INVESTIGATION OF AN IONIZED GAS BY MEANS OF WEAK ELECTRIC ALTERNATING FIELDS. 2. PRODUCTION OF FORCED OSCILLATIONS IN THE INTERIOR OF THE GAS

Journal Article · Wed Jan 01 04:00:00 EST 1958 · Acta Physica Austriaca (Austria)

OSTI ID:4283383

Szekely, A

The conductance and capacitance of a condenser which is filled with the plasma of a glowing cathode lowpressure discharge have abnormal values at numerous frequencies in the range from 1 to 10 MHz. It was determined that the curve of the dependence of the anode current deviates from normal patterns. For clarification it was assumed that forced oscillations were produced in the interior of the gas by the measuring voltage. The curves on the frequency dependence of the conductance and capacitance in the anode current permit the detection of two resonances which lie in the frequency at which weak self-excited oscillations are observed. It was concluded that in the range of these frequencies ordered forced oscillations of the plasma electrons occur under the influence of the measuring voltage since the ionixation condenser behaves as a quartz oscillator. The conductance has a maximum at the resonance and increases sharply over the normal without oscillation to the expected value. The capacitance variation is zero at the resonance and has varying signs before and aftee the resonance. In a schematic form the comparison of the plasma with the quartz oscillator was used for the introduction of the piezo and elasticity modulus, from which it is shown that the eigen frequency of the plasma was determined by the electric field strength in the plasma surface layer, the lower in the cathode side surface layer, the higher in the surface layer in the face of the condenser. In addition to the ordered oscillations of the plasma electrons unordered oscillations were produced by the measuring voltage; such unordered oscillations must be considered for the clarification of the lowering of the conductance under the normal value in the frequency range around 3 MHz. (tr- auth)

• Research Organization: Univ. of Graz, Austria
• NSA Number: NSA-13-004064
• OSTI ID: 4283383
• Journal Information: Acta Physica Austriaca (Austria), Journal Name: Acta Physica Austriaca (Austria) Vol. Vol: 12; ISSN APASA
• Country of Publication: Country unknown/Code not available
• Language: German

Related Subjects

ANODES
CAPACITORS
CATHODES
CURRENTS
DIAGRAMS
ELASTICITY
ELECTRIC CONDUCTIVITY
ELECTRIC DISCHARGES
ELECTRIC FIELDS
ELECTRIC POTENTIAL
ELECTRONS
EXCITATION
FREQUENCY
GASES
IONIZATION
LAYERS
MEASURED VALUES
OSCILLATIONS
PHYSICS AND MATHEMATICS
PIEZOELECTRICITY
PLASMA
PRESSURE
QUARTZ
RESONANCE
SURFACES
VARIATIONS