44 Result(s)
-
Article
INITIAL STAGE OF AN OBLIQUE IMPACT OF A LARGE SOLID SPHERE ON A WATER LAYER
An oblique impact of a spherical segment with a curvature radius of 106.5 mm onto a water layer 20 mm thick is studied up to the instant of the body–liquid contact. The range of the impact angle with respect t...
-
Article
Discharge System with a Self-Heated Hollow Cathode and an Evaporating Anode in a Cusp Magnetic Field for Oxide Coatings Deposition
The properties of a discharge with a self-heated hollow cathode and an evaporating anode placed in a cusp magnetic field created by two oppositely connected coils installed near the anode and cathode are studi...
-
Article
Thermal regime of self-heated hollow cathode in a low-pressure high-current pulsed-periodic discharge
We have studied the thermal regime of a self-heated hollow cathode in combined low-current (1–5 A) dc discharge and high-current (up to 100 A) pulsed-periodic discharge and the influence of the pulsed paramete...
-
Article
Nanocrystalline α-Al2O3 coatings obtained by reactive thermal anodic evaporation in arc discharge at low temperature
Al2O3 nanocrystalline coatings are obtained for the first time by anodic thermal evaporation of aluminum in an arc discharge in an oxygen–argon mixture at a temperature of 600°C on stainless-steel substrates with...
-
Article
Generation of a pulsed high-current low-energy beam in a plasma electron source with a self-heated cathode
The transition of a low-current discharge with a self-heated hollow cathode to a high-current discharge is studied, and stability conditions for the latter in the pulsed–periodic mode with a current of 0.1–1.0...
-
Article
Nitriding of stainless steel in plasma of a pulse electron beam
The formation of a hardened layer with low-temperature (400°C)nitriding of grade 12Kh18N10T stainless steel in plasma of a pulse electron beam which is generated under continuous and pulse conditions at equal ...
-
Article
Self-oscillating mode of electron beam generation in a source with a grid plasma emitter
Plasma processes and electron beam generation in an electron source with a grid plasma cathode are investigated. Experiments are conducted under the conditions of efficient electron extraction and an intense c...
-
Article
Potential of an insulated electrode in a high-energy electron flow under a gas pressure of 0.1–1.0 Pa
We analyze the variation of the floating potential of an insulated metallic electrode in a flow of electrons with an energy of up to 300 eV under a gas pressure of 0.1–1.0 Pa at a current density lower than 0....
-
Article
Experimental study of the transition to high-current regime of discharge with a hollow self-heated titanium cathode in nitrogen
It is established that rapid formation of a nitride layer on the surface of a self-heated hollow titanium cathode in arc discharge in nitrogen leads to an increase in the thermal stability and emissive propert...
-
Article
Effect of the electron beam and ion flux parameters on the rate of plasma nitriding of an austenitic stainless steel
The method of nitriding of metals in an electron beam plasma is used to change the current density and energy of nitrogen ions by varying the electron beam parameters (5–20 A, 60–500 eV). An electron beam is g...
-
Article
Experimental study of disk impact onto shallow water
A problem of the impact of circular disks with a flat, convex, or concave onto a finite-depth fluid layer is experimentally studied. The influence of the small curvature of the lower surface of the body on the...
-
Article
Effect of generator shape on the structure of internal wave beams in a uniformly stratified fluid
The generation of internal waves by vibrating cylinders with cross sections of various shapes is studied experimentally. It is shown that at large distances from the generator, the profile of the perturbation ...
-
Article
Effect of the nonmonotonic temperature dependence of water density on free convection from a linear heat source
This paper presents the results of experimental studies of free convection from a heated wire in water for the two cases where the water temperature is higher or lower than the temperature at which water has m...
-
Article
Finite-amplitude solitary waves in a two-layer fluid
Second-mode nonlinear internal waves at a thin interface between homogeneous layers of immiscible fluids of different densities have been studied theoretically and experimentally. A mathematical model is propo...
-
Article
Low-temperature nitriding of titanium in low-energy electron beam excited plasma
The effect of an electron beam and the related plasma on the structure, phase state, and microhardness of the surface of titanium has been studied in a broad range of beam currents (0.1–2.5 A), electron energi...
-
Article
Diamond-like a-C:H coatings deposited in a non-self-sustained discharge with plasma cathode
Hydrogenated amorphous carbon (a-C:H) coatings have been obtained by means of acetylene decomposition in a non-self-sustained periodic pulse discharge (2A, 50 kHz, 10 μs) with hollow cathode. The discharge ope...
-
Article
Intense emission from a grid-stabilized plasma cathode
Intense emission from a grid-stabilized plasma cathode based on a glow discharge with an expanded anode area is studied. In the electrode system of the ion source, the potential difference between a large-mesh...
-
Article
Extension of the gas-pressure operating range and increase in the lifetime of the plasma cathode grid of an ion source
A new scheme of a gas-discharge system is proposed for a basket-type ion source with a plasma cathode in which the electrons are emitted from the expanded anode part of a constricted hollow-cathode glow discha...
-
Article
Experimental study of the influence of the processes in the ion-beam drift space on beam current measurements
A method is proposed for separate measurements of the current produced by slow charge-exchange ions and that produced by the ions generated due to gas ionization by the beam ions and fast secondary electrons i...
-
Article
Operational characteristics of a plasma cathode with a grid stabilization in a two-stage ion source
The discharge characteristics and the parameters of the cathode plasma in a two-stage ion source with a grid plasma cathode and a magnetic trap in the anode region are investigated. It is shown that an increas...
