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Title: Simulation of neutron emission in neutral beam injection heated plasmas with the real-time code RABBIT

Abstract

In plasmas heated with deuterium beams a deficit of the expected fusion neutron rate is an indicator of the deterioration of the fast-ion confinement, caused, for instance, by magnetohydrodynamic instabilities. The capability of predicting this deficit during the discharge relies on the availability of real-time estimates of the neutron rate from NBI codes which must be fast and accurate at the same time. Therefore, the recently developed real-time RABBIT code for NBI simulations has been extended to output the distribution function and calculate the neutron emission. After the description of this newly installed diagnostics in RABBIT, benchmarks with NUBEAM, a massively used and validated Monte Carlo NBI solver, are discussed on ASDEX-Upgrade and JET cases. A first application for control-room intershot analysis on DIII-D is presented, and the results are compared on a large database with a slower NUBEAM analysis. Further application possibilities, e.g. for real-time control of Alfvén eigenmodes, are outlined.

Authors:
 [1];  [1];  [2]; ORCiD logo [3]; ORCiD logo [3]; ORCiD logo [2]
  1. Max-Planck-Inst. für Plasmaphysik, Garching (Germany)
  2. General Atomics, San Diego, CA (United States)
  3. Univ. of California, Irvine, CA (United States). Dept. of Physics and Astronomy
Publication Date:
Research Org.:
U.S. Department of Energy (USDOE), Washington D.C. (United States)
Sponsoring Org.:
USDOE
Contributing Org.:
ASDEX Upgrade; DIII-D team; Eurofusion MST1 team; JET Contributors
OSTI Identifier:
1565956
Grant/Contract Number:  
FC02-04ER54698
Resource Type:
Accepted Manuscript
Journal Name:
Nuclear Fusion
Additional Journal Information:
Journal Volume: 59; Journal Issue: 8; Journal ID: ISSN 0029-5515
Publisher:
IOP Science
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Weiland, M., Bilato, R., Collins, C. S., Heidbrink, W. W., Liu, D., and Van Zeeland, M. A. Simulation of neutron emission in neutral beam injection heated plasmas with the real-time code RABBIT. United States: N. p., 2019. Web. doi:10.1088/1741-4326/ab1edd.
Weiland, M., Bilato, R., Collins, C. S., Heidbrink, W. W., Liu, D., & Van Zeeland, M. A. Simulation of neutron emission in neutral beam injection heated plasmas with the real-time code RABBIT. United States. doi:10.1088/1741-4326/ab1edd.
Weiland, M., Bilato, R., Collins, C. S., Heidbrink, W. W., Liu, D., and Van Zeeland, M. A. Tue . "Simulation of neutron emission in neutral beam injection heated plasmas with the real-time code RABBIT". United States. doi:10.1088/1741-4326/ab1edd.
@article{osti_1565956,
title = {Simulation of neutron emission in neutral beam injection heated plasmas with the real-time code RABBIT},
author = {Weiland, M. and Bilato, R. and Collins, C. S. and Heidbrink, W. W. and Liu, D. and Van Zeeland, M. A.},
abstractNote = {In plasmas heated with deuterium beams a deficit of the expected fusion neutron rate is an indicator of the deterioration of the fast-ion confinement, caused, for instance, by magnetohydrodynamic instabilities. The capability of predicting this deficit during the discharge relies on the availability of real-time estimates of the neutron rate from NBI codes which must be fast and accurate at the same time. Therefore, the recently developed real-time RABBIT code for NBI simulations has been extended to output the distribution function and calculate the neutron emission. After the description of this newly installed diagnostics in RABBIT, benchmarks with NUBEAM, a massively used and validated Monte Carlo NBI solver, are discussed on ASDEX-Upgrade and JET cases. A first application for control-room intershot analysis on DIII-D is presented, and the results are compared on a large database with a slower NUBEAM analysis. Further application possibilities, e.g. for real-time control of Alfvén eigenmodes, are outlined.},
doi = {10.1088/1741-4326/ab1edd},
journal = {Nuclear Fusion},
number = 8,
volume = 59,
place = {United States},
year = {2019},
month = {6}
}

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