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Transition from wakefield generation to soliton formation
Umeå University, Faculty of Science and Technology, Department of Physics.
2018 (English)In: Physical review. E, ISSN 2470-0045, E-ISSN 2470-0053, Vol. 97, no 4, article id 043204Article in journal (Refereed) Published
Abstract [en]

It is well known that when a short laser pulse propagates in an underdense plasma, it induces longitudinal plasma oscillations at the plasma frequency after the pulse, typically referred to as the wakefield. However, for plasma densities approaching the critical density, wakefield generation is suppressed, and instead the EM-pulse (electromagnetic pulse) undergoes nonlinear self-modulation. In this article we have studied the transition from the wakefield generation to formation of quasi-solitons as the plasma density is increased. For this purpose we have applied a one-dimensional relativistic cold fluid model, which has also been compared with particle-in-cell simulations. A key result is that the energy loss of the EM-pulse due to wakefield generation has its maximum for a plasma density of the order 10% of the critical density, but that wakefield generation is sharply suppressed when the density is increased further.

Place, publisher, year, edition, pages
2018. Vol. 97, no 4, article id 043204
National Category
Fusion, Plasma and Space Physics
Identifiers
URN: urn:nbn:se:umu:diva-147458DOI: 10.1103/PhysRevE.97.043204ISI: 000430062100007OAI: oai:DiVA.org:umu-147458DiVA, id: diva2:1210830
Funder
Swedish Research Council, 2016-03806Available from: 2018-05-29 Created: 2018-05-29 Last updated: 2018-06-09Bibliographically approved

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Brodin, Gert

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