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Vacuum Electronics and Plasma Diagnostics
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Vacuum Electronics and Plasma Diagnostics

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "F3: Power Electronics".

Deadline for manuscript submissions: closed (21 July 2022) | Viewed by 5003

Special Issue Editors

Dr. Vasily Kozhevnikov

E-Mail Website
Guest Editor
Laboratory of Theoretical Physics, Institute of High Current Electronics, SB RAS 2/3 Akademichesky Ave. 634055 Tomsk, Russia
Dr. Dmitry Sorokin

E-Mail Website
Guest Editor
Institute of High Current Electronics, SB RAS 2/3 Akademichesky Ave. 634055 Tomsk, Russia
Interests: plasma physics; optics; gas discharge; plasma diagnostics
Dr. Vladimir Denisov

E-Mail Website
Guest Editor
Institute of High Current Electronics, SB RAS 2/3 Akademichesky Ave. 634055 Tomsk, Russia
Interests: low temperature plasma physics, plasma diagnostics, gas and metal plasma sources, electron emission from plasma, plasma cathode electron sources, material surface modification, thin film synthesis, plasma-assisted deposition, application of beam-plasma formations synthesized by low-pressure discharges

Special Issue Information

Dear Colleagues,

Welcome to the Energies journal Special Issue entitled "Vacuum Electronics and Plasma Diagnostics". The main aim of this Special Issue is to present modern theoretical and experimental results revealing prospects to further fundamental research and promising practical applications. This Special Issue focuses on two broad areas of modern physics: vacuum electronics and plasma diagnostics. Vacuum electronics represents the branch of physical science associated with the phenomenon of charged particles’ transportation in an electromagnetic field in restricted spatial configurations. This section includes original and review papers covering various theoretical and experimental investigations of vacuum discharges, ion and electron beams, vacuum electron sources, vacuum tubes, and other related problems. Plasma diagnostics is another noteworthy theme of the current Special Issue. It covers topics connected to various methods, instruments, and experimental techniques used to measure the properties of plasma. The papers to be published here deal with invasive experimental probe methods, passive and active plasma spectroscopy, plasma electron cyclotron emission, Thomson scattering methods, neutron diagnostics for fusion plasmas, and many other topics of interest. Interdisciplinary research papers combining the fields of vacuum electronics and plasma diagnostics are highly encouraged. Overall, the Special Issue provides a good mix of covering current areas of interest while still exploring new directions.

Dr. Vasily Kozhevnikov
Dr. Dmitry Sorokin
Dr. Vladimir Denisov
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Energies is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • vacuum electronics
  • vacuum breakdown
  • vacuum discharges
  • travelling wave tubes
  • electron beams
  • ion beams
  • plasma diagnostics
  • plasma spectroscopy
  • invasive probe methods
  • low-temperature plasmas
  • fusion plasma
  • numerical simulation

Published Papers (3 papers)

