title: Nonlinear compressional pulses in a 2D crystallized dusty plasma.
abstract: 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.
authors.affiliation: Department of Physics and Astronomy, The University of Iowa, Iowa City, Iowa 52242, USA. vladimir-nosenko@uiowa.edu
authors.forename: V
authors.initials: V
authors.lastname: Nosenko
authors.forename: S
authors.initials: S
authors.lastname: Nunomura
authors.forename: J
authors.initials: J
authors.lastname: Goree