Valeriy Dondokovich Dugar-Zhabon

Valeriy Dondokovich Dugar-Zhabon
Industrial University of Santander | UIS · Facultad de Ciencias, Escuela de Física

About

66
Publications
11,075
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145
Citations
Citations since 2016
25 Research Items
115 Citations
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2016201720182019202020212022051015202530
2016201720182019202020212022051015202530

Publications

Publications (66)
Article
Full-text available
The surface modification of silicon sheets with titanium and titanium+nitrogen is presented by means of a hybrid high voltage pulsed discharge and electric arc in a vacuum. The spectral diagnostic shows an approximate value of the temperature of the titanium cathode in the hybrid discharges of 7127 ± 200 K and in the arc discharges of 8888 ± 767 K....
Article
Full-text available
There are many particle acceleration mechanisms using electromagnetic waves and external magnetic fields where the electron cyclotron resonance condition is preserved. Among these mechanisms, the gyroresonant acceleration proposed by K. Golovanivsky consists of the 2D acceleration of electrons by a circular polarized standing transversal electric w...
Article
Full-text available
The spatial auto-resonant acceleration scheme consists in the acceleration of an electrons beam by the transverse electric field component of a standing microwave field and an external inhomogeneous magnetostatic field, whose longitudinal profile is fitted to maintain the electron cyclotron resonance condition along of its helical trajectories. In...
Article
Full-text available
Determining the charged particle trajectories in the inhomogeneous electric and magnetic fields is the common problem in the plasma physics. For the tokamak plasma, the orbits of the captured fast ions are affected both by the curvature and gradient of the magnetic field. In the present work, the fast ion trajectories and their guiding-centre orbit...
Article
Full-text available
The magnetohydrodynamic equilibrium is the starting point to study macro- instabilities in a confined plasma; for the particular case, where the system is axially symmetric, the static and stationary equilibrium is due by the Grad-Shafranov equation. We present the equilibrium state for a toroidal plasma confined by a spherical Tokamak with aspect...
Article
Full-text available
The magnetron sputtering of cathode material is one of the ways of producing a thin film deposition on solid surfaces and maintaining the cathode system under a certain potential. Recently, some experimental study of a magnetron sputtering system with the segmented cathode at different electric potential on each segment has been conducted. It allow...
Article
Full-text available
In the industry of hard coatings, the vacuum arc evaporator is one of the commonly used devices due to its high productivity, reliability and ability to operate in a non-gaseous medium. Apart from this, the imposition of an external magnetic field allows to control the localization of the arc spots both on the simple and sectioned (i.e. made from d...
Article
Full-text available
Electron cyclotron ion sources producing multicharged ion beams of high intensity are widely used in scientific and industrial technologies. To multiply ionize heavy atoms. the electron component of a plasma confined in a magnetic trap is energized by microwaves in the cyclotron resonance conditions. The design of the existing sources does not perm...
Article
Full-text available
The experimental investigations carried out in the Plasma laboratory of the Universidad Industrial de Santander, on superficial modification of metallic materials by hybrid discharges of high-voltage and electric arc at low pressures are carried out in the joint universal plasma and ion technologies experimental reactor. The cooling system of the r...
Article
Full-text available
In this work we present a numerical scheme to solve the Grad-Shafranov equation which correspond to magnetohydrodynamic equilibrium equation for a two-dimensional plasma. A typical case are the toroidal plasma in magnetic confinement devices used in thermonuclear fusion well known as Tokamaks. The proposed numerical scheme is based on the finite-di...
Poster
Full-text available
In this work, we present the results of numerical simulation of the plasma heating in the discharge chamber of an ECRIS by using a C++ electromagnetic particle in cell (PIC) code developed by us, where the electromagnetic field is calculated using the Yee’s method and the magnetostatic field of the minimum-B magnetic trap is calculated numerically...
Thesis
Full-text available
Las fuentes de iones de resonancia ciclotrónica electrónica (por sus siglas en inglés, ECRIS), son dispositivos mayormente diseñados para generar haces de iones altamente cargados. En estos sistemas, una trampa magnética mínimo-B está formada por la superposición de un campo magnético axial producido por un par de bobinas de corriente y un campo ma...