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Research

25 pages, 10406 KiB  
Article
Interaction of Electron Beams and Polarized Radiation in a Two-Beam Free-Electron Laser
by Soon-Kwon Nam and Yunseong Park
Energies 2022, 15(10), 3703; https://0-doi-org.brum.beds.ac.uk/10.3390/en15103703 - 18 May 2022
Cited by 1 | Viewed by 1188
Abstract
Recent research has focused on shorter pulses, new spectral ranges, higher photon fluxes, and the production of photons with a variety of polarizations. A time-dependent three-dimensional free-electron laser oscillator code was developed for a two-beam free-electron laser system with an elliptically polarized undulator. [...] Read more.
Recent research has focused on shorter pulses, new spectral ranges, higher photon fluxes, and the production of photons with a variety of polarizations. A time-dependent three-dimensional free-electron laser oscillator code was developed for a two-beam free-electron laser system with an elliptically polarized undulator. Characteristics of the interaction of the electron beams and polarized radiation in the XUV region were studied using this code. The code utilized an optical field using the spectral method in the paraxial approximation by a fast Fourier transformation, a Gaussian modal expansion for the optical field, and Newton–Lorentz force equations for particle tracking. As the emittance was increased, the degrees of polarization of the single-beam system with an elliptically polarized undulator and the two-beam system with a planar undulator were decreased significantly compared to those of a two-beam system with an elliptically polarized undulator in the XUV regions. The radiation intensities, the evolutions of the radiation power for wavelength, and the time in the two-beam system were increased significantly compared to those of a single-beam system. The statistical simulation result for the distribution of the number of shots in the degrees of polarization in the two-beam system was much better than that of the case with the single-beam system. Full article
(This article belongs to the Special Issue Vacuum Electronics and Plasma Diagnostics)
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9 pages, 2927 KiB  
Article
High-Voltage Nanosecond Discharge as a Means of Fast Energy Switching
by Dmitry Beloplotov, Dmitry Sorokin and Victor Tarasenko
Energies 2021, 14(24), 8449; https://0-doi-org.brum.beds.ac.uk/10.3390/en14248449 - 14 Dec 2021
Cited by 1 | Viewed by 1850
Abstract
The formation of a nanosecond discharge with the use of a Hamamatsu streak-camera and with simultaneously wideband (10 GHz) measurement of voltage and displacement current caused by a streamer in one pulse has been studied. Nanosecond voltage pulses of various amplitudes (16, 20, [...] Read more.
The formation of a nanosecond discharge with the use of a Hamamatsu streak-camera and with simultaneously wideband (10 GHz) measurement of voltage and displacement current caused by a streamer in one pulse has been studied. Nanosecond voltage pulses of various amplitudes (16, 20, and 27 kV) were applied across a point-to-plane gap (8.5 mm) filled with air at various pressures (13, 25, 50, 100, and 200 kPa). It was found that the voltage across the gap drops as soon as a streamer appears in the vicinity of the pointed electrode. At the same time, a pre-breakdown current begins to flow. The magnitude of the pre-breakdown current, as well as the voltage drop, is determined by the rate of formation of dense plasma and, accordingly, by the rate of redistribution of the electric field in the gap. The streamer velocity determines the rise time and amplitude of the current. The higher the streamer velocity, the shorter the rise time and the higher the amplitude of the pre-breakdown current. The propagation of a backward and third ionization waves was observed both with the streak camera and by measuring the displacement current. As they propagate, the discharge current increases to its amplitude value. Full article
(This article belongs to the Special Issue Vacuum Electronics and Plasma Diagnostics)
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13 pages, 5598 KiB  
Article
The Electrodynamic Mechanism of Collisionless Multicomponent Plasma Expansion in Vacuum Discharges: From Estimates to Kinetic Theory
by Vasily Kozhevnikov, Andrey Kozyrev, Aleksandr Kokovin and Natalia Semeniuk
Energies 2021, 14(22), 7608; https://0-doi-org.brum.beds.ac.uk/10.3390/en14227608 - 14 Nov 2021
Cited by 3 | Viewed by 1241
Abstract
This paper is devoted to the study of collisionless multicomponent plasma expansion in vacuum discharges. Based on the fundamental principles of physical kinetics formulated for vacuum discharge plasma, an answer is given to the following question: What is the main mechanism of cathode [...] Read more.
This paper is devoted to the study of collisionless multicomponent plasma expansion in vacuum discharges. Based on the fundamental principles of physical kinetics formulated for vacuum discharge plasma, an answer is given to the following question: What is the main mechanism of cathode plasma transport from cathode to anode, which ensures non-thermal metallic positive ion movement? Theoretical modeling is provided based on the Vlasov–Poisson system of equations for a current flow in a planar vacuum discharge gap. It was shown that the non-thermal plasma expansion is of a purely electrodynamic nature, caused by the formation of a “potential hump” in the interelectrode space and its subsequent movement under certain conditions consistent with plasma electrodynamic transportation. The presented results reveal two cases of the described phenomenon: (1) the dynamics of single-component cathode plasma and (2) multicomponent plasma (consisting of multiple charged ions) expansion. Full article
(This article belongs to the Special Issue Vacuum Electronics and Plasma Diagnostics)
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