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Structure of a collisionless pair jet in a magnetizedelectron-proton plasma: Flow-aligned magnetic field
Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering. (Scientific Visualization)ORCID iD: 0000-0003-4055-0552
Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering. (Scientific Visualization)ORCID iD: 0000-0003-1511-5006
Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering. (Scientific Visualization)
CRAL, École Normale Supérieure, 69622 Lyon, France.
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2019 (English)In: High Energy Phenomena in Relativistic Outflows VII (HEPRO VII): Formation and propagation of relativistic outflows, Sissa Medialab srl, 2019, article id 006Conference paper, Published paper (Refereed)
Abstract [en]

We present the results from a particle-in-cell (PIC) simulation that models the interaction between a spatially localized electron-positron cloud and an electron-ion plasma. The latter is permeated by a magnetic field that is initially spatially uniform and aligned with the mean velocity vector of the pair cloud. The pair cloud expels the magnetic field and piles it up into an electromagnetic piston. Its electromagnetic field is strong enough to separate the pair cloud from the ambient plasma in the direction that is perpendicular to the cloud propagation direction. The piston propagates away from the spine of the injected pair cloud and it accelerates the protons to a high nonrelativistic speed. The accelerated protons form an outer cocoon that will eventually become separated from the unperturbed ambient plasma by a fast magnetosonic shock. No electromagnetic piston forms at the front of the cloud and a shock is mediated here by the filamentation instability. The final plasma distribution resembles that of a hydrodynamic jet. Collisionless plasma jets may form in the coronal plasma of accreting black holes and the interaction between the strong magnetic field of the piston and the hot pair cloud may contribute to radio emissions by such objects.

Place, publisher, year, edition, pages
Sissa Medialab srl, 2019. article id 006
Keywords [en]
PIC simulation, collisionless plasma, relativistic jet
National Category
Fusion, Plasma and Space Physics
Identifiers
URN: urn:nbn:se:liu:diva-164075DOI: 10.22323/1.354.0006OAI: oai:DiVA.org:liu-164075DiVA, id: diva2:1411598
Conference
High Energy Phenomena in Relativistic Outflows VII (HEPRO VII)
Available from: 2020-03-04 Created: 2020-03-04 Last updated: 2020-03-11

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Dieckmann, Mark EFalk, MartinSteneteg, PeterHotz, IngridNordman, AidaDell'Acqua, PierangeloYnnerman, Anders

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Dieckmann, Mark EFalk, MartinSteneteg, PeterHotz, IngridNordman, AidaDell'Acqua, PierangeloYnnerman, Anders
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Media and Information TechnologyFaculty of Science & EngineeringCenter for Medical Image Science and Visualization (CMIV)
Fusion, Plasma and Space Physics

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