Microstructure in two- and three-dimensional hybrid simulations of perpendicular collisionless shocks

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378289%3A_____%2F16%3A00464290" target="_blank" >RIV/68378289:_____/16:00464290 - isvavai.cz</a>

Alternative codes found

RIV/67985815:_____/16:00463957

Result on the web

<a href="http://dx.doi.org/10.1017/S0022377816000660" target="_blank" >http://dx.doi.org/10.1017/S0022377816000660</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1017/S0022377816000660" target="_blank" >10.1017/S0022377816000660</a>

Result language

angličtina

Original language name

Microstructure in two- and three-dimensional hybrid simulations of perpendicular collisionless shocks

Original language description

Supercritical collisionless perpendicular shocks have an average macrostructure determined primarily by the dynamics of ions specularly reflected at the magnetic ramp. Within the overall macrostructure, instabilities, both linear and nonlinear, generate fluctuations and microstructure. To identify the sources of such microstructure, high-resolution two-and three-dimensional simulations have been carried out using the hybrid method, wherein the ions are treated as particles and the electron response is modelled as a massless fluid. We confirm the results of earlier two-dimensional (2-D) simulations showing both field-parallel aligned propagating fluctuations and fluctuations carried by the reflected-gyrating ions. In addition, it is shown that, for 2-D simulations of the shock coplanarity plane, the presence of short-wavelength fluctuations in all magnetic components is associated with the ion Weibel instability driven at the upstream edge of the foot by the reflected-gyrating ions. In 3-D simulations we show for the first time that the dominant microstructure is due to a coupling between field-parallel propagating fluctuations in the ramp and the motion of the reflected ions. This results in a pattern of fluctuations counter-propagating across the surface of the shock at an angle inclined to the magnetic field direction, due to a combination of field-parallel motion at the Alfven speed of the ramp and motion in the sense of gyration of the reflected ions.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BL - Plasma physics and discharge through gases

OECD FORD branch

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Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Plasma Physics

ISSN

0022-3778

e-ISSN

—

Volume of the periodical

82

Issue of the periodical within the volume

4

Country of publishing house

US - UNITED STATES

Number of pages

23

Pages from-to

"905820401/1"-"905820401/23"

UT code for WoS article

000381516900006

EID of the result in the Scopus database

2-s2.0-85014495068