Extreme plasma states in laser-governed vacuum breakdown
| Autor: | Iosif B. Meyerov, Arkady Gonoskov, Alexander M. Sergeev, Aleksei V. Bashinov, Arkady Kim, Evgeny Efimenko, Sergei I. Bastrakov, A. Muraviev |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Opacity
FOS: Physical sciences lcsh:Medicine 01 natural sciences Article 010305 fluids & plasmas law.invention law Physics::Plasma Physics 0103 physical sciences 010306 general physics lcsh:Science Focal volume Physics Multidisciplinary lcsh:R Plasma Laser Physics - Plasma Physics Computational physics Plasma Physics (physics.plasm-ph) Nonlinear system Pair production lcsh:Q Order of magnitude Beam (structure) |
| Zdroj: | Scientific Reports, Vol 8, Iss 1, Pp 1-11 (2018) Scientific Reports |
| ISSN: | 2045-2322 |
| Popis: | Triggering vacuum breakdown at laser facility is expected to provide rapid electron-positron pair production for studies in laboratory astrophysics and fundamental physics. However, the density of the produced plasma may cease to increase at a relativistic critical density, when the plasma becomes opaque. Here, we identify the opportunity of breaking this limit using optimal beam configuration of petawatt-class lasers. Tightly focused laser fields allow generating plasma in a small focal volume much less than λ3 and creating extreme plasma states in terms of density and produced currents. These states can be regarded to be a new object of nonlinear plasma physics. Using 3D QED-PIC simulations we demonstrate a possibility of reaching densities over 1025 cm−3, which is an order of magnitude higher than expected earlier. Controlling the process via initial target parameters provides an opportunity to reach the discovered plasma states at the upcoming laser facilities. |
| Databáze: | OpenAIRE |
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