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Proceedings Paper

Plasma focus source of x-ray emission
Author(s): Valery Ya. Nikulin; Vera M. Romanova; Marek Scholz
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Paper Abstract

In a series of pyrazole containing molecules doped into polystyrene, electron drift mobility was measured by time-of-flight techniques. Values of mobility increase from 5x10-7 to 3x10-5 cm2/(V s) as an electric field increases from 6 to 70 V/mm and room temperature. In order to elucidate the relationship between chemical structure and mobility, the electron transport was represented in terms of the redox process: a transfer of electron from the single occupied molecular orbital (MO) of the radical anions to the lowest unoccupied MO of the neutral molecules. Energy and wave-function decay constant of MOs were computed with the semiempirical quantum-chemical methods and the PM3 was found to be a more credible method when compared with the AM1. The experimental data on mobility are fit well into a correlated disorder model for a dipole medium when quantum parameters of the transport molecules are taken into account.

Paper Details

Date Published: 19 March 2002
PDF: 8 pages
Proc. SPIE 4460, Selected Research Papers on Spectroscopy of Nonequilibrium Plasma at Elevated Pressures, (19 March 2002); doi: 10.1117/12.459415
Show Author Affiliations
Valery Ya. Nikulin, P.N. Lebedev Physical Institute (Russia)
Vera M. Romanova, P.N. Lebedev Physical Institute (Russia)
Marek Scholz, Institute of Plasma Physics and Laser Microfusion (Poland)

Published in SPIE Proceedings Vol. 4460:
Selected Research Papers on Spectroscopy of Nonequilibrium Plasma at Elevated Pressures

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