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Radiation reaction effects in relativistic plasmas: the electrostatic limit
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för fysik.ORCID-id: 0000-0002-1555-7616
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för fysik.ORCID-id: 0000-0003-2716-098x
2023 (engelsk)Inngår i: Physical review. E, ISSN 2470-0045, E-ISSN 2470-0053, Vol. 107, nr 3, artikkel-id 035203Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

We study the evolution of electrostatic plasma waves, using the relativistic Vlasov equation extended by the Landau-Lifshitz radiation reaction, accounting for the back-reaction due to the emission of single particle Larmor radiation. In particular, the Langmuir wave damping is calculated as a function of wave number, initial temperature, and initial electric field amplitude. Moreover, the background distribution function loses energy in the process, and we calculate the cooling rate as a function of initial temperature and initial wave amplitude. Finally, we investigate how the relative magnitude of wave damping and background cooling varies with the initial parameters. In particular, it is found that the relative contribution to the energy loss associated with background cooling decreases slowly with the initial wave amplitude.

sted, utgiver, år, opplag, sider
American Physical Society, 2023. Vol. 107, nr 3, artikkel-id 035203
HSV kategori
Forskningsprogram
fysik
Identifikatorer
URN: urn:nbn:se:umu:diva-205904DOI: 10.1103/physreve.107.035203ISI: 000954805400003PubMedID: 37072971Scopus ID: 2-s2.0-85151338611OAI: oai:DiVA.org:umu-205904DiVA, id: diva2:1745174
Tilgjengelig fra: 2023-03-22 Laget: 2023-03-22 Sist oppdatert: 2023-05-08bibliografisk kontrollert
Inngår i avhandling
1. Modelling and analyzing strong-field effects in quantum plasma
Åpne denne publikasjonen i ny fane eller vindu >>Modelling and analyzing strong-field effects in quantum plasma
2023 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
Alternativ tittel[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.

sted, utgiver, år, opplag, sider
Umeå: Umeå University, 2023. s. 69
Emneord
Plasma physics, Strong-field physics, Kinetic theory, Quantum plasma
HSV kategori
Forskningsprogram
fysik
Identifikatorer
urn:nbn:se:umu:diva-208019 (URN)978-91-8070-067-2 (ISBN)978-91-8070-068-9 (ISBN)
Disputas
2023-06-01, NAT.D.450, Förvaltningshuset Hus D, 901 87, Umeå, 13:00 (engelsk)
Opponent
Veileder
Forskningsfinansiär
Swedish Research Council, 2016-03806
Tilgjengelig fra: 2023-05-11 Laget: 2023-05-08 Sist oppdatert: 2023-05-10bibliografisk kontrollert

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Al-Naseri, HaidarBrodin, Gert

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