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Rippled quasiperpendicularshock observed by the Magnetospheric Multiscale spacecraft
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy. Uppsala University, Disciplinary Domain of Science and Technology, Physics, Swedish Institute of Space Physics, Uppsala Division.ORCID iD: 0000-0001-7714-1870
Imperial Coll London, Blackett Lab, London SW7 2AZ, England; Univ Colorado, Lab Atmospher & Space Phys, Boulder, CO 80303 USA.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Swedish Institute of Space Physics, Uppsala Division.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Swedish Institute of Space Physics, Uppsala Division.
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2016 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114Article in journal (Refereed) Accepted
Abstract [en]

Collisionless shock non-stationarity arising from micro-scale physics influences shock structure and particle acceleration mechanisms. Non-stationarity has been difficult to quantify due to the small spatial and temporal scales. We use the closely-spaced (sub-gyroscale), high time-resolution measurements from one rapid crossing of Earth's quasi-perpendicular bow shock by the Magnetospheric Multiscale (MMS) spacecraft to compare competing non-stationarity processes. Using MMS's high cadence kinetic plasma measurements, we show that the shock exhibits non-stationarity in the form of ripples.

Place, publisher, year, edition, pages
2016.
National Category
Fusion, Plasma and Space Physics
Identifiers
URN: urn:nbn:se:uu:diva-303649DOI: 10.1103/PhysRevLett.117.165101ISI: 000385641500003OAI: oai:DiVA.org:uu-303649DiVA: diva2:991797
Funder
Swedish National Space Board, 139/12 97/13
Available from: 2016-09-29 Created: 2016-09-21 Last updated: 2016-11-21Bibliographically approved
In thesis
1. Ion dynamics and structure of collisionless shocks
Open this publication in new window or tab >>Ion dynamics and structure of collisionless shocks
2016 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

Shock waves are responsible for slowing down and heating supersonic flows. In collisionless space plasmas, shocks are able to accelerate particles to very high energies. We study injection of suprathermal ions at Earth’s quasi- parallel shock using high time resolution data from the Cluster spacecraft. We find that solar wind ions reflect off short large-amplitude magnetic structures (SLAMSs) and are subsequently accelerated by the convection electric field. We also use data from the closely-spaced Magnetospheric MultiScale (MMS) spacecraft to compare competing non-stationarity processes at Earth’s quasi- perpendicular bow shock. Using MMS’s high cadence plasma measurements, we find that the shock exhibits non-stationarity in the form of ripples.

Place, publisher, year, edition, pages
Uppsala University, 2016. 24 p.
National Category
Fusion, Plasma and Space Physics
Identifiers
urn:nbn:se:uu:diva-303636 (URN)
Presentation
2016-09-22, Häggsalen, Ångströmslaboratoriet, Lägerhyddsvägen 1, Uppsala, 10:58 (English)
Opponent
Supervisors
Funder
Swedish National Space Board, 97/13
Available from: 2016-09-29 Created: 2016-09-21 Last updated: 2016-09-29Bibliographically approved

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Johlander, AndreasVaivads, AndrisKhotyaintsev, Yuri V.
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Department of Physics and AstronomySwedish Institute of Space Physics, Uppsala Division
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