垂直尘埃粒子链-质量和电荷测量
Vertical Dust Particle Chains-Mass and Charge Measurements
摘要：
自从1994年在实验产生的复杂等离子体中发现有序结构（晶体）形成以来，尘埃等离子体已经产生了大量的兴趣。在这些复杂的等离子体中产生的等离子体鞘内的尘埃颗粒可以形成垂直链，由于流离子尾场。对于这些配置中最简单的（两个粒子链），最靠近下电极的粒子通常将保持在离下电极最远的粒子的阴影中。这导致两个粒子感受到不同的离子拖曳力：顶部粒子受到从等离子体指向下部电极的离子拖曳力的作用，而底部粒子受到由上部粒子与离子拖曳力的相互作用产生的所得尾场的作用。这种动态的情况下，目前提供了最知名的实验环境，检查背后的离子阻力和它与等离子体鞘的相互作用的物理。提出了一种基于直流偏压调制技术对下电极偏压进行调制的方法，用于研究双粒子链之间的相互作用。
英文摘要：
Dusty plasmas have generated a large amount of interest since the discovery of ordered structure (crystal) formation in experimentally generated complex plasmas in 1994. Dust particles within the plasma sheath generated in these complex plasmas can form vertical chains due to the streaming ion wakefield. For the simplest of these configurations (a two particle chain), the particle closest to the lower electrode will generally remain in the shadow of the particle farthest from the lower electrode. These results in the two particles feeling differing ion drag forces: the top particle is acted on by the ion drag force directed from the plasma to the lower electrode, while the bottom particle is acted upon by the resulting wakefield produced by the interaction of the upper particle with the ion drag force. This dynamic situation currently provides the best known experimental environment for examining the physics behind the ion drag force and its interaction with the plasma sheath. An experimental method for investigating the interaction between pair-particle chains based on modulating the bias on the lower electrode employing a DC bias modulation technique will be presented.
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