Estimation of 14 MeV neutron rate from triton burn-up in future W7-X deuterium plasma campaigns
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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2020-09
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en
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9
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Contributions to Plasma Physics, Volume 60, issue 8
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. 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.Description
| openaire: EC/H2020/633053/EU//EUROfusion
Keywords
deuterium plasmas, fast ion physics, neutron diagnostics, triton burn-up, W7-X
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Äkäslompolo, S, Kontula, J & W7-X Team 2020, ' Estimation of 14 MeV neutron rate from triton burn-up in future W7-X deuterium plasma campaigns ', Contributions to Plasma Physics, vol. 60, no. 8, 201900186 . https://doi.org/10.1002/ctpp.201900186