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Theory and simulation of discrete kinetic beta induced Alfvén eigenmode in tokamak plasmas

机译:托卡马克等离子体中离散的动力学β诱导Alfvén本征模的理论和模拟

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摘要

It is shown, both analytically and by numerical simulations, that, in the presence of thermal ion kinetic effects, the beta induced Alfvén eigenmode (BAE)- shear Alfvén wave continuous spectrum can be discretized into radially trapped eigenstates known as kinetic BAE (KBAE). While thermal ion compressibility gives rise to finite BAE accumulation point frequency, the discretization occurs via the finite Larmor radius and finite orbit width effects. Simulations and analytical theories agree both qualitatively and quantitatively. Simulations also demonstrate that KBAE can be readily excited by the finite radial gradients of energetic particles.
机译:通过分析和数值模拟表明,在存在热离子动力学效应的情况下,β诱导的Alfvén本征模(BAE)-剪切Alfvén波连续谱可以离散为径向捕获的本征态,称为动力学BAE(KBAE) 。尽管热离子可压缩性产生了有限的BAE累积点频率,但离散化是通过有限的拉莫尔半径和有限的轨道宽度效应发生的。模拟和分析理论在质量和数量上都一致。模拟还表明,高能粒子可以通过有限的径向梯度轻松激发KBAE。

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