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Title: Shocks propagate in a 2D dusty plasma with less attenuation than due to gas friction alone

Journal Article · · Physics of Plasmas
DOI:https://doi.org/10.1063/5.0016504· OSTI ID:1863406

In a dusty plasma, an impulsively generated shock, i.e., blast wave, was observed to decay less than would be expected due to gas friction alone. In the experiment, a single layer of microparticles was levitated in a radio frequency glow-discharge plasma. In this layer, the microparticles were self-organized as a 2D solid-like strongly coupled plasma, which was perturbed by the piston-like mechanical movement of a wire. To excite a blast wave, the wire’s motion was abruptly stopped, so that the input of mechanical energy ceased at a known time. It was seen that, as it propagated across the layer, the blast wave’s amplitude persisted with little decay. This result extends similar findings, in previous experiments with 3D microparticle clouds, to the case of 2D clouds. In our cloud, out-of-plane displacements were observed, lending support to the possibility that an instability, driven by wakes in the ion flow, provides energy that sustains the blast wave’s amplitude despite the presence of gas damping

Research Organization:
Univ. of Iowa, Iowa City, IA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
SC0014566; SG0014566
OSTI ID:
1863406
Alternate ID(s):
OSTI ID: 1712541
Journal Information:
Physics of Plasmas, Vol. 27, Issue 11; ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

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