Mapping and uncertainty analysis of energy and pitch angle phase space in the DIII-D fast ion loss detector
- General Atomics, San Diego, CA (United States)
- Univ. of Hawaii, Hilo, HI (United States). Dept. of Physics
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.
- Research Organization:
- General Atomics, San Diego, CA (United States)
- Sponsoring Organization:
- USDOE Office of Nuclear Energy (NE)
- Grant/Contract Number:
- FC02-04ER54698
- OSTI ID:
- 1352918
- Journal Information:
- Review of Scientific Instruments, Vol. 85, Issue 11; ISSN 0034-6748
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Diverse wave-particle interactions for energetic ions that traverse Alfvén eigenmodes on their first full orbit
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journal | February 2016 |
Velocity-space sensitivity and tomography of scintillator-based fast-ion loss detectors
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journal | August 2018 |
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