Spectral-interferometry measurements of copper atom concentration in a segmented hollow cathode discharge

L. Szalai, M. Ulbel, T. Neger, G. Pretzler, Z. Donkó, K. Rózsa, R. C. Tobin

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We report spectral-interferometry measurements of the concentration and the spatial distribution of copper vapor in a high voltage, segmented hollow cathode discharge, which is an efficient source for laser light generation. The concentration of sputtered copper atoms was found to be in the order of 1014 cm-3 at currents of 0.6-1.0 A in a 5 cm long, 4 mm bore diameter discharge tube, operating in argon buffer gas. At high pressures and relatively low current densities the sputtered metal concentration forms two maxima near the cathode surface. With increasing current and decreasing pressure these two maxima move towards the center of the discharge. This result may account for the fact that at certain discharge parameters the segmented hollow cathode lasers operate in higher order transverse modes near the threshold. The measurements of copper vapor concentration show increased sputtering compared to conventional hollow cathodes, which is considered to be one of the reasons for segmented hollow cathode metal ion lasers being more efficient.

Original languageEnglish
Pages (from-to)771-777
Number of pages7
JournalZeitschrift fur Naturforschung - Section A Journal of Physical Sciences
Volume52
Issue number11
Publication statusPublished - Nov 1997

Fingerprint

atom concentration
hollow cathodes
Interferometry
Copper
interferometry
Cathodes
copper
Atoms
Laser
Metals
vapors
Lasers
lasers
gas discharge tubes
Vapors
Sputtering
Gas discharge tubes
low currents
Spatial Distribution
Argon

Keywords

  • Gas lasers
  • Glow discharges
  • Optical interferometry
  • Optical spectroscopy
  • Sputtering

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

Spectral-interferometry measurements of copper atom concentration in a segmented hollow cathode discharge. / Szalai, L.; Ulbel, M.; Neger, T.; Pretzler, G.; Donkó, Z.; Rózsa, K.; Tobin, R. C.

In: Zeitschrift fur Naturforschung - Section A Journal of Physical Sciences, Vol. 52, No. 11, 11.1997, p. 771-777.

Research output: Contribution to journalArticle

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AU - Rózsa, K.

AU - Tobin, R. C.

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