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Energies and charge-state fractions of carbon plasma ions measured with Doppler-shifts in the pulsed arc-discharge system

Published online by Cambridge University Press:  10 April 2003

V.-M. Tiainen ,
E. Alakoski ,
M. Kiuru ,
A. Soininen  and
A. Anttila
V.-M. Tiainen*
Affiliation:
Department of Physical Sciences, University of Helsinki, PO Box 64, 00014 University of Helsinki, Finland
E. Alakoski
Affiliation:
Department of Physical Sciences, University of Helsinki, PO Box 64, 00014 University of Helsinki, Finland
M. Kiuru
Affiliation:
Department of Physical Sciences, University of Helsinki, PO Box 64, 00014 University of Helsinki, Finland
A. Soininen
Affiliation:
Department of Physical Sciences, University of Helsinki, PO Box 64, 00014 University of Helsinki, Finland
A. Anttila
Affiliation:
Department of Physical Sciences, University of Helsinki, PO Box 64, 00014 University of Helsinki, Finland
*
veli-matti.tiainen@helsinki.fi
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Abstract

The energies and charge-state fractions of carbon plasma ions produced with the pulsed arc-discharge system have been measured using the Doppler-shifts in the line spectra emitted by carbon ions. The arc-discharge voltages ranged from 3 to 4 kV and the corresponding currents from 7.5 to 10 kA. Pulse duration times were about 30 μs. Strong populations of doubly and triply ionized carbon ions were observed. The maximum ion energy for the triply ionised carbon ions was 250 eV. The Doppler-shift measurements were performed with a crossed-dispersion spectrograph (theoretical spectral resolution 0.01 nm) and the lines were photographed.

Keywords

Type
Retracted Article
Information
The European Physical Journal - Applied Physics , Volume 22 , Issue 2 , May 2003 , pp. 111 - 114
Copyright
© EDP Sciences, 2003

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