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Electron kinetics and selective ionization of recoil atoms in an ion guide ion source plasma

Published online by Cambridge University Press:  01 April 2003

G. M. PETROV
Affiliation:
Berkeley Scholars Inc., PO Box 852, Springfield, VA 22150, USA
S. ATANASSOVA
Affiliation:
Institute of Solid State Physics, Bulgarian Academy of Sciences, 72 Tzarigradsko Chaussee Blvd, BG-1784 Sofia, Bulgaria ([email protected])
D. ZHECHEV
Affiliation:
Institute of Solid State Physics, Bulgarian Academy of Sciences, 72 Tzarigradsko Chaussee Blvd, BG-1784 Sofia, Bulgaria ([email protected])
G. V. MISHINSKY
Affiliation:
Joint Institute for Nuclear Research, Flerov Laboratory of Nuclear Reactions, 141980 Dubna, Moscow Region, Russia ([email protected])
V. I. ZHEMENIK
Affiliation:
Joint Institute for Nuclear Research, Flerov Laboratory of Nuclear Reactions, 141980 Dubna, Moscow Region, Russia ([email protected])

Abstract

An electrodeless plasma produced in an ion guide ion source by a high-energy heavy ion beam propagating through a noble gas has been studied. The plasma parameters in Ar and He buffer gases have been calculated and analysed for projectile beam intensities from 10$^{9}$ to 10$^{17}$ pps cm$^{-2}$. The plasma is characterized by very low electron and gas temperatures, but with an appreciable number of electrons with energy sufficient to ionize atoms of most chemical elements. The ion guide ion source plasma, combined with laser-enhanced ionization of the studied element, is used to improve the detection limit by enhancing the signal-to-noise ratio.

Type
Research Article
Copyright
2002 Cambridge University Press

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