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arXiv 1010.4286physics.plasm-ph
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尘埃等离子体中晶格鞘层电场的热泳探测

Probing the sheath electric field with a crystal lattice by using thermophoresis in dusty plasma

Victor Land, Bernard Smith, Lorin Matthews, Truell Hyde

摘要:

通过加热或冷却下电极来操纵悬浮在改进的气体电子会议(GEC)参比池鞘中的二维尘埃晶体。尘埃电荷是通过测量悬浮晶体的全局特性而获得的,这些全局特性是从俯视图获得的。从力平衡的角度出发,对鞘层中的电场进行了重构。从玻姆判据出发,我们得出尘埃晶体主要悬浮在经典玻姆点的上方和下方。

英文摘要:

A two-dimensional dust crystal levitated in the sheath of a modified Gaseous Electronics Conference (GEC) reference cell is manipulated by heating or cooling the lower electrode. The dust charge is obtained by measuring global characteristics of the levitated crystal obtained from top-view pictures. From the force balance, the electric field in the sheath is reconstructed. From the Bohm criterion, we conclude that the dust crystal is levitated mainly above and just below the classical Bohm point.

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