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Specification of the near-Earth space environment with SHIELDS
Los Alamos Natl Lab, Los Alamos, NM 87545 USA..
Los Alamos Natl Lab, Los Alamos, NM 87545 USA..
Los Alamos Natl Lab, Los Alamos, NM 87545 USA..
Los Alamos Natl Lab, Los Alamos, NM 87545 USA..
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2018 (Engelska)Ingår i: Journal of Atmospheric and Solar-Terrestrial Physics, ISSN 1364-6826, E-ISSN 1879-1824, Vol. 177, s. 148-159Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Predicting variations in the near-Earth space environment that can lead to spacecraft damage and failure is one example of "space weather" and a big space physics challenge. A project recently funded through the Los Alamos National Laboratory (LANL) Directed Research and Development (LDRD) program aims at developing a new capability to understand, model, and predict Space Hazards Induced near Earth by Large Dynamic Storms, the SHIELDS framework. The project goals are to understand the dynamics of the surface charging environment (SCE), the hot (keV) electrons representing the source and seed populations for the radiation belts, on both macro and micro-scale. Important physics questions related to particle injection and acceleration associated with magnetospheric storms and substorms, as well as plasma waves, are investigated. These challenging problems are addressed using a team of world-class experts in the fields of space science and computational plasma physics, and state-of-the-art models and computational facilities. A full two-way coupling of physics-based models across multiple scales, including a global MHD (BATS-R-US) embedding a particle-in-cell (iPIC3D) and an inner magnetosphere (RAM-SCB) codes, is achieved. New data assimilation techniques employing in situ satellite data are developed; these provide an order of magnitude improvement in the accuracy in the simulation of the SCE. SHIELDS also includes a post-processing tool designed to calculate the surface charging for specific spacecraft geometry using the Curvilinear Particle-In-Cell (CPIC) code that can be used for reanalysis of satellite failures or for satellite design.

Ort, förlag, år, upplaga, sidor
PERGAMON-ELSEVIER SCIENCE LTD , 2018. Vol. 177, s. 148-159
Nyckelord [en]
Geomagnetic storms and substorms, Multiscale physics, Wave-particle interactions, Space hazards, Numerical modeling
Nationell ämneskategori
Astronomi, astrofysik och kosmologi
Identifikatorer
URN: urn:nbn:se:kth:diva-238144DOI: 10.1016/j.jastp.2017.11.006ISI: 000447110300017Scopus ID: 2-s2.0-85044660164OAI: oai:DiVA.org:kth-238144DiVA, id: diva2:1261632
Konferens
3rd International Symposium on Recent Observations and Simulations of the Sun-Earth System (ISROSES), SEP 11-16, 2016, Golden Sands, BULGARIA
Anmärkning

QC 20181108

Tillgänglig från: 2018-11-08 Skapad: 2018-11-08 Senast uppdaterad: 2018-11-08Bibliografiskt granskad

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Markidis, Stefano

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