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Particle-in-cell simulations of the magnetoacoustic cyclotron instability of fusion-born alpha-particles in tokamak plasmas

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Cook, James William S., Dendy, R. O. and Chapman, Sandra C. (2013) Particle-in-cell simulations of the magnetoacoustic cyclotron instability of fusion-born alpha-particles in tokamak plasmas. Plasma Physics and Controlled Fusion, 55 (6). 065003. doi:10.1088/0741-3335/55/6/065003 ISSN 0741-3335.

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Official URL: http://dx.doi.org/10.1088/0741-3335/55/6/065003

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Abstract

Ion cyclotron emission (ICE) is the only collective radiative instability, driven by confined fusion-born alpha-particles, observed from deuterium–tritium (DT) plasmas in both JET and TFTR. Using first principles particle-in-cell simulations of the magnetoacoustic cyclotron instability (MCI), we elucidate some of the fully kinetic nonlinear processes that may underlie observations of ICE from fusion products in these large tokamaks. We find that the MCI is intrinsically self-limiting on very fast timescales, which may help explain the observed correlation between linear theory and observed ICE intensity. The simulations elaborate the nature of the excited electric and magnetic fluctuations, from first principles, confirming the dominant role of fast Alfvénic and electrostatic components which is assumed ab initio in analytical treatments.

Item Type: Journal Article
Divisions: Faculty of Science, Engineering and Medicine > Science > Physics
Journal or Publication Title: Plasma Physics and Controlled Fusion
Publisher: Institute of Physics Publishing Ltd.
ISSN: 0741-3335
Official Date: 29 April 2013
Dates:
DateEvent
29 April 2013Published
Volume: 55
Number: 6
Article Number: 065003
DOI: 10.1088/0741-3335/55/6/065003
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access

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