论文标题
在缓慢旋转的磁场中通过轨道不稳定性通过轨道不稳定性燃烧电荷的颗粒
Energizing charged particles by an orbit instability in a slowly rotating magnetic field
论文作者
论文摘要
分析研究了带电粒子运动在均匀磁场中的稳定性，分析研究了空间均匀的横向旋转磁场（RMF）。发现单粒子轨道的稳定性图主要取决于所选边界条件。我们表明，对于许多边界条件和参数空间中的较大区域，RMFS的振荡远低于回旋频率，可能会导致运动中的线性不稳定性，从而破坏$μ$ $ $ iN的稳定性和能量颗粒。这样的能量可能与$μ$的绝热不变性不一致；但是，绝热不变性是一个渐近结果，并不排除在缓慢频率下振荡的磁场加热。这种机制可能有助于在Rotamak-FRC实验中的场反向构型（FRC）的边缘等离子体中加热。此外，这些由RMF驱动的不稳定性在此类设备中形成FRC期间可能会显着增强方位角电流驱动。
The stability of charged particle motion in a uniform magnetic field with an added spatially uniform transverse rotating magnetic field (RMF) is studied analytically. It is found that the stability diagram of a single-particle's orbit depends critically on the chosen boundary conditions. We show that for many boundary conditions and wide regions in the parameter space, RMFs oscillating far below the cyclotron frequency can cause linear instabilities in the motion which break $μ$-invariance and energize particles. Such energization may appear at odds with the adiabatic invariance of $μ$; however, adiabatic invariance is an asymptotic result, and does not preclude such heating by magnetic fields oscillating at slow frequencies. This mechanism may contribute to heating in the edge plasma of field-reversed configurations (FRCs) in rotamak-FRC experiments. Furthermore, these RMF-driven instabilities may significantly enhance azimuthal current drive during the formation of FRCs in such devices.
