Stimulated Emission of Fast Alfven Waves within Magnetically Confined Fusion Plasmas

被引：21
|
作者：
Cook, J. W. S. [1 ,2 ]
Dendy, R. O. [1 ,3 ]
Chapman, S. C. [1 ]
机构：
[1] Univ Warwick, Dept Phys, Ctr Fus Space & Astrophys, Coventry CV4 7AL, W Midlands, England
[2] First Light Fus Ltd, Unit 10, Oxford Ind Pk, Yarnton OX5 1QU, England
[3] Culham Sci Ctr, CCFE, Abingdon OX14 3DB, Oxon, England
来源：
PHYSICAL REVIEW LETTERS | 2017年 / 118卷 / 18期
基金：
英国工程与自然科学研究理事会;
关键词：
ION-CYCLOTRON EMISSION; ENERGETIC ALPHA-PARTICLES; TEST REACTOR; BEAM IONS; TOKAMAK; PRODUCTS; JET; INSTABILITY; EXCITATION; MECHANISM;
D O I：
10.1103/PhysRevLett.118.185001
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
A fast Alfven 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.
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页数：5
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