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TIME-RESOLVED SPECTROSCOPIC STUDY OF A PULSED ELECTRON BEAM ABLATION PLASMA

M. Nistor1,* , F. Gherendi1, M. Magureanu1, N. B. Mandache1

Affiliation

  1. National Institute for Lasers, Plasma and Radiation Physics (L 22), 111 Atomistilor, P.O.Box MG-36, Bucharest-Magurele, Romania

Abstract

The plasma plume produced at the interaction of a pulsed, intense electron beam with a hydroxyapatite target was investigated by time-resolved optical emission spectroscopy and fast imaging. It has been found that at earlier times (<1 s) the plume expansion take place in the ionized Ar gas, while at later times (>1 s) the expansion of the HA plasma plume is dominated by the calcium atoms and ions. For determining the plasma parameters a Monte Carlo simulation-fit code was used. The excitation temperatures of the argon ions and calcium atoms become comparable in the interval 600 ns – 1000 ns after the beginning of the electron beam current. The electron density is of the order of 1017 cm-3, the electron temperature is about 1.4 eV and both decrease after about 1300 ns..

Keywords

Pulsed electron beam ablation, Hydroxyapatite.

Submitted at: Jan. 14, 2005
Accepted at: March 23, 2005

Citation

M. Nistor, F. Gherendi, M. Magureanu, N. B. Mandache, TIME-RESOLVED SPECTROSCOPIC STUDY OF A PULSED ELECTRON BEAM ABLATION PLASMA, Journal of Optoelectronics and Advanced Materials Vol. 7, Iss. 2, pp. 979-984 (2005)