{"title":"Microwave Discharge Supported by Gyrotron Radiation on a Dielectric Substrate with Silver Particles in Air to Create a Metallized Coating on ABS Plastic","authors":"Z. A. Zakletskii, D. V. Malakhov, S. E Andreev","doi":"10.1134/S1063780X25602639","DOIUrl":"10.1134/S1063780X25602639","url":null,"abstract":"<p>The results of experiments on the use of microwave discharge plasma supported by microwave radiation of a pulsed (6 ms) gyrotron for the transfer of matter from a metallic silver nanopowder to the surface of a dielectric ABS (acrylonitrile butadiene styrene) plastic target are presented. The experiments are carried out at atmospheric and reduced pressure (up to 50 Torr) of air at a microwave radiation power density from 1.25 to 12 kW/cm<sup>2</sup>. The spatial structures of microwave discharge plasma propagating near a quartz substrate with a silver nanopowder layer are studied. It is determined that the discharge can have at least three types of the spatial structure: (a) localized microwave discharge at the points of the discharge initiation; (b) microwave discharge propagating through the quartz substrate; (c) microwave discharge propagating along the quartz substrate. The metal layer deposited on the plastic surface is characterized using electron microscopy.</p>","PeriodicalId":735,"journal":{"name":"Plasma Physics Reports","volume":"51 5","pages":"615 - 625"},"PeriodicalIF":1.1,"publicationDate":"2025-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144934518","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
S. I. Popel, Yu. S. Reznichenko, S. I. Kopnin, Yu. N. Izvekova, A. Yu. Dubinskii, L. M. Zelenyi
{"title":"Dusty Plasma in the Solar System: Atmospheres of Planets","authors":"S. I. Popel, Yu. S. Reznichenko, S. I. Kopnin, Yu. N. Izvekova, A. Yu. Dubinskii, L. M. Zelenyi","doi":"10.1134/S1063780X25602780","DOIUrl":"10.1134/S1063780X25602780","url":null,"abstract":"<p>A review of theoretical studies of dusty plasma in the atmospheres of planets of the solar system carried out at the Space Research Institute of the Russian Academy of Sciences is given. Special attention is paid to physical processes related to noctilucent clouds, polar mesospher<s>e</s> summer echoes, dust-acoustic perturbations in the Earth’s atmosphere, clouds in the ionosphere of Mars, and Schumann resonances (SR). It is noted that intense studies of the plasma-dust processes in the atmospheres of planets can currently be carried out for the Earth and Mars. Studying the corresponding process in the atmospheres of other planets of the solar system requires additional knowledge on the objects that can be gained only in the course of future space missions.</p>","PeriodicalId":735,"journal":{"name":"Plasma Physics Reports","volume":"51 5","pages":"562 - 575"},"PeriodicalIF":1.1,"publicationDate":"2025-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144934574","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sh. Wang, J. Zhou, H. Yu, N. Li, K. Guo, T. Wang, M. Cheng, S. Zhang, Zh. Li, K. Wang
{"title":"Fully Vaporization of the Electrically Exploding Platinum Wires in Vacuum","authors":"Sh. Wang, J. Zhou, H. Yu, N. Li, K. Guo, T. Wang, M. Cheng, S. Zhang, Zh. Li, K. Wang","doi":"10.1134/S1063780X24601822","DOIUrl":"10.1134/S1063780X24601822","url":null,"abstract":"<p>Experimental results characterizing the dynamics of the electrically exploding platinum wires without and with insulating coatings are presented. The insulating coatings substantially enhance the energy deposition with the overheating coefficients increasing from 0.5 for exploding bare platinum wires to 1.3 for exploding coated platinum wires with 2 cm in length. Although the homogeneous vaporized platinum wires can be realized in the exploding coated platinum wires, the exploding products exhibits a strong stochastic behavior. Most of the electrically exploding platinum wires produce inhomogeneous structures in energy deposition. Shortening the wire length further increases the specific energy deposition. The total deposited energy is high enough to vaporize the entire wire, while only a part of the wire is transformed into gaseous state. The percentage of vaporization increases almost linearly with the axial electrical field. With decrease of the wire length from 2 to 0.5 cm, the specific energy deposition increases from 2.6 to 14.9 eV/atom, and the percentage of vaporization improves from 52 to 92%.</p>","PeriodicalId":735,"journal":{"name":"Plasma Physics Reports","volume":"51 4","pages":"496 - 503"},"PeriodicalIF":1.1,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145170609","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Generation of Synchrotron Radiation During the Interaction between a Multiterrawatt Laser Pulse and a Transparent Plasma","authors":"O. E. Vais, M. G. Lobok, V. Yu. Bychenkov","doi":"10.1134/S1063780X25602597","DOIUrl":"10.1134/S1063780X25602597","url":null,"abstract":"<p>The relativistic self-trapping of a laser pulse with relativistic intensity during its propagation in a high-density transparent plasma is accompanied by the generation of ultrabright synchrotron (betatron) radiation in the ultrahard X-ray range. This work presents a study of the effect of the duration of the laser pulse with a given energy on the characteristics of this radiation. It is shown that the currently available compression of powerful laser pulses substantially increases the efficiency of conversion into synchrotron radiation and also increases the brightness of the X-ray source by one order of magnitude.</p>","PeriodicalId":735,"journal":{"name":"Plasma Physics Reports","volume":"51 4","pages":"439 - 450"},"PeriodicalIF":1.1,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S1063780X25602597.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145171713","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. I. Smolyakov, A. Sabo, S. I. Krasheninnikov, P. N. Yushmanov