Preprint
Full-text available
A lot of plasma physics problems are not amenable to exact solutions due to many reasons. It is worth mentioning among them, for example, nonlinearity of the motion equations, variable coefficients or non lineal conditions on known or unknown borders. To solve these problems, different types of approximations which are combinations of analytical an...
Article
Full-text available
Now there are numerous sources for multicharged ions production, each being designed for certain science or technological objectives. Electron cyclotron resonance ion sources (ECRIS) are best suited for designing heavy ion accelerators of very high energies, because they can generate multicharged ion beams at relatively great intensities. In these...
Article
Full-text available
Objective: In this present research work the behaviour of temperature of the substrate manufactured in AISI H13 steel, in the range of and , during of surface deposition of titanium nitride (TiN) thin films by the technique of cathodic arc in vacuum. Results: The physical properties of the TiN films were obtained and analysed by the techniques of m...
Article
Full-text available
T he three-Dimensional Ion Implantation technique (3DII) causes ions to collide with a solid surface in a perpendicular way regardless of the geometry of the solid (Khvesyuk & Tsygankov, 1997; Dougar-Jabon, Dulce-Moreno & Tsygankov, 2002). The steel AISI SAE 4140 has been used as substrate because of its wide use in the transport of oil industry, t...
Article
Full-text available
The space cyclotron autoresonance interaction of an electron beam with microwaves of TE 102 rectangular mode is simulated. It is shown that in these conditions the beam electrons can achieve energies which are sufficient to generate hard x-rays. The physical model consists of a rectangular cavity fed by a magnetron oscillator through a waveguide wi...
Article
Full-text available
This research seeks to implement a web application to estimate the total charge in an electric discharge from the experimental parameters established in reactors such as the JUPITER-MOSMET [1-5], used to perform surface modifications of metallic and nonmetallic species in solids substrates by hybrid discharges pulsed of high voltage and electric ar...
Article
Full-text available
The experimental set for artificially modulated structures production through an advanced vacuum arc evaporator with a magnetically-driven cathode spots on the cathode surface is described. The main features of vacuum arc as a vapor source with time-modulated compositions are discussed. The characteristics of the obtained multilayer coatings with a...
Article
Full-text available
This work analyzes through computational methods the phenomenon of confinement and heating of plasmas, in open magnetic traps, Minimum-B, and zero-B under conditions of resonance electron cyclotron (ECR). This simulation is made using electrostatic particle in cell method. First, it simulates the minimum-B trap, which has been studied both numerica...
Article
Full-text available
The magneto-statics field from a parallelepiped magnet which can turn around an axis, is the first step to find the whole magnetic field in a multipolar configuration. This configuration is present in the ion sources, which are heated by electron cyclotron resonance. We present the analytic formulas to calculate this magnetic field outside the volu...
Article
Full-text available
The results of full electromagnetic simulations of the electron beam acceleration by a TE 112 linear polarized electromagnetic field through Space Autoresonance Acceleration mechanism are presented. In the simulations, both the self-sustaned electric field and selfsustained magnetic field produced by the beam electrons are included into the elabora...
Article
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Currently the study of the nonlinear plasma evolution in magnetostatic fields of complex asymmetrical configurations is possible only through computer simulations. The confinement efficiency of plasma by a magnetic zero-B trap which is comprised of longitudinal mirror and transversal hexapole cusp fields is determined through a particle-in-cell met...
Article
Full-text available
A hybrid technology to treat solid surfaces with the pulse high voltage and electric arc discharges of low pressure with a three-dimensional ion implantation technique (3DII) is applied. This technology is used to protect AISI SAE 1020 steel against a microbiological corrosion. The titanium ion implanted steel samples (coupons) are subjected to a m...
Patent
Full-text available
La presente invención divulga un dispositivo compacto capaz de producir rayos X duros de energía mayores que 200 keV, de no menor intensidad que las fuentes de rayos X tradicionales. En la fuente propuesta, los electrones inyectados por un extremo de la cavidad resonante metálica cilíndrica sometida al vacío se aceleran por microondas de un modo TE...
