Electron kinetics inferred from observations of microwave bursts during edge localized modes in the mega-amp spherical tokamak.
Electron kinetics inferred from observations of microwave bursts during edge localized modes in the mega-amp spherical tokamak.
复制标题
DOI：
10.1103/physrevlett.114.125004
复制
发表时间：
2014-11
影响因子：
8.6
通讯作者：
S. J. Freethy;K. McClements;S. C. Chapman;R. Dendy;W. Lai;S. J. P. Pamela-S. J. P.-Pamela-2251507688;V. Shevchenko;R. Vann
中科院分区：
文献类型：
--
作者：
S. J. Freethy;K. McClements;S. C. Chapman;R. Dendy;W. Lai;S. J. P. Pamela-S. J. P.-Pamela-2251507688;V. Shevchenko;R. Vann
最近对托卡马克等离子体边缘局域模（ELM）活动期间微波和X射线发射的测量为ELM物理提供了一个新的视角。很明显，电子动力学，这是不纳入标准（流体）模型的不稳定性，驱动ELMs，在新的观察中发挥了关键作用。这些影响应纳入未来的生态系统模型和生态系统循环模型。观察到的辐射效应矛盾地意味着平行于磁场的电子加速与垂直动量的快速获得相结合。它表明，这个悖论可以解决的异常多普勒不稳定性，使快速集体辐射弛豫的行动，在垂直方向上，在平行方向上加速的电子由初始ELM不稳定性产生的感应电场。
Recent measurements of microwave and x-ray emission during edge localized mode (ELM) activity in tokamak plasmas provide a fresh perspective on ELM physics. It is evident that electron kinetics, which are not incorporated in standard (fluid) models for the instability that drives ELMs, play a key role in the new observations. These effects should be included in future models for ELMs and the ELM cycle. The observed radiative effects paradoxically imply acceleration of electrons parallel to the magnetic field combined with rapid acquisition of perpendicular momentum. It is shown that this paradox can be resolved by the action of the anomalous Doppler instability which enables fast collective radiative relaxation, in the perpendicular direction, of electrons accelerated in the parallel direction by inductive electric fields generated by the initial ELM instability.