Description du projet
Comprendre la structure des chocs sans collision
Des ondes de choc sont présentes dans l’air et l’eau sur Terre et dans un large éventail de plasmas dans l’univers. Il s’agit généralement de plasmas sans collision. Le projet SHARP, financé par l’UE, entend contribuer à la compréhension de la structure des chocs sans collision dans divers environnements et des processus d’accélération à tous les stades du choc. Le projet intensifiera l’exploitation des données héliosphériques et effectuera une analyse comparative globale de l’arc de choc de la Terre et des chocs planétaires et interplanétaires. SHARP combinera les résultats des mesures in situ de chocs héliosphériques et de restes de supernovæ avec l’observation à distance de chocs astrophysiques lointains. Le projet développera également une base de données de haut niveau sur les chocs et des instruments innovants destinés à l’analyse des chocs.
Objectif
"SHARP aims to achieve a major leap in understanding of the structure of collisionless shocks in various environments and of the acceleration processes at all shock scales. This will be done by: (a) intensifying exploitation of the heliospheric data and performing a comprehensive comparative analysis of the Earth bow shock, planerary shocks, and interplanetary shocks, (b) establishing a collaboration of the world renown groups working together on all aspects of the shock physics, (c) utilizing and combining the knowledge obtained in in situ measurements on heliospheric shocks and in remote observations of distant astrophysical shocks, and (d) developing a high-level databases of shocks and advanced tools for the shock analysis and making them public. The research will encompass the three ""pillars"" of the shock physics: the shock structure, the shock energy deposition, and the radiation from the shock energized particles. The study will address the most fundamental unsolved issues of the shock physics: the structural changes of the shock with the increase of the Mach number, the intimate relation between the shock fields and the particle distributions, the injection problem, and the electron acceleration puzzle. The research will bridge over the in situ observed heliospheric shocks and supernovae remnant (SNR) shocks which are observed only indirectly, by emission from energized particles, by combining the knowledge of the heliospheric shock structure and constraints provided by the radiation measurements from SNR shocks. Starting with the observational data, the research will ultimately provide new diagnostic measures for the ongoing and future experiments, such that will allow to improve the efficiency of the measurements and data analysis, contribute to understanding of solar wind interaction with the Earth, and advance understanding of the most powerful accelerators in the Universe."
Champ scientifique
Programme(s)
Régime de financement
RIA - Research and Innovation actionCoordinateur
00560 Helsinki
Finlande