Title: Quadrilateral particle arrangement within shocks in a two-dimensional dusty plasma

Journal Article · · Physical Review. E

The microscopic structure within a two-dimensional shock was studied using data from a dusty plasma experiment. A single layer of charged microparticles, levitated in a glow-discharge plasma, was perturbed by an electrically floating wire that was moved at a steady supersonic speed to excite a compressional shock. A rearrangement of particles was observed, from a hexagonal lattice in the preshock into a quadrilateral microstructure on the front side of the shock. This quadrilateral structure would not be stable in a monolayer of identical repulsive particles, under equilibrium conditions. Glaser-Clark polygon analysis of the microstructure helped in identifying quadrilaterals. Voronoi analysis was used to characterize the defect fraction behind the shock, as an indication of shock-induced melting. Published by the American Physical Society 2025

Sponsoring Organization:
USDOE
Grant/Contract Number:
SC0014566; SC0025444
OSTI ID:
2549493
Journal Information:
Physical Review. E, Journal Name: Physical Review. E Journal Issue: 4 Vol. 111; ISSN PLEEE8; ISSN 2470-0045
Publisher:
American Physical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

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