Self-similar plasma expansion of a limited mass into vacuum

2006 ◽  
Vol 133 ◽  
pp. 329-334
Author(s):  
M. Murakami ◽  
M. M. Basko
Keyword(s):  
Plasma Expansion ◽  
Limited Mass ◽  
Self Similar

Effects of Magnetic Field of Self-Similar Plasma Expansion into Vacuum

1980 ◽  
Vol 22 (5) ◽  
pp. 507-509 ◽  
Author(s):  
D Anderson ◽  
M Bonnedal ◽  
M Lisak
Keyword(s):  
Magnetic Field ◽  
Plasma Expansion ◽  
Self Similar

On the Electron Distribution Effect of an Expanding Laser Ablated Plasma

2011 ◽  
Vol 227 ◽  
pp. 53-56 ◽  
Author(s):  
Djamila Bennaceur-Doumaz ◽  
Djemai Bara ◽  
Mourad Djebli
Keyword(s):  
Distribution Function ◽  
Laser Ablation ◽  
Electrostatic Potential ◽  
Electron Distribution ◽  
The Self ◽  
Plasma Expansion ◽  
Trapped Electrons ◽  
Distribution Effect ◽  
Self Similar ◽  
Salient Features

Based on the Gurevich distribution function, the effect of trapped electrons by the electrostatic potential rising during plasma expansion is investigated. The self similar approach is used to find the expanding profiles of density and velocity. The present work may be used to understand the salient features of the expansion of plasma produced by laser ablation.

scholarly journals Self-similar solution of laser-produced plasma expansion into vacuum with kappa-distributed electrons

Nukleonika ◽  
2016 ◽  
Vol 61 (2) ◽  
pp. 115-118
Author(s):  
Djamila Bennaceur-Doumaz ◽  
Djemai Bara
Keyword(s):  
Hydrodynamic Model ◽  
The Self ◽  
Plasma Expansion ◽  
Type Distribution ◽  
Self Similar Solution ◽  
Laser Produced Plasma ◽  
Analytic Expressions ◽  
Self Similar ◽  
Kappa Distributed Electrons

Abstract The expansion of semi-infinite laser produced plasma into vacuum is analyzed with a hydrodynamic model for cold ions assuming electrons modeled by a kappa-type distribution. Self-similar analytic expressions for the potential, velocity, and density of the plasma have been derived. It is shown that nonthermal energetic electrons have the role of accelerating the self-similar expansion.

Models of laser-plasma ablation

1986 ◽  
Vol 35 (1) ◽  
pp. 43-74 ◽  
Author(s):  
G. J. Pert
Keyword(s):  
Numerical Simulation ◽  
Laser Plasma ◽  
External Heat ◽  
Functional Relationships ◽  
External Heat Source ◽  
Plasma Ablation ◽  
Dense Fluid ◽  
Limited Mass ◽  
Self Similar ◽  
Small Targets

Dimensional analysis is used to predict the functional relationships amongst the characteristic variables of the ablation of a cold dense fluid by an imposed external heat source. From these relations, self-similar limiting forms are identified and evaluated. Numerical simulation is used to investigate the interpolation between these limits. Self-similar forms generalizing well-known existing solutions of relevance to laser-plasma are demonstrated and include a general proof of Nemchinov's hypothesis for the heating of small targets of limited mass.

scholarly journals Self-similar analytical model of plasma expansion in a magnetic field

2011 ◽  
Vol 84 (6) ◽  
pp. 065003 ◽  
Author(s):  
H B Nersisyan ◽  
K A Sargsyan ◽  
D A Osipyan ◽  
M V Sargsyan ◽  
H H Matevosyan
Keyword(s):  
Magnetic Field ◽  
Analytical Model ◽  
Plasma Expansion ◽  
Self Similar

A study of plasma expansion phenomena in laboratory generated plasma wakes: preliminary results

1985 ◽  
Vol 33 (1) ◽  
pp. 71-82 ◽  
Author(s):  
K. H. Wright ◽  
N. H. Stone ◽  
U. Samir
Keyword(s):  
Early Time ◽  
Detailed Comparison ◽  
Plasma Expansion ◽  
Near Wake ◽  
Space Potential ◽  
Self Similar ◽  
The Creation ◽  
Similar Theory ◽  
Chamber Size ◽  
Good Agreement

The plasma expansion into the wake of a large rectangular plate immersed in a single-ion, collisionless, streaming plasma has been investigated in the laboratory. Several characteristics of the process involved in ‘plasma expansion into vacuum’ that have been predicted theoretically were observed, including the creation and motion of a rarefaction wave disturbance; the creation and motion of an expansion front; and the acceleration of ions into the wake at speeds above the ion-acoustic speed. The expansion was limited to early times; i.e. a few ion plasma periods, by the combination of plasma drift speed and vacuum chamber size. This prevented detailed comparison with self-similar theory, but results are in good agreement with numerical simulations and other laboratory experiments for the early time expansion. The conclusion is that the plasma expansion process is the dominant wake filling mechanism in the near wake of a body, whose potential is approximately the plasma space potential.

Free expansion of a plasma with two electron temperatures

1979 ◽  
Vol 22 (1) ◽  
pp. 167-185 ◽  
Author(s):  
L. M. Wickens ◽  
J. E. Allen
Keyword(s):  
Electron Temperature ◽  
Slow Component ◽  
Similar Solution ◽  
Cold Electron ◽  
Plasma Expansion ◽  
Temperature Ratio ◽  
Free Expansion ◽  
Fast Ions ◽  
Self Similar Solution ◽  
Self Similar

A theory for the free expansion of a plasma with two electron temperatures is presented. It is shown that in the case of a laser-produced plasma expansion the ions separate into a fast and a slow component, and that the number of fast ions is particularly sensitive to the hot to cold electron temperature ratio. If the electron temperature ratio is ≳ 10 then the quasi-neutral self-similar solution breaks down. The regions in the rarefaction expansion where the quasi-neutrality assumption fails are discussed.

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