Estimation of 14 MeV neutron rate from triton burn-up in future W7-X deuterium plasma campaigns
Abstract
Fast ion confinement is of major importance for the ignition of a burning fusion plasma. In future deuterium plasma campaigns of the Wendelstein 7-X stellarator, W7-X, the amount of triton burn-up is one possible measure for fast ion confinement. A well-established technique to observe triton burn-up is the 14 MeV neutron rate. In this paper, it is estimated whether an existing scintillating fibre neutron detector is also suited to measure triton burn-up in W7-X with sufficient accuracy. In this work, an estimation is presented, which can be applied to any tokamak or stellarator design and is one-dimensional in the minor radius. The inputs are profiles of density, temperature, and differential volume element as well as the triton slowing-down time. The estimation calculates the thermal deuteron fusion rate and the associated deuteron-triton fusion rate; thus, the triton burn-up generated 14 MeV neutron rate. It neither takes triton diffusion nor explicit losses into account. This thermally generated fusion rate is compared to the neutral beam injection heating induced beam-plasma fusion rate.
- Authors:
-
- Max Planck Inst. for Plasma Physics, Greifswald (Germany)
- National Inst. of Natural Sciences, Toki (Japan). National Inst. for Fusion Science; Graduate Univ. for Advanced Studies (SOKENDAI), Toki (Japan)
- Aalto Univ., Espoo (Finland)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Publication Date:
- Research Org.:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC). Fusion Energy Sciences (FES); EUROfusion Consortium
- Contributing Org.:
- W7-X Team
- OSTI Identifier:
- 1650629
- Report Number(s):
- LA-UR-19-31604
Journal ID: ISSN 0863-1042; TRN: US2202629
- Grant/Contract Number:
- 89233218CNA000001; 633053
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Contributions to Plasma Physics
- Additional Journal Information:
- Journal Volume: 60; Journal Issue: 8; Journal ID: ISSN 0863-1042
- Publisher:
- Wiley
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; Magnetic fusion energy; Triton burn-up, 14 MeV neutrons, Scintillating fiber, Wendelstein 7-X; Deuterium plasmas; Fast ion physics; Neutron diagnostics
Citation Formats
Koschinsky, J. P., Äkäslompolo, S., Biedermann, C., Bozhenkov, S. A., Isobe, M., Kontula, J., Ogawa, K., Schneider, W., Warmer, F., Wurden, G. A., and Wolf, R. C. Estimation of 14 MeV neutron rate from triton burn-up in future W7-X deuterium plasma campaigns. United States: N. p., 2020.
Web. doi:10.1002/ctpp.201900186.
Koschinsky, J. P., Äkäslompolo, S., Biedermann, C., Bozhenkov, S. A., Isobe, M., Kontula, J., Ogawa, K., Schneider, W., Warmer, F., Wurden, G. A., & Wolf, R. C. Estimation of 14 MeV neutron rate from triton burn-up in future W7-X deuterium plasma campaigns. United States. https://doi.org/10.1002/ctpp.201900186
Koschinsky, J. P., Äkäslompolo, S., Biedermann, C., Bozhenkov, S. A., Isobe, M., Kontula, J., Ogawa, K., Schneider, W., Warmer, F., Wurden, G. A., and Wolf, R. C. Tue .
"Estimation of 14 MeV neutron rate from triton burn-up in future W7-X deuterium plasma campaigns". United States. https://doi.org/10.1002/ctpp.201900186. https://www.osti.gov/servlets/purl/1650629.
@article{osti_1650629,
title = {Estimation of 14 MeV neutron rate from triton burn-up in future W7-X deuterium plasma campaigns},
author = {Koschinsky, J. P. and Äkäslompolo, S. and Biedermann, C. and Bozhenkov, S. A. and Isobe, M. and Kontula, J. and Ogawa, K. and Schneider, W. and Warmer, F. and Wurden, G. A. and Wolf, R. C.},
abstractNote = {Fast ion confinement is of major importance for the ignition of a burning fusion plasma. In future deuterium plasma campaigns of the Wendelstein 7-X stellarator, W7-X, the amount of triton burn-up is one possible measure for fast ion confinement. A well-established technique to observe triton burn-up is the 14 MeV neutron rate. In this paper, it is estimated whether an existing scintillating fibre neutron detector is also suited to measure triton burn-up in W7-X with sufficient accuracy. In this work, an estimation is presented, which can be applied to any tokamak or stellarator design and is one-dimensional in the minor radius. The inputs are profiles of density, temperature, and differential volume element as well as the triton slowing-down time. The estimation calculates the thermal deuteron fusion rate and the associated deuteron-triton fusion rate; thus, the triton burn-up generated 14 MeV neutron rate. It neither takes triton diffusion nor explicit losses into account. This thermally generated fusion rate is compared to the neutral beam injection heating induced beam-plasma fusion rate.},
doi = {10.1002/ctpp.201900186},
journal = {Contributions to Plasma Physics},
number = 8,
volume = 60,
place = {United States},
year = {Tue Feb 11 00:00:00 EST 2020},
month = {Tue Feb 11 00:00:00 EST 2020}
}
Web of Science
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