skip to main content

SciTech ConnectSciTech Connect

Title: Effects of nonthermal electrons on plasma expansion into vacuum

The expansion of semi-infinite plasma into vacuum is analyzed with a hydrodynamic model for cold ions assuming electrons modelled by a kappa-type distribution. Similarly to Mora study of a plasma expansion into vacuum [P. Mora, Phys. Rev. Lett. 90, 185002 (2003)], we formulated empirical expressions for the electric field strength, velocity, and position of the ion front in one-dimensional nonrelativistic, collisionless isothermally expanding plasma. Analytic expressions for the maximum ion energy and the spectrum of the accelerated ions in the plasma were derived and discussed to highlight the electron nonthermal effects on enhancing the ion acceleration in plasma expansion into vacuum.
Authors:
;  [1] ; ;  [2]
  1. Centre de Développement des Technologies Avancées, B.P. 17 Baba Hassen, 16303 Algiers (Algeria)
  2. Theoretical Physics Laboratory, Faculty of Physics, USTHB, B.P. 32 Bab Ezzouar, 16079 Algiers (Algeria)
Publication Date:
OSTI Identifier:
22412986
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 4; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ACCELERATION; ELECTRIC FIELDS; ELECTRONS; HYDRODYNAMICS; IONS; ONE-DIMENSIONAL CALCULATIONS; PLASMA; PLASMA EXPANSION; VELOCITY