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Proceedings Paper

Velocity distribution function of electrons plasma produced by high power laser pulse interacting aluminum target
Author(s): M. H. Mahdieh; E. M. Razi
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Paper Abstract

This paper presents the experimental results of studying the distribution function of electrons plasma produced by irradiating aluminum target by nanosecond pulsed laser in vacuum. The laser beam was provided by second harmonic of a Q-switched Nd:YAG pulsed laser with ~10 nsec pulse duration and energy of 70 mJ. A home made Faraday cup was used for detecting the current signal. From analyzing the time of flight (TOF) experimental distribution function was determined. Comparing the experimental distribution function with Maxwell-Boltzamnn and effusion distribution functions, the electron temperature was estimated. From the experimental results, the velocity of maximum electron flux was determined. In this study the influence of the probe position and biasing voltage was investigated. The results show that the velocity of maximum electron flux and associated temperature rises with distance from the target surface. The results also show that effusion distribution function is more appropriate for modeling such plasma.

Paper Details

Date Published: 15 November 2010
PDF: 7 pages
Proc. SPIE 7751, XVIII International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, 77511O (15 November 2010); doi: 10.1117/12.879597
Show Author Affiliations
M. H. Mahdieh, Iran Univ. of Science and Technology (Iran, Islamic Republic of)
E. M. Razi, Iran Univ. of Science and Technology (Iran, Islamic Republic of)


Published in SPIE Proceedings Vol. 7751:
XVIII International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers
Tanja Dreischuh; Petar A. Atanasov; Nikola V. Sabotinov, Editor(s)

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