Ion holes in the hydrodynamic regime in ultracold neutral plasmas

被引：10

作者：

McQuillen, P. ^{[1
]}

Castro, J. ^{[1
]}

Strickler, T. ^{[1
]}

Bradshaw, S. J. ^{[1
]}

Killian, T. C. ^{[1
]}

机构：

[1] Rice Univ, Dept Phys & Astron, Houston, TX 77005 USA

来源：

PHYSICS OF PLASMAS | 2013年 / 20卷 / 04期

基金：

美国国家科学基金会;

关键词：

RYDBERG ATOMS; NUMERICAL-SIMULATION; ACOUSTIC SHOCKS; EXPANSION; SOLITONS;

D O I：

10.1063/1.4802813

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

We describe the creation of localized density perturbations, or ion holes, in an ultracold neutral plasma in the hydrodynamic regime, and show that the holes propagate at the local ion acoustic wave speed. We also observe the process of hole splitting, which results from the formation of a density depletion initially at rest in the plasma. One-dimensional, two-fluid hydrodynamic simulations describe the results well. Measurements of the ion velocity distribution also show the effects of the ion hole and confirm the hydrodynamic conditions in the plasma. (C) 2013 AIP Publishing LLC. [http://dx.doi.org/10.1063/1.4802813]

引用

页数：7

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