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Stimulated emission of fast Alfvén waves within magnetically confined fusion plasmas
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Cook, James William S., Dendy, R. O. and Chapman, Sandra C. (2017) Stimulated emission of fast Alfvén waves within magnetically confined fusion plasmas. Physical Review Letters, 118 . 185001. doi:10.1103/PhysRevLett.118.185001
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Official URL: http://doi.org/10.1103/PhysRevLett.118.185001
Abstract
A fast Alfvén wave with a finite amplitude is shown to grow by a stimulated emission process that we propose for exploitation in toroidal magnetically confined fusion plasmas. Stimulated emission occurs while the wave propagates inward through the outer midplane plasma, where a population inversion of the energy distribution of fusion-born ions is observed to arise naturally. Fully nonlinear first-principles simulations, which self-consistently evolve particles and fields under the Maxwell-Lorentz system, demonstrate this novel “alpha-particle channeling” scenario for the first time.
| Item Type: | Journal Article | ||||||
|---|---|---|---|---|---|---|---|
| Subjects: | Q Science > QC Physics | ||||||
| Divisions: | Faculty of Science > Physics | ||||||
| Library of Congress Subject Headings (LCSH): | Magnetohydrodynamic waves, Tokamaks, Cyclotron waves | ||||||
| Journal or Publication Title: | Physical Review Letters | ||||||
| Publisher: | American Physical Society | ||||||
| ISSN: | 0031-9007 | ||||||
| Official Date: | 4 May 2017 | ||||||
| Dates: |
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| Date of first compliant deposit: | 2 November 2017 | ||||||
| Volume: | 118 | ||||||
| Article Number: | 185001 | ||||||
| DOI: | 10.1103/PhysRevLett.118.185001 | ||||||
| Status: | Peer Reviewed | ||||||
| Publication Status: | Published | ||||||
| Access rights to Published version: | Open Access | ||||||
| Copyright Holders: | UK Atomic Energy Authority | ||||||
| Funder: | Research Councils UK (RCUK) | ||||||
| Grant number: | EP/I501045 |
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