THE INFLUENCE OF THE CATHODE REGION ON THE DYNAMIC PROPERTIES OF A GLOW DISCHARGE IN HYDROGEN

Journal Article · Wed Jan 01 04:00:00 EST 1958 · Czechoslov. J. Phys.

DOI:https://doi.org/10.1007/BF01572186· OSTI ID:4186035

Krejei, V

Short voltage pulses were applied to a glow discharge in spectrally pulse hydrogen, maintained by direct current. These pulses brought the discharge into a non-stationary state. The return to the stationary state is brought about by a stablilizing process which caused changes in the voltage at the discharge, which were depicted on an oscillograph. At pressures of 0.3 to 1.5 mm Hg the stabilizing process had the form of periodically damped oscillations. The frequency of these oscillations was measured as a function of different parameters, including the capacity of the condenser C/sub x/, connected in parallel to the discharge. The results of this measurement are shown on oscillograms. For higher values of the capacity C/sub x/ and lower pressures these curves differ from analogous dependences found in inert gases. By measuring the same dependences tor different surfaces of the cathode it was found that the different course of the curves in hydrogen pendences for different surfaces of the cathode it was found that the different course of the curves in hydrogen is caused by the influence of the energies amassed in the cathode region of the discharge. In order to clarify the measured dependences an equivalent circuit was proposed, composed of three parts: an equivalent circuit of the positive column of the discharge (elements R/sub s/, L/sub s,/, and, C/sub s/), of the cathode region (L/sub k/, R/sub k/, and C/sub k/) and of the external circuit (R/sub v/and C/sub v/). The elements /sub s/, C/sub s/, L/sub k and C/ sub k/ represent different stores of energy in the lischarge. Basic equations were constructed for the voltages and currents in this circuit and solved for initial conditions. Laplace-Carson transformations were used for the solution. The resultant course of the voltages in the discharge is in qualitative agreement with the course found oscillographically. An approximate expression was also calculated for ihe constant b, determining the frequency of the oscillations produced and for the quantity da/dC/sub v/, which according to the results of measurement should be positive. By substituting the order-of-magnitude constants of the equivalent circuit into the calculated relations we found order-of- magnitude agreement with the results of measurements. (auth)

• Research Organization: Czechoslovak Academy of Sciences, Prague
• Sponsoring Organization: USDOE
• NSA Number: NSA-14-005937
• OSTI ID: 4186035
• Journal Information: Czechoslov. J. Phys., Journal Name: Czechoslov. J. Phys. Vol. Vol: 8
• Country of Publication: Country unknown/Code not available
• Language: Russian

Related Subjects

CAPACITORS-- CATHODES-- CURRENTS-- DAMPING-- DIAGRAMS-- ELECTRIC POTENTIAL-- ENERGY-- FREQUENCY-- GLOW DISCHARGES-- HYDROGEN-- MEASURED VALUES-- OSCILLATIONS-- OSCILLOGRAPHS-- PRESSURE-- PULSES-- STABILITY-- SURFACES
CAPACITORS-- CIRCUITS-- CURRENTS-- DIFFERENTIAL EQUATIONS-- ELECTRIC CONDUCTIVITY- - ELECTRIC DISCHARGES-- ELECTRIC POTENTIAL-- ENERGY-- FREQUENCY-- INDUCTION-- OSCILLATIONS-- STORAGE
PHYSICS