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}
}
Free Publicly Available Full Text
Publisher's Version of Record
Other availability
Search WorldCat to find libraries that may hold this journal
Cited by: 2 works
Citation information provided by
Web of Science
Web of Science
Save to My Library
You must Sign In or Create an Account in order to save documents to your library.
Works referenced in this record:
Energy confinement of hydrogen and deuterium electron-root plasmas in the Large Helical Device
journal, August 2018
- Warmer, Felix; Takahashi, H.; Tanaka, K.
- Nuclear Fusion, Vol. 58, Issue 10
Scintillating fiber detectors for time evolution measurement of the triton burnup on the Large Helical Device
journal, October 2018
- Pu, Neng; Nishitani, Takeo; Ogawa, Kunihiro
- Review of Scientific Instruments, Vol. 89, Issue 10
Scintillating‐fiber 14 MeV neutron detector on TFTR during DT operation
journal, January 1995
- Wurden, G. A.; Chrien, R. E.; Barnes, Cris W.
- Review of Scientific Instruments, Vol. 66, Issue 1
High detection efficiency scintillating fiber detector for time-resolved measurement of triton burnup 14 MeV neutron in deuterium plasma experiment
journal, October 2018
- Ogawa, Kunihiro; Isobe, Mitsutaka; Nishitani, Takeo
- Review of Scientific Instruments, Vol. 89, Issue 10
ASCOT: Solving the kinetic equation of minority particle species in tokamak plasmas
journal, April 2014
- Hirvijoki, E.; Asunta, O.; Koskela, T.
- Computer Physics Communications, Vol. 185, Issue 4
Burn-up of fusion-produced tritons and 3 He ions in PLT and PDX
journal, July 1983
- Heidbrink, W. W.; Chrien, R. E.; Strachan, J. D.
- Nuclear Fusion, Vol. 23, Issue 7
Time-resolved triton burnup measurement using the scintillating fiber detector in the Large Helical Device
journal, January 2018
- Ogawa, K.; Isobe, M.; Nishitani, T.
- Nuclear Fusion, Vol. 58, Issue 3
Performance of Wendelstein 7-X stellarator plasmas during the first divertor operation phase
journal, August 2019
- Wolf, R. C.; Alonso, A.; Äkäslompolo, S.
- Physics of Plasmas, Vol. 26, Issue 8
Three-dimensional free boundary calculations using a spectral Green's function method
journal, December 1986
- Hirshman, S. P.; van RIJ, W. I.; Merkel, P.
- Computer Physics Communications, Vol. 43, Issue 1
The behaviour of fast ions in tokamak experiments
journal, April 1994
- Heidbrink, W. W.; Sadler, G. J.
- Nuclear Fusion, Vol. 34, Issue 4
Conceptual design for a scintillating‐fiber neutron detector for fusion reactor plasma diagnostics
journal, January 1995
- Sailor, W. C.; Barnes, Cris W.; Chrien, R. E.
- Review of Scientific Instruments, Vol. 66, Issue 1
Improved formulas for fusion cross-sections and thermal reactivities
journal, April 1992
- Bosch, H. -S; Hale, G. M.
- Nuclear Fusion, Vol. 32, Issue 4
First results from divertor operation in Wendelstein 7-X
journal, November 2018
- Pedersen, Thomas Sunn; König, Ralf; Krychowiak, Maciej
- Plasma Physics and Controlled Fusion, Vol. 61, Issue 1
Current status of the neutral beam heating system of W7-X
journal, October 2013
- McNeely, Paul; Barlak, Marek; Baldzuhn, Jürgen
- Fusion Engineering and Design, Vol. 88, Issue 6-8
Fusion neutron production with deuterium neutral beam injection and enhancement of energetic-particle physics study in the large helical device
journal, June 2018
- Isobe, M.; Ogawa, K.; Nishitani, T.
- Nuclear Fusion, Vol. 58, Issue 8
Time dependent neutron emission rate analysis for neutral-beam-heated deuterium plasmas in a helical system and tokamaks
journal, August 2018
- Ogawa, Kunihiro; Isobe, Mitsutaka; Nishitani, Takeo
- Plasma Physics and Controlled Fusion, Vol. 60, Issue 9
Triton burn-up neutron emission in JET low current plasmas
journal, May 2008
- Sjöstrand, Henrik; Gorini, Giuseppe; Conroy, S.
- Journal of Physics D: Applied Physics, Vol. 41, Issue 11
Computation of classical triton burnup with high plasma temperature and current
journal, November 1991
- Batistoni, P.; Barnes, C. W.
- Plasma Physics and Controlled Fusion, Vol. 33, Issue 14
Neutron Diagnostics in the Large Helical Device
journal, June 2018
- Isobe, Mitsutaka; Ogawa, Kunihiro; Nishitani, Takeo
- IEEE Transactions on Plasma Science, Vol. 46, Issue 6
Key results from the first plasma operation phase and outlook for future performance in Wendelstein 7-X
journal, May 2017
- Sunn Pedersen, Thomas; Dinklage, Andreas; Turkin, Yuriy
- Physics of Plasmas, Vol. 24, Issue 5
Isotope Effect on Energy Confinement Time and Thermal Transport in Neutral-Beam-Heated Stellarator-Heliotron Plasmas
journal, October 2019
- Yamada, H.; Tanaka, K.; Seki, R.
- Physical Review Letters, Vol. 123, Issue 18
Triton burnup measurements and calculations on TFTR
journal, April 1998
- Barnes, C. W.; Bosch, H. -S; Hendel, H. W.
- Nuclear Fusion, Vol. 38, Issue 4
Energetic ion confinement studies using comprehensive neutron diagnostics in the Large Helical Device
journal, June 2019
- Ogawa, K.; Isobe, M.; Nishitani, T.
- Nuclear Fusion, Vol. 59, Issue 7
Triton burn-up study in JT-60U
journal, March 1996
- Nishitani, T.; Hoek, M.; Harano, H.
- Plasma Physics and Controlled Fusion, Vol. 38, Issue 3