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Digitale Medien

Negative ion effects in CO2 convection laser discharges (1978)

Shields, H. ; Smith, A. L. S.

Springer

Applied physics 16 (1978), S. 111-118

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Details

ISSN: 1432-0630

Schlagwort(e): 42.55D

Quelle: Springer Online Journal Archives 1860-2000

Thema: Maschinenbau , Physik

Notizen: Abstract Negative ions are computed to be formed on a time scale and in quantities such that they may be a cause of plasma instability observed in low pressure electrical discharge convection CO2 lasers. In a typical CO2−N2−He−H2O laser mixture the principal ions are CO 3 − , CO 4 − and H− with the total negative ion densityn − given by 0.1n e 〈n −〈n e , wheren e is the electron density: but if the gases are re-cycled or if there is an air leak NO 2 − and NO 3 − are formed in significant amounts andn − can become greater thann e in a time considerably less than the gas dwell time in the electrical excitation discharge. CO is effective in reducingn − in a system without re-cycling, but is ineffective in a re-cycled system with the oxides of nitrogen present.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00931431

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