Nonlinear compressional pulses in a 2D crystallized dusty plasma.
Compressional pulses were launched in a two-dimensional Yukawa lattice, a hexagonal monolayer of polymer microspheres suspended in a plasma. The pulsed wave was excited by a laser beam, and nonlinear effects were observed for Mach numbers M>0.07 and for variation of particle number density delta(n)/n>0.1, but no steepening of the pulse was detected. The pulse propagation speed was found to be comparable to the sound speed of compressional waves launched with sinusoidal excitation.
Nosenko
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Department of Physics and Astronomy, The University of Iowa, Iowa City, Iowa 52242, USA. vladimir-nosenko@uiowa.edu
Nunomura
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Goree
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