Stimulated emission of fast Alfvén waves within magnetically confined fusion plasmas
arXiv:1606.00386 · doi:10.1103/PhysRevLett.118.185001
Abstract
A fast Alfvén wave with 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 mid-plane 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 channelling" scenario for the first time.
5 pages, 4 figures
References in corpus (5)
- Alpha Channeling in a Rotating Plasma
- Fast particle-driven ion cyclotron emission (ICE) in tokamak plasmas and the case for an ICE diagnostic in ITER
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Cited by in corpus (6)
- Observations and modelling of ion cyclotron emission observed in JET plasmas using a sub-harmonic arc detection system during ion cyclotron resonance heating
- Momentum Conservation in Current Drive and Alpha-Channeling-Mediated Rotation Drive
- Wave-Driven Torques to Drive Current and Rotation
- Ponderomotive Recoil for Electromagnetic Waves
- On the merit of hot ion mode for tearing mode stabilization
- Kinetic Theory of Transport Driven Current in Centrally fuelled Plasmas