{"title":"Electromagnetic and Centrifugal Effects on Plasma Acceleration in the Magnetic Nozzle","authors":"A. I. Smolyakov, A. Sabo, S. I. Krasheninnikov, P. N. Yushmanov","doi":"10.1134/S1063780X25602214","DOIUrl":"10.1134/S1063780X25602214","url":null,"abstract":"<p>Plasma flow and acceleration in the converging-diverging magnetic field configuration, such as magnetic nozzle in electric propulsion and open magnetic mirrors for fusion applications are considered. This work analyses plasma acceleration in the magnetic nozzle with an emphasis on the electromagnetic effects and centrifugal forces due to plasma rotation. Intrinsic coupling of the azimuthal rotation and azimuthal magnetic field is analyzed, and additional plasma acceleration due to the conversion of the energy of the azimuthal magnetic field and azimuthal rotation is demonstrated. For large expansion in the diverging magnetic field plasma flow velocities may approach and exceed the Alfvén velocity. In these regimes, stationary solutions for the transonic and trans-Alfvénic flows have been obtained that demonstrate the existence of the unique regular solution passing through all critical points within the MHD theory, i.e., the points where the plasma flow is equal to the signal velocities of the MHD modes: slow and fast magnetohydrodynamic waves and Alfvén wave. The time-dependent initial value simulations show that stationary equilibrium flows are robust and stable, so that time-dependent solutions converge toward stationary solutions.</p>","PeriodicalId":735,"journal":{"name":"Plasma Physics Reports","volume":"51 4","pages":"427 - 438"},"PeriodicalIF":1.1,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145170611","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
E. M. Urvachev, T. V. Losseva, E. S. Goncharov, A. N. Lyakhov
{"title":"Numerical Simulation of Expansion of Artificial Plasma Formations in the Geomagnetic Field","authors":"E. M. Urvachev, T. V. Losseva, E. S. Goncharov, A. N. Lyakhov","doi":"10.1134/S1063780X25602743","DOIUrl":"10.1134/S1063780X25602743","url":null,"abstract":"<p>A three-dimensional numerical simulation of the interaction between a high-velocity aluminum plasma jet and the geomagnetic field has been performed, based on the injection scenario derived from the North Star II experiment. The simulation results demonstrate the excitation of Alfvén waves, expulsion of the magnetic field, dynamics of the diamagnetic cavity, deceleration of the jet, and induced motion in the background plasma. The calculated parameters show agreement with experimentally measured ion densities.</p>","PeriodicalId":735,"journal":{"name":"Plasma Physics Reports","volume":"51 4","pages":"464 - 473"},"PeriodicalIF":1.1,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145171625","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Numerical Study for Prediction of Neon Soft X-Ray Yield Emitted from the Plasma Focus Devices Using the Lee Model Code for Different Anode Shapes","authors":"R. Albahri, Y. Abou-Ali, M. Akel","doi":"10.1134/S1063780X2460169X","DOIUrl":"10.1134/S1063780X2460169X","url":null,"abstract":"<p>Numerical experiments were performed using the Lee model code to study the soft X-ray characteristics versus pressure at different operating voltages of the NX2 plasma focus device for two types of anodes (cylindrical and tapered). It was observed that the computed yield increased by 5 times when switching from the cylindrical anode to the tapered one, which agreed with the experimental results. Later, numerical experiments were conducted to study the effect of the different tapering conditions (anode radius at the end of the taper and axial distance at the start of the taper) on the soft X-ray yield, interesting results were reached. We found that the yield is not related to the axial distance for the taper start, but is largely related to the end anode radius of the taper, as there is an optimum end anode radius of the taper that gives the highest yield for soft X-ray. The convergence in previous computed and measured results was taken advantage to conduct numerical experiments on the PF-24 device to find the soft X-ray characteristics and the maximum soft X-ray yield corresponding to the optimum pressure for different anode shapes (cylindrical and tapered). In addition, numerical experiments were conducted to find the optimum conditions of geometric dimensions of the cylindrical anode (anode radius, anode length), and tapering conditions (anode radius at the end of the taper and axial distance at the start of the taper) which give the maximum soft X-ray yield for PF-24 device. The results obtained for the PF-24 device behave identically to the behavior of the results obtained for the NX2 device.