title: Spatial relaxation of selective laser perturbations in a glow discharge plasma.
abstract: An effect of a nonlocal plasma response caused by local laser radiation exciting atoms in resonant and metastable states is observed in a dc neon glow discharge. Starting at the perturbed position, spatially damped oscillations in the direction of the anode effecting all plasma quantities are created. Depending on the excitation of resonant or metastable atoms, the oscillations are phase-shifted by π. If the laser excites in particular a cycling transition, no nonlocal plasma response is observed. The relaxation of the plasma is investigated by means of visible light measurements using a line camera in the vicinity of the axial perturbation position. The effect is modeled in terms of nonlocal electron kinetics by solving the spatially inhomogeneous electron Boltzmann equation.
authors: Center for Energy Research, University of California-San Diego, La Jolla, California 92093-0417, USA. chbrandt@ucsd.edu
authors: C
authors: C
authors: Brandt
authors: R
authors: R
authors: Kozakov
authors: H
authors: H
authors: Testrich
authors: Yu B
authors: YB
authors: Golubovskii
authors: C
authors: C
authors: Wilke
mesh_terms: D000465:Algorithms; D003198:Computer Simulation; D007834:Lasers; D008956:Models, Chemical; D058626:Plasma Gases / Q000737:chemistry* / Q000528:radiation effects*
chemical_list: D058626:Plasma Gases