Article
Full-text available
In this paper, we present a method for improving the negative hydrogen ion yield in the electron cyclotron resonance source with driven plasma rings where the negative ion production is realized in two stages. First, the hydrogen and deuterium molecules are excited in collisions with plasma electrons to high-laying Rydberg and high vibration levels...
Article
Full-text available
La implantación iónica tridimensional (3DII) [1] es una técnica alternativa para el tratamiento superficial de materiales y es utilizada para mitigar el efecto de la corrosión en aceros de bajo carbono expuestos a medios agresivos [2]. En el presente trabajo se analiza el comportamiento frente a la corrosión de la superficie de muestras de acero AI...
Article
The three-dimensional ion implantation technique (3DII) is an alternative to the material surface treatment which is used to mitigate the corrosion effect in low carbon steels exposed to aggressive media. In this work, the behavior of the surfaces of AISI SAE 1020 steel modified with titanium ions in respect to corrosion is studied by using electro...
Article
Full-text available
A three-dimensional treatment method involving implantation of ions into solids immersed in a high voltage pulse discharge ignited on the left-hand-branch of the Paschen curve was elaborated about fifteen years ago. This method, named 3DII for short, has been used in the equipment JUPITER (Joint Universal Plasma and Ion Technologies Experimental Re...
Article
Full-text available
Of the plasma methods used to improve the tribological properties of the solid surface [1-3], the treatment of metal pieces in the hybrid discharge, which is a combination of high voltage and electric arc discharges, seems very promising [4,5]. This method is developed in the Plasma Physics and Technology Laboratory at the Universidad Industrial de...
Article
Full-text available
AISI SAE 4140 steel samples of different surface roughness which are implanted with 20 keV and 30 keV nitrogen ions at a dose of 1017 ions/cm2 are studied. The crystal phases of nitrogen compositions of the implanted samples, obtained with help of an x-ray diffraction method, are confronted with the data reported by the International Centre for Dif...
Article
Full-text available
El presente trabajo realiza un estudio comparativo de la influencia del contenido de carbono a la tasa de corrosión de aceros AISI SAE 1010, 1020 y 1045, empleando pruebas gravimétricas que se utilizan comúnmente en la industria de los hidrocarburos. Las superficies de las muestras gravimétricas (que se denominan también cupones) se tratan por desc...
Article
Full-text available
La implantación iónica tridimensional (3DII) [1] es una técnica de tratamiento superficial avanzado [2], la cual es realizada en el dispositivo JUPITER (Joint Universal Plasma and Ion Technologies Experimental Reactor) [3] mediante una descarga pulsada de alto voltaje a bajas presiones en un gas encendida en la rama izquierda de la curva de Paschen...
Article
Full-text available
Para realizar el estudio de los haces electrónicos en la descarga eléctrica de alto voltaje a bajas presiones se implementó el dispositivo JUPITER (Joint Uniersal Plasma and Ion Tecnologies Experimental Reactor) que está fundamentado en las ideas de implantación iónica tridimensional (3DII) y un sistema de reglas especiales de acrilico que determin...
Article
Full-text available
Recibido 30.03.10; Aceptado 20.06.11; Publicado en línea 04.09.11. Resumen Se estudia un vaporizador de arco con el cátodo de titanio que es destinado para desarrollar una tecnología de películas protectoras de metales. Se muestra que a pesar de que el vaporizador se alimenta por un voltaje constante la descarga de arco se enciende en un régimen de...
Article
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El sector productivo actualmente se ha interesado en el estudio de fenomenologías que involucren mitigar el deterioro por corrosión de los materiales allí empleados, como el desarrollo de nuevos materiales o la aplicación de recubrimientos. En este trabajo se presenta el desarrollo de un nuevo tratamiento (Implantación iónica tridimensional – 3DII)...
Article
Full-text available
En las fuentes modernas de iones multicargados el calentamiento del plasma y su confinamiento se realiza en condiciones de resonancia ciclotrónica electrónica a cuenta de la energía de microondas. El problema de la inyección de microondas en las cámaras de descarga de fuentes iónicas todavía no es bien estudiado a pesar de que la efectividad de abs...
