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Title: Mapping and uncertainty analysis of energy and pitch angle phase space in the DIII-D fast ion loss detector

Abstract

New phase space mapping and uncertainty analysis of energetic ion loss data in the DIII-D tokamak provides experimental results that serve as valuable constraints in first-principles simulations of energetic ion transport. Beam ion losses are measured by the fast ion loss detector (FILD) diagnostic system consisting of two magnetic spectrometers placed independently along the outer wall. Monte Carlo simulations of mono-energetic and single-pitch ions reaching the FILDs are used to determine the expected uncertainty in the measurements. Modeling shows that the variation in gyrophase of 80 keV beam ions at the FILD aperture can produce an apparent measured energy signature spanning across 50-140 keV. As a result, these calculations compare favorably with experiments in which neutral beam prompt loss provides a well known energy and pitch distribution.

Authors:
 [1];  [2];  [1];  [1]
  1. General Atomics, San Diego, CA (United States)
  2. Univ. of Hawaii, Hilo, HI (United States). Dept. of Physics
Publication Date:
Research Org.:
General Atomics, San Diego, CA (United States)
Sponsoring Org.:
USDOE Office of Nuclear Energy (NE)
OSTI Identifier:
1352918
Grant/Contract Number:  
FC02-04ER54698
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 85; Journal Issue: 11; 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

Citation Formats

Pace, D. C., Pipes, R., Fisher, R. K., and Van Zeeland, M. A. Mapping and uncertainty analysis of energy and pitch angle phase space in the DIII-D fast ion loss detector. United States: N. p., 2014. Web. doi:10.1063/1.4891596.
Pace, D. C., Pipes, R., Fisher, R. K., & Van Zeeland, M. A. Mapping and uncertainty analysis of energy and pitch angle phase space in the DIII-D fast ion loss detector. United States. doi:10.1063/1.4891596.
Pace, D. C., Pipes, R., Fisher, R. K., and Van Zeeland, M. A. Tue . "Mapping and uncertainty analysis of energy and pitch angle phase space in the DIII-D fast ion loss detector". United States. doi:10.1063/1.4891596. https://www.osti.gov/servlets/purl/1352918.
@article{osti_1352918,
title = {Mapping and uncertainty analysis of energy and pitch angle phase space in the DIII-D fast ion loss detector},
author = {Pace, D. C. and Pipes, R. and Fisher, R. K. and Van Zeeland, M. A.},
abstractNote = {New phase space mapping and uncertainty analysis of energetic ion loss data in the DIII-D tokamak provides experimental results that serve as valuable constraints in first-principles simulations of energetic ion transport. Beam ion losses are measured by the fast ion loss detector (FILD) diagnostic system consisting of two magnetic spectrometers placed independently along the outer wall. Monte Carlo simulations of mono-energetic and single-pitch ions reaching the FILDs are used to determine the expected uncertainty in the measurements. Modeling shows that the variation in gyrophase of 80 keV beam ions at the FILD aperture can produce an apparent measured energy signature spanning across 50-140 keV. As a result, these calculations compare favorably with experiments in which neutral beam prompt loss provides a well known energy and pitch distribution.},
doi = {10.1063/1.4891596},
journal = {Review of Scientific Instruments},
number = 11,
volume = 85,
place = {United States},
year = {Tue Aug 05 00:00:00 EDT 2014},
month = {Tue Aug 05 00:00:00 EDT 2014}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

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Cited by: 2 works
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