标题： 回旋共振阻尼对行星际湍流动能耗散的贡献 显示英文标题

标题： Contribution of cyclotron-resonant damping to kinetic dissipation of interplanetary turbulence

摘要： 我们研究了从风神号(Wind)磁场数据的33个区间提取的惯性范围和耗散范围关联以及谱分析的一些含义。 当考察场极性和横螺旋性和磁螺旋性的特征时，大多数数据集表明热质子涉及的回旋共振耗散过程发挥了某种作用。 我们推测，在耗散范围内活跃的谱级联由回旋共振和非回旋共振动能耗散机制的组合所平衡，其中只有前者诱导磁螺旋性特征。 受数据约束的速率平衡理论表明，两种机制的比例约为一。 虽然高度简化，但这种方法似乎可以解释若干观测到的特征，并解释为何通常未观察到完全的回旋吸收及其对应的纯磁螺旋性特征。 显示英文摘要

摘要： We examine some implications of inertial range and dissipation range correlation and spectral analyses extracted from 33 intervals of Wind magnetic field data. When field polarity and signatures of cross helicity and magnetic helicity are examined, most of the datasets suggest some role of cyclotron resonant dissipative processes involving thermal protons. We postulate that an active spectral cascade into the dissipation range is balanced by a combination of cyclotron-resonant and non-cyclotron-resonant kinetic dissipation mechanisms, of which only the former induces a magnetic helicity signature. A rate balance theory, constrained by the data, suggests that the ratio of the two mechanisms is of order unity. While highly simplified, this approach appears to account for several observed features, and explains why complete cyclotron absorption, and the corresponding pure magnetic helicity signature, is usually not observed.