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Plasma dynamics at the Schwinger limit and beyond
Umeå University, Faculty of Science and Technology, Department of Physics.ORCID iD: 0000-0003-2716-098x
Umeå University, Faculty of Science and Technology, Department of Physics.ORCID iD: 0000-0002-1555-7616
Umeå University, Faculty of Science and Technology, Department of Physics.ORCID iD: 0000-0003-3904-4193
Umeå University, Faculty of Science and Technology, Department of Physics.
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2023 (English)In: Physical review. E, ISSN 2470-0045, E-ISSN 2470-0053, Vol. 107, no 3, article id 035204Article in journal (Refereed) Published
Abstract [en]

Strong field physics close to or above the Schwinger limit are typically studied with vacuum as initial condition or by considering test particle dynamics. However, with a plasma present initially, quantum relativistic mechanisms such as Schwinger pair creation are complemented by classical plasma nonlinearities. In this work we use the Dirac-Heisenberg-Wigner formalism to study the interplay between classical and quantum mechanical mechanisms in the regime of ultrastrong electric fields. In particular, the effects of initial density and temperature on the plasma oscillation dynamics are determined. Finally, comparisons with competing mechanisms such as radiation reaction and Breit-Wheeler pair production are made.

Place, publisher, year, edition, pages
American Physical Society, 2023. Vol. 107, no 3, article id 035204
National Category
Fusion, Plasma and Space Physics
Research subject
Physics
Identifiers
URN: urn:nbn:se:umu:diva-205903DOI: 10.1103/physreve.107.035204ISI: 000957776100003PubMedID: 37073070Scopus ID: 2-s2.0-85151329265OAI: oai:DiVA.org:umu-205903DiVA, id: diva2:1745162
Funder
Swedish Research Council, 2020-04327Available from: 2023-03-22 Created: 2023-03-22 Last updated: 2023-05-08Bibliographically approved
In thesis
1. Modelling and analyzing strong-field effects in quantum plasma
Open this publication in new window or tab >>Modelling and analyzing strong-field effects in quantum plasma
2023 (English)Doctoral thesis, comprehensive summary (Other academic)
Alternative title[sv]
Modellering och analys av effekter från starka fält i kvantkinetiska plasmor
Abstract [en]

Under the extreme conditions that can be found around dense stars and in the accretion discs of black holes, several strong-field quantum phenomena dominate the dynamics of the plasma. This includes the creation of matter and anti-matter from the vacuum (Schwinger mechanism), radiation reaction and Landau quantization. Some of these strong field phenomena were presented theoretically a century ago but have never been verified in experiments due to the difficulty of creating the required extreme conditions in the lab. However, with the development of laser facilities in the past decades, it will be possible to observe several extreme physical phenomena in the near future. To conduct experiments on these extreme phenomena, theoretical simulations need to be constructed as a guide for optimizing experiments.

This thesis is concerned with developing and analyzing strong field phenomena in kinetic plasma models. The focus is to extend current kinetic models to include several physical phenomena that are relevant to future experiments on laser-plasma interaction. In particular, a kinetic theory based on the Wigner transformation of the Dirac equation has been analyzed in different regimes. This kinetic model is used to study the plasma dynamics at the Schwinger limit, where collective plasma effects and several quantum processes are studied.

Place, publisher, year, edition, pages
Umeå: Umeå University, 2023. p. 69
Keywords
Plasma physics, Strong-field physics, Kinetic theory, Quantum plasma
National Category
Fusion, Plasma and Space Physics
Research subject
Physics
Identifiers
urn:nbn:se:umu:diva-208019 (URN)978-91-8070-067-2 (ISBN)978-91-8070-068-9 (ISBN)
Public defence
2023-06-01, NAT.D.450, Förvaltningshuset Hus D, 901 87, Umeå, 13:00 (English)
Opponent
Supervisors
Funder
Swedish Research Council, 2016-03806
Available from: 2023-05-11 Created: 2023-05-08 Last updated: 2023-05-10Bibliographically approved

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Brodin, GertAl-Naseri, HaidarZamanian, JensTorgrimsson, Greger

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