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• W136680869 abstract "A measurement method is described which permits the wave parameters of an advancing wave to be measured at an arbitrary site with respect to a strong coherent signal. The application of the phase difference measurement method is limited to a stationary plasma in which the complex dielectric constant is temporally independent. The contribution and direction of the phase velocity and the group velocity of the broadening waves were determined. On the basis of these methods it was possible during measurements on the plasma cable to distinguish between a forward wave (a wave with corresponding direction of phase and group velocity) and a backward wave (a wave in which these directions are opposite). The method did not permit with stationary'' waves the separation of these waves from each other and the detection of the existence of a backward wave whose occurrence was limited by a finite value of the concentration of the charge carrier at the plasma boundary. The complete comprehension of the broadening parameter through the phase difference method leads to the detection of the effects of the electron drift velocity on the wave broadening. The contribution of the drift velocity in a nonisothermal stationary low pressure mercury discharge wasmore » determined. The application of the phase difference method necessitates an advancing wave in the plasma cable which is not perturbed by reflection. The plasma cable therefore was reflection-free. The damping of the advancing wave is shown from the comparison of the amplitudes of two receiving sites. Through logarithmic calibration of the indicator instruments at the collection outlet, the damping value could be read directly in Neper/cm. The conductivity of the plasma was determined from the measured damping values at low frequencies. At known electron concentrations, which result from the limiting frequency of the transfer range, the impact number of electrons is obtained from the measured value of the conductivity. The value agrees uell with the values obtained from probe measurements. For the existence of a dependent gas discharge the region filled by the plasma is of secondary importance. The plasma serves only for the transmission of the current between the anode and the cathode drop region of the discharge and represents a conductor with relatively poor conductivity. The measurements carried out at low frequencies (l.2 Mc) on the plasma cable have ratified this behavior. (tr-auth)« less" @default.
• W136680869 created "2016-06-24" @default.
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• W136680869 date "1961-10-01" @default.
• W136680869 modified "2023-09-24" @default.
• W136680869 title "THE BROADENING OF SLOW ELECTROMAGNETIC WAVES IN A PLASMA CABLE" @default.
• W136680869 hasPublicationYear "1961" @default.
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