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Symmetry
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Recent Advances in Plasma Physics
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Recent Advances in Plasma Physics

A special issue of Symmetry (ISSN 2073-8994). This special issue belongs to the section "Physics".

Deadline for manuscript submissions: closed (31 December 2022) | Viewed by 5880

Special Issue Editor

Dr. Alessandro Curcio

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Guest Editor
Centro de Laseres Pulsados (CLPU), Edificio M5. Parque Científico. C/ Adaja, 8. 37185 Villamayor, Salamanca, Spain

Special Issue Information

Dear Colleagues,

The field of plasma physics has undergone renewed scientific interest due to the special host environment that plasmas offer to charged particles and electromagnetic fields. In fact, plasmas represent the fourth state of matter, where the atomic structure is broken down. This circumstance paves a unique way towards high-field applications and non-linear dynamics. As fluids with important electromagnetic susceptibility, plasmas respond and evolve non-linearly with respect to external forces so that particles and waves can mix, generating secondary sources of fields. As the most brilliant examples, cold plasmas are considered the proper physical environment for particle transport and acceleration, while hot plasmas are best for nuclear fusion. Relativistic plasmas can generally be exploited for non-linear optics studies and applications. Anisotropic systems and other relevant symmetries in physics can be explored within magnetized plasmas. Therefore, the interaction of plasmas with particles and fields, in particular at high intensity, is indeed very promising for scientific and technological advances.

Dr. Alessandro Curcio
Guest Editor

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. Symmetry is an international peer-reviewed open access monthly 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 2400 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

  • plasma physics
  • high-intensity physics
  • non-linear dynamics
  • secondary sources
  • anisotropy

Published Papers (3 papers)

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Research

10 pages, 1569 KiB  
Article
Advanced Stabilization Methods of Plasma Devices for Plasma-Based Acceleration
by Mario Galletti, Maria Pia Anania, Sahar Arjmand, Angelo Biagioni, Gemma Costa, Martina Del Giorno, Massimo Ferrario, Valerio Lollo, Riccardo Pompili, Yoav Raz, Vladimir Shpakov, Fabio Villa, Arie Zigler and Alessandro Cianchi
Symmetry 2022, 14(3), 450; https://doi.org/10.3390/sym14030450 - 24 Feb 2022
Cited by 5 | Viewed by 1748
Abstract
Towards the next generation of compact plasma-based accelerators, useful in several fields, such as basic research, medicine and industrial applications, a great effort is required to control the plasma creation, the necessity of producing a time-jitter free channel, and its stability namely uniformity [...] Read more.
Towards the next generation of compact plasma-based accelerators, useful in several fields, such as basic research, medicine and industrial applications, a great effort is required to control the plasma creation, the necessity of producing a time-jitter free channel, and its stability namely uniformity and reproducibility. In this Letter, we describe an experimental campaign adopting a gas-filled discharge-capillary where the plasma and its generation are stabilized by triggering its ignition with an external laser pulse or an innovative technique based on the primary dark current (DC) in the accelerating structure of a linear accelerator (LINAC). The results show an efficient stabilization of the discharge pulse and plasma density with both pre-ionizing methods turning the plasma device into a symmetrical stable accelerating environment, especially when the external voltage is lowered near the breakdown value of the gas. The development of tens of centimeter long capillaries is enabled and, in turn, longer acceleration lengths can be adopted in a wide range of plasma-based acceleration experiments. Full article
(This article belongs to the Special Issue Recent Advances in Plasma Physics)
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12 pages, 3645 KiB  
Article
Twisted Waves near a Plasma Cutoff
by José Tito Mendonça, Camilla Willim and Jorge Vieira
Symmetry 2022, 14(1), 146; https://doi.org/10.3390/sym14010146 - 12 Jan 2022
Cited by 1 | Viewed by 1464
Abstract
This work considers twisted wave propagation in inhomogeneous and unmagnetised plasma, and discusses the wave properties in the cutoff region. The qualitative differences between twisted waves described by a single Laguerre–Gauss (LG) mode, and light springs resulting from the superposition of two or [...] Read more.
This work considers twisted wave propagation in inhomogeneous and unmagnetised plasma, and discusses the wave properties in the cutoff region. The qualitative differences between twisted waves described by a single Laguerre–Gauss (LG) mode, and light springs resulting from the superposition of two or more LG modes with different frequency and helicity are studied. The peculiar properties displayed by these waves in the nonuniform plasma are discussed. The pulse envelope of a light-spring shows a contraction at reflection, which resembles that of a compressed mechanical spring. The case of normal incidence is examined, and nonlinear ponderomotive effects are discussed, using theory and simulations. Full article
(This article belongs to the Special Issue Recent Advances in Plasma Physics)
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6 pages, 354 KiB  
Article
Closed-Form Solution of Adiabatic Particle Trajectories in Axis-Symmetric Magnetic Fields
by Fabio Sattin and Dominique Franck Escande
Symmetry 2021, 13(10), 1784; https://doi.org/10.3390/sym13101784 - 25 Sep 2021
Viewed by 1549
Abstract
The dynamics of a low-energy charged particle in an axis-symmetric magnetic field is known to be a regular superposition of periodic—although possibly incommensurate—motions. The projection of the particle orbit along the two non-ignorable coordinates (x,y) may be expressed in [...] Read more.
The dynamics of a low-energy charged particle in an axis-symmetric magnetic field is known to be a regular superposition of periodic—although possibly incommensurate—motions. The projection of the particle orbit along the two non-ignorable coordinates (x,y) may be expressed in terms of each other: y=y(x), yet—to our knowledge—such a functional relation has never been directly produced in literature, but only by way of a detour: first, equations of motion are solved, yielding x=x(t),y=y(t), and then one of the two relations is inverted, x(t)→t(x). In this paper, we present a closed-form functional relation which allows us to express coordinates of the particle’s orbit without the need to pass through the hourly law of motion. Full article
(This article belongs to the Special Issue Recent Advances in Plasma Physics)
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