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Contenido archivado el 2022-12-23

ION AND ELECTRON SCALES IN MASS AND ENERGY TRANSFER: MAGNETOSPHERIC MAPPING, MODELING AND FUTURE MISSIONS

Objetivo

Our project precedes the established cooperation and provide a bridge for future space missions aimed to micro scales in a study of magnetosphere plasma transport processes. It can provide a guideline for transport processes in astrophysical and laboratory plasma as well.
The main goal is to find evidences for presence of the ion and electron micro-scales in the modern data sets (e.g. in Cluster and Interball ones). Comparison with the dynamics of simulated kinetic current sheets and usage of the Gas Dynamic Convection Field model for gathering together multi-point measurements promises a step towards designing of the future small-scale missions. Historically the respective ROY Project had been proposed by the famous Soviet space physicist Yury Galperin in seventies, which has been revived in the modern Russian Space Program. We prove our approach to the problem by comparison of the different indirect methods.
One of the indirect methods is based on the Maxwellian equation: curl B ~ j , which provides in a plane quasi-stationary geometry a scale L estimate: |B|/ |j| ~ L.
Another one uses different spectral properties of the ion and electron moments at the respective scales (which correspond to fraction of Hz for the ion scales and to several Hz for the electron ones, while a spacecraft crosses corresponding structures in magnetosphere boundary layers). Modern wavelet coherence and bi-coherence analysis would facilitate our research. We plan to prove and/or modify the existed approaches for the comprehensive statistical mapping of the small-scale disturbances in the magnetosphere boundary layers (e.g. at the outer polar cusp border, in plasma sheet boundary layer and auroral regions), elaborate recommendations for strategic and methods of the future missions, and do a step in evaluating of the nonlinear cascade-like interactions into the plasma transport, as compared with the laminar reconnection of anti-parallel magnetic fields. For the developed turbulence at high-latitude magnetopause the nonlinear cascades should transfer energy down to electron skin-scales in wide regions, for the ‘classical’ laminar reconnections they should be limited in very narrow ‘diffusion regions’. We are aimed to distinguish those extreme cases and to simulate multi-spacecraft tomography on the basis of the highest-resolution data in hands.

Convocatoria de propuestas

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Régimen de financiación

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Coordinador

Polish Academy of Sciences Space Research Center
Aportación de la UE
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Dirección
Bartycka 18A
00716 Warsaw
Polonia

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Coste total
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Participantes (6)