Experimental Investigations Of Microsecond Range Plasma Current Switch

2005 ◽  
Author(s):  
G.I. Dolgachev ◽  
L.P. Zakatov ◽  
A.G. Ushakov
Keyword(s):  
Experimental Investigations ◽  
Plasma Current ◽  
Current Switch

scholarly journals RADIATION LOSS DETERMINATION AT COLLISION OF ELECTRONS WITH LECTRONEGATIVE ATOMS AND IONS IN PLASMA CURRENT SWITCH DISCHARGES. PART II

2021 ◽  
pp. 85-88
Author(s):  
E.I. Skibenko ◽  
V.B. Yuferov ◽  
A.N. Ozerov ◽  
I.V. Buravilov
Keyword(s):  
Particle Concentration ◽  
Power Level ◽  
Radiation Loss ◽  
Plasma Current ◽  
Impurity Particle ◽  
Current Voltage Characteristic ◽  
Plasma Parameters ◽  
Current Switch ◽  
Radiation Losses ◽  
Current Voltage

Specific radiation-loss power values have been determined for a variety of electronegative elements (C, O, F, Cl) as functions of electron temperature and impurity particle concentration. The maximum radiation-loss power level has been registered for chlorine (≤770 W/cm3) at an electron/impurity density of 1014 cm-3. The minimum radiation-loss power level for the other three elements lies in the range from 0.4 to 2 W/cm3. Considerable radiation losses due to the presence of electronegative elements in the interelectrode discharge may lead to its destabilization, to the change in the plasma parameters (ne, Te), and eventually, to degradation of the current-voltage characteristic of the plasma current switch.

scholarly journals GENERAL CHARACTERIZATION AND IONIZATIONRECOMBINATION PROPERTIES OF ELECTRONEGATIVE ELEMENTS PRESENT IN PLASMA DISCHARGES AT PLASMA CURRENT SWITCH OPERATION. PART I

2021 ◽  
pp. 11-17
Author(s):  
E.I. Skibenko ◽  
V.B. Yuferov ◽  
A.N. Ozerov ◽  
I.V. Buravilov
Keyword(s):  
Electron Temperature ◽  
Electron Affinity ◽  
Experimental Studies ◽  
Plasma Current ◽  
Plasma Discharges ◽  
Ionization Equilibrium ◽  
Atomic Ions ◽  
Current Switch ◽  
Switch Operation ◽  
Literary Sources

Based on literary sources, we present here the data on electron affinity values for a variety of negative atomic ions, and also, for some molecules and radicals being of interest for current experimental studies. Besides, the ionization potentials are given for nearly all ionization states of some electronegative elements (C, O, F, Cl). For the said elements, the ionization-recombination parameters and the dependences of the fractional values (ionic fraction) for ionization states and on the electron temperature within the framework of ionization equilibrium are given. A comparison is carried out between the calculated and experimental distributions of the fractions of multicharged C+4 ions versus electron temperature.

scholarly journals SMALL-SIZE DIRECT-ACTION ELECTRON ACCELERATOR WITH A HIGH-EFFICIENCY NANOSECOND PLASMA-CURRENT SWITCH

2019 ◽  
pp. 10-14
Author(s):  
E.I. Skibenko ◽  
V.B. Yuferov
Keyword(s):  
Electron Accelerator ◽  
High Efficiency ◽  
Direct Action ◽  
Operating Parameter ◽  
Switching Frequency ◽  
Plasma Current ◽  
Current Switch ◽  
Operating Modes ◽  
Current Electron ◽  
High Current Electron

The paper presents the results of a study undertaken to determine operating modes for a small-size direct-action electron accelerator with a high-efficiency nanosecond plasma-current switch (PCS). The investigations have shown that using PCS as a base it is possible to develop small-size nanosecond pulsed high-current electron accelerators with a voltage pulse sharpening coefficient of about 12, beam (flow) electron energy of 300…400 keV and current of 100 kA for pulse duration of 30 ns. The ways for improving the PCS and accelerator operating parameter stability, increasing the switching current and maximum accessible switching frequency are proposed.

Experimental investigations of the use of cartilage in tympanic membrane reconstruction

2000 ◽  
Vol 21 (3) ◽  
pp. 322-328 ◽  
Author(s):  
T ZAHNERT ◽  
K HUTTENBRINK ◽  
D MURBE ◽  
M BORNITZ
Keyword(s):  
Tympanic Membrane ◽  
Experimental Investigations

EXPERIMENTAL INVESTIGATIONS OF THE QUANTUM PHOTOVOLTAIC EFFECT IN InAs-GaSb SEMICONDUCTOR SUPERLATTICES

1987 ◽  
Vol 48 (C5) ◽  
pp. C5-183-C5-186
Author(s):  
J. BLEUSE ◽  
P. VOISIN ◽  
M. VOOS ◽  
L. L. CHANG ◽  
L. ESAKI
Keyword(s):  
Photovoltaic Effect ◽  
Experimental Investigations ◽  
Semiconductor Superlattices

Evaluation of the accuracy of reconstruction of the electrophysical and geometric parameters of multilayer dielectric coatings by the multi-frequency radio wave method of a slow surface electromagnetic waves

2020 ◽  
pp. 51-58
Author(s):  
Aleksandr I. Kazmin ◽  
Pavel A. Fedjunin
Keyword(s):  
Radio Wave ◽  
Noise Level ◽  
Electromagnetic Waves ◽  
Dielectric Materials ◽  
Geometric Parameters ◽  
Experimental Investigations ◽  
Wave Method ◽  
Dielectric Coatings ◽  
Surface Electromagnetic Waves ◽  
Multilayer Dielectric

One of the most important diagnostic problems multilayer dielectric materials and coatings is the development of methods for quantitative interpretation of the checkout results their electrophysical and geometric parameters. The results of a study of the potential informativeness of the multi-frequency radio wave method of surface electromagnetic waves during reconstruction of the electrophysical and geometric parameters of multilayer dielectric coatings are presented. The simulation model is presented that makes it possible to evaluate of the accuracy of reconstruction of the electrophysical and geometric parameters of multilayer dielectric coatings. The model takes into account the values of the electrophysical and geometric parameters of the coating, the noise level in the measurement data and the measurement bandwidth. The results of simulation and experimental investigations of reconstruction of the structure of relative permittivitties and thicknesses of single-layer and double-layer dielectric coatings with different thicknesses, with different values of the standard deviation (RMS) of the noise level in the measured attenuation coefficients of the surface slow electromagnetic wave are presented. Coatings based on the following materials were investigated: polymethyl methacrylate, F-4D PTFE, RO3010. The accuracy of reconstruction of the electrophysical parameters of the layers decreases with an increase in the number of evaluated parameters and an increase in the noise level. The accuracy of the estimates of the electrophysical parameters of the layers also decreases with a decrease in their relative permittivity and thickness. The results of experimental studies confirm the adequacy of the developed simulation model. The presented model allows for a specific measuring complex that implements the multi-frequency radio wave method of surface electromagnetic waves, to quantify the potential possibilities for the accuracy of reconstruction of the electrophysical and geometric parameters of multilayer dielectric materials and coatings. Experimental investigations and simulation results of a multilayer dielectric coating demonstrated the theoretical capabilities gained relative error permittivity and thickness of the individual layers with relative error not greater than 10 %, with a measurement bandwidth of 1 GHz and RMS of noise level 0,003–0,004.

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