期刊
PHYSICAL REVIEW E
卷 101, 期 4, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevE.101.043211
关键词
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资金
- U.S. Department of Energy [DE-SG0014566]
- Army Research Office under MURI [W911NF-18-1-0240]
- NASA-JPL subcontract [1573629]
A shock that is continuously driven by a moving exciter will propagate at a speed that depends on the exciter speed. We obtained this dependence experimentally, in a strongly coupled dusty plasma that was prepared as a single two-dimensional layer of charged microparticles. Attaining this result required an experimental advance, developing a method of driving a shock continuously, which we did using an exciter moving at a constant supersonic speed, analogous to a piston in a cylinder. The resulting compressional pulse was a shock that propagated steadily without weakening, ahead of the moving exciter. We compare our experimental results to an empirical form M-shock = 1 + sM(exciter), and to the prediction of a recent simulation.
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