Messung relativer Radialprofile der Ionendichte in einer Argon‐Hochstrom‐Niederdruckentladung mittels resonanter Laserlichtstreuung

Schubert, M.; Bergmann, J. F.

doi:10.1002/ctpp.19790190505

Contrib Plasma Phys

1979

DOI: 10.1002/ctpp.19790190505

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Messung relativer Radialprofile der Ionendichte in einer Argon‐Hochstrom‐Niederdruckentladung mittels resonanter Laserlichtstreuung

M. Schubert¹,

J. F. Bergmann²

Abstract: Eingegangen uiii 3. Oktober 19XIItntlial ion density profiles have been measured in an argon high current low pressure discharge by n laser resonance scattering technique with a high spatial resolution in the range of 100 : i m . For c4ectron temperatures at 2 eV in segmented dischurge channels a radial dependence of averaged electron impact excitation cross section seems to be probnble. The influence of several kinetic effects of ions on the measurements has been discussed.

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1980

1993

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Cited by 3 publications

References 8 publications

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Lokale Messung von Driftgeschwindigkeit und Temperatur der Ionen einer Argon‐Niederdruckentladung mit resonanter Laserstreuung

Bergmann¹,

Schubert²

1980

Contrib Plasma Phys

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A bs t pactThe radial ion drift velocity and temperature in an nrgon lor-pressure discharge have been me:tsuretl by n resonant laser scnttering method with high spatial resolution. The detection limit for the drift velocit.ies was 2 1 lo4 cm . 8-1. In the vicinity of the discharge axis the drift velocity grows linear with the distance from the axis. The mensurements have shown t.lie existence of a r d i d dependence of the ion temperntnre TL(7). Comparisons of nxial ion temperature 3' 1, with T,(r = 0) are an experimental demonst.rntion of the nnisotropy of the ion ve1oc.it.y distribution in this kind of discharges.

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Lokale Messung von Driftgeschwindigkeit und Temperatur der Ionen einer Argon‐Niederdruckentladung mit resonanter Laserstreuung

Bergmann¹,

Schubert²

1980

Contrib Plasma Phys

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Lokale Diagnostik einer Argon‐Niederdruckentladung mit Hilfe der resonanten Laserstreuung

Bergmann

Schubert

1984

Contrib Plasma Phys

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We report on the experimental investigations on a laser-like low pressure argon gas discharge. The discharge parameters varied in the range from 0,05 to 1 Torr for the gas pressure and from 10 to 30 A for the discharge current.Local electron densities and temperatures have been measured with an adjustable spherical probe.Spatially resolved measurements of the temperatures and drift velocities of the A+-ions in the radial and axial direction of the positive column have been carried out by the resonant laser light scattering (fluorescence technique).The radial density profiles of the excited Ar+-ions have been determined in two different ways and have been compared with the calculations based on a simple collisional radiative model.

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Laser‐Induced Fluorescence on a Metastable and a Resonant Argon Ion Level

Schubert

Valentini

1993

Contrib. Plasma Phys.

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Laser-induced fluorescence on metastable and on resonant argon ion levels and spontaneous emission have been measured in two similar dc-low pressure discharge configurations in dependence on gas pressure. Using a simple collision-radiative model and various approximations a few results about pump rate ratios, electron temperatures, laser-induced transition rates and relaxation rates from the metastable or resonant level are derived.

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Messung relativer Radialprofile der Ionendichte in einer Argon‐Hochstrom‐Niederdruckentladung mittels resonanter Laserlichtstreuung

Cited by 3 publications

References 8 publications

Lokale Messung von Driftgeschwindigkeit und Temperatur der Ionen einer Argon‐Niederdruckentladung mit resonanter Laserstreuung

Lokale Messung von Driftgeschwindigkeit und Temperatur der Ionen einer Argon‐Niederdruckentladung mit resonanter Laserstreuung

Lokale Diagnostik einer Argon‐Niederdruckentladung mit Hilfe der resonanten Laserstreuung

Laser‐Induced Fluorescence on a Metastable and a Resonant Argon Ion Level

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