Article
Full-text available
Resumen La implantación iónica tridimensional (3DII), es una técnica de tratamiento superficial avanzado, la cual es realizada en el dispositivo JUPITER (Joint Universal Plasma and Ion Technologies Experimental Reactor) mediante una descarga pulsada de alto voltaje a bajas presiones. El presente trabajo busca mediante la caracterización superficial...
Article
We evaluate and characterize the surface at the nanoscale level and take into account the temperature variation effect in the process of plasma ion deposition for H13 steel samples coated by Titanium Nitride (TiN). The interferometric microscopy and atomic force microscopy (AFM) were used to measure the film to analyze the variation of structural a...
Article
Full-text available
Plasma structure and electron ring formation in a magnetic mirror trap under electron cyclotron resonance (ECR) conditions is studied numerically through a simulation of the Newton-Lorentz equation by a particle-in-cell method. The plasma self-generated electric field is calculated through a numerical solution of the Poisson equation with the help...
Article
The relativistic dynamics of an electron beam which is accelerated by a circular polarized standing electromagnetic wave in an axisymmetric steady-state magnetic field under cyclotron-resonance conditions is studied. The profile of the inhomogeneous magnetic field is chosen such as to maintain the beam electrons in the space cyclotron autoresonance...
Article
The relativistic dynamics of an electron beam which is accelerated by a circular polarized standing electromagnetic wave in an axisymmetric steady-state magnetic field under cyclotron-resonance conditions is studied. The profile of the inhomogeneous magnetic field is chosen such as to maintain the beam electrons in the space cyclotron autoresonance...
Article
Full-text available
An autoresonance electron acceleration phenomenon in the combined steady-state inhomogeneous magnetic and microwave fields is analytically studied. Equations describing the evolution of the phase shift between the particle velocity and the microwave electric field, total energy, and longitudinal velocity of the electron are obtained. Linear and par...
Article
An experiment demonstrating an important role of a hot electron layer in a ECR plasma on potential well formation is described. It is shown by direct measurements that the charge state of ions is drastically increased while an annular hot electron layer appears. The charge states up to 9 are observed in argon gas while microwave power is 100 W at ω...
Article
Short review of present status of development is given, and physical principles of ion sources designed for electron-cyclotron heating of a plasma in a magnetic mirror are described. Characteristics of electron-cyclotron resonance (ECR) sources of negative and positive ions are given. ECR-sources have unlimited service life, are reliable, simple in...
Article
The GELIOS-H/sup /minus// ion source is described; it has electron cyclotron resonance and is designed for generation of negative hydrogen and deuterium ions. The source consumes up to 100 W of microwave power at a frequency of 2.4 GHz and provides a stationary beam of H/sup /minus// ions of up to 1.5 mA and D/sup /minus// ions of up to 1.0 mA for...
Article
A prototype of the HELIOS-12 single-chamber multiply charged ion source is described, which operates on the principle of electron cyclotron resonance and is designed for pulsed ion accelerators. The magnetic system of the source, which forms both longitudinal and transverse (hexapole) fields, contains only permanent magnets of SmCoâ. The source ope...
Article
An experiment was performed to study the charge composition of ions in an electron-cyclotron-resonance discharge in argon in a magnetic-mirror confinement system with a three-dimensional potential well for ions. The charge state distribution of the ions from the paraxial region of the beam extracted from the discharge is shown. Ar(7+) ions are show...
Article
Experiments and numerical simulations have been carried out to determine how cyclotron-resonance rf fields in an open magnetic mirror system affect the capture and confinement of a plasma injected along the axis. The results show that at electron cyclotron resonance the fields greatly improve the longitudinal plasma confinement.
Article
magnetic field and a stationary microwave field is studied. The space profile of the axially symmetric magnetic field is fitted to maintain the interaction of electrons with the microwave field of cyclotron resonance type on all their trajectories. The Newton-Lorentz equation is simulated simultaneously with the Poisson equation by using the partic...
Article
Physical principles are described and a brief summary is given of the current state of development of ion sources based on electronic cyclotron resonance (ECR) heating of plasma in a mirror-type machine. Characteristics of ECR sources are presented for positive and negative ions used chiefly in acceleration technology.

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