</p>","PeriodicalId":735,"journal":{"name":"Plasma Physics Reports","volume":"51 4","pages":"484 - 495"},"PeriodicalIF":1.1,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145171626","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Evolution of High Energy Density in Plasma Formed upon Irradiation of Steel Foils by Ultrarelativistic Femtosecond Laser Pulses","authors":"M. V. Sedov, M. A. Alkhimova, S. S. Makarov","doi":"10.1134/S1063780X25602810","DOIUrl":"10.1134/S1063780X25602810","url":null,"abstract":"<p>Results of the particle-in-cell simulation that illustrate evolution of parameters of laser-produced plasma formed upon irradiation of steel foils with a thickness of 1–5 µm by femtosecond laser pulses with intensity of ≥5 × 10<sup>21</sup> W/cm<sup>2</sup> are presented. Analytical estimates for analysis of energy dissipation in a foil of finite thickness are obtained. Numerical simulations are compared with the results of the recent experiment in which diagnostics of plasma parameters was carried out by methods of X-ray spectroscopy. The results of simulation agree with the experimental results and confirm that a microscopic-sized plasma source with energy density exceeding 1 GJ/cm<sup>3</sup> and lifetime of about 500 fs can be formed as a result of action of high-contrast femtosecond laser pulses of ultrarelativistic intensity. In addition, simulations demonstrate that a plasma source with a volume of ~1 µm<sup>3</sup> and lifetime of ~5 light periods that has parameters close to those existing inside the Sun, i.e., the temperature of ~1–3 keV and energy density of ≥10 GJ/cm<sup>3</sup> (pressure of ≥100 Gbar), can be formed under the same parameters of the experiment.</p>","PeriodicalId":735,"journal":{"name":"Plasma Physics Reports","volume":"51 4","pages":"451 - 457"},"PeriodicalIF":1.1,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145171714","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. D. Izarova, A. M. Belov, L. G. Eliseev, A. V. Sushkov, A. Yu. Balashov, A. V. Stepin, K. A. Rogozin, G. A. Sarancha
{"title":"Methods for Processing Signals of Magnetic Probes at the T-15MD Tokamak","authors":"A. D. Izarova, A. M. Belov, L. G. Eliseev, A. V. Sushkov, A. Yu. Balashov, A. V. Stepin, K. A. Rogozin, G. A. Sarancha","doi":"10.1134/S1063780X25602317","DOIUrl":"10.1134/S1063780X25602317","url":null,"abstract":"<p>The applicability of several methods for processing experimental signals of local magnetic probes is analyzed for the purpose of determining the poloidal mode number <i>m</i> of MHD perturbations in plasma of tokamak with noncircular cross-section. These methods are the two-dimensional Fourier transform, the -Hilbert transform method, the method of singular value decomposition, and the method of phase matrices. The methods listed were applied under conditions of the D-shaped cross-section of the T-15MD tokamak vacuum vessel. They showed good results in determining the poloidal wave numbers of MHD perturbations for both synthetic and experimental signals of local magnetic probes. The results of processing the experimental data from local magnetic probes were in good agreement with the data of soft X-ray diagnostics of the T‑15MD tokamak.</p>","PeriodicalId":735,"journal":{"name":"Plasma Physics Reports","volume":"51 4","pages":"397 - 413"},"PeriodicalIF":1.1,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145170728","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Nonlinear Dust Acoustic Waves near the Surface of Phobos and Deimos","authors":"Yu. N. Izvekova, S. I. Kopnin, S. I. Popel","doi":"10.1134/S1063780X25602767","DOIUrl":"10.1134/S1063780X25602767","url":null,"abstract":"<p>Phobos and Deimos are atmosphereless celestial bodies with a weak gravity. Their surfaces consist of small regolith grains that are not connected to one another and have appeared due to bombardment with micrometeorites. Their weak gravity makes these bodies interesting for piloted flights and increases the role of dust, since even a small perturbation leads to the creation of massive dust clouds above their surfaces. The surfaces of these satellites of Mars are charged by the electromagnetic radiation from the Sun and the plasma of the solar wind. The dust grains located at the surface and in the near-surface layer absorb the photons, photoelectrons, electrons, and ions of the solar wind, and, as a result, they obtain electric charge. The action of the electrostatic force under the weak gravity conditions leads to the detachment of dust grains from the surface and the creation of a dusty plasma system together with the electrons and ions. In the dusty plasma system above the surfaces of Mars’s satellites, dust acoustic waves can propagate. In this work, we consider nonlinear periodic and solitary dust acoustic waves with an arbitrary amplitude, which can propagate near the surface of Phobos and Deimos, and discuss the possibility of observing these structures.</p>","PeriodicalId":735,"journal":{"name":"Plasma Physics Reports","volume":"51 4","pages":"458 - 463"},"PeriodicalIF":1.1,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145171715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}