 μg) tungsten grains is used to check calibrations of core tungsten line radiation diagnostics in support of the 2016 tungsten rings campaign in the DIII-D tokamak. The total (1 eV – 10 keV) and soft x-ray (1 keV – 10 keV) brightnesses we observed were found to be reasonably well (< factor 2) predicted using existing calibration factors and rate calculations. Individual core (EUV/SXR) tungsten line brightnesses appear to be somewhat less reliable (factor 2-4) for prediction of core tungsten concentration.},
doi = {10.1063/1.5005170},
journal = {Review of Scientific Instruments},
number = 10,
volume = 88,
place = {United States},
year = {2017},
month = {10}
}

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Cited by: 1 work
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Figures / Tables:

Fig. 1 Fig. 1: (a) Schematic of pellet launcher, (b) top view of tokamak showing main diagnostics used here, and (c) x-ray image of small shell pellet.

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