论文标题
单波的无阈值无随机粒子加热
Thresholdless stochastic particle heating by a single wave
论文作者
论文摘要
随机加热是一种众所周知的机制，通过低频电磁波可以通过该机制能够通过该机制来通电。在其最简单的版本中，在空间均匀的条件下，它仅在标准化波振幅中的阈值以上可操作，这在实际情况下可能是苛刻的必要条件，严重限制了其适用性范围。在这项工作中，我们通过检查粒子哈密顿量支持的数值模拟表明，即使是非常弱的空间不均匀性，也完全消除了阈值，从而在波幅度上对波幅度的需求进行了交换，并需要在波和粒子之间的相互作用持续时间内进行必要的时间。这里考虑的无阈值混乱机制可能适用于其他不均匀系统。
Stochastic heating is a well-known mechanism through which magnetized particles may be energized by low-frequency electromagnetic waves. In its simplest version, under spatially homogeneous conditions, it is known to be operative only above a threshold in the normalized wave amplitude, which may be a demanding requisite in actual scenarios, severely restricting its range of applicability. In this work we show, by numerical simulations supported by inspection of the particle Hamiltonian, that allowing for even a very weak spatial inhomogeneity completely removes the threshold, trading the requirement upon the wave amplitude with a requisite upon the duration of the interaction between wave and particle. The thresholdless chaotic mechanism considered here is likely to be applicable to other inhomogeneous systems.
