Abstract
The modeling of laser-generated plasmas can be carried out by means of different theoretical approaches. Hydrodynamic simulations have the advantage of treating the plasma as a continuous fluid that expands in vacuum with a high Mach number. We used the analytical Anisimov model for the numerical simulations of a plasma expanding at supersonic velocities. The model describes the plume by means of a special solution of the gas dynamical equations on the hypothesis that the flow expands adiabatically. Here, we carry out a comparative analysis between experimental and numerical results: the model fits the experimental data for monoatomic plumes quite well. More specifically, the numerical data have been tested by comparing the time-of-flight signals obtained at the INFN-LNS in Catania from a pure metallic target. A Coulomb drift velocity was added to the expansion velocity, and only in this way was it possible to explain the experimental results, thus confirming the presence of self-generated electrostatic fields inside the expanding plasma plume.
Original language | English |
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Pages (from-to) | 543-550 |
Number of pages | 8 |
Journal | Radiation Effects and Defects in Solids |
Volume | 165 |
Issue number | 6-10 |
DOIs | |
Publication status | Published - Jun 2010 |
Externally published | Yes |
Bibliographical note
Copyright:Copyright 2010 Elsevier B.V., All rights reserved.
Keywords
- Adiabatic expansion
- Gas dynamical equations
- Time of flight
ASJC Scopus subject areas
- Radiation
- Nuclear and High Energy Physics
- Materials Science(all)
- Condensed Matter Physics