{"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":null,"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":1.1000,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Plasma Physics Reports","FirstCategoryId":"101","ListUrlMain":"https://link.springer.com/article/10.1134/S1063780X25602810","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"PHYSICS, FLUIDS & PLASMAS","Score":null,"Total":0}
引用次数: 0
Abstract
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 × 1021 W/cm2 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/cm3 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 µm3 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/cm3 (pressure of ≥100 Gbar), can be formed under the same parameters of the experiment.
期刊介绍:
Plasma Physics Reports is a peer reviewed journal devoted to plasma physics. The journal covers the following topics: high-temperature plasma physics related to the problem of controlled nuclear fusion based on magnetic and inertial confinement; physics of cosmic plasma, including magnetosphere plasma, sun and stellar plasma, etc.; gas discharge plasma and plasma generated by laser and particle beams. The journal also publishes papers on such related topics as plasma electronics, generation of radiation in plasma, and plasma diagnostics. As well as other original communications, the journal publishes topical reviews and conference proceedings.