General information
Organisation
The French Alternative Energies and Atomic Energy Commission (CEA) is a key player in research, development and innovation in four main areas :
• defence and security,
• nuclear energy (fission and fusion),
• technological research for industry,
• fundamental research in the physical sciences and life sciences.
Drawing on its widely acknowledged expertise, and thanks to its 16000 technicians, engineers, researchers and staff, the CEA actively participates in collaborative projects with a large number of academic and industrial partners.
The CEA is established in ten centers spread throughout France
Reference
SL-DRF-24-0390
Direction
DRF
Thesis topic details
Category
Corpuscular physics and outer space
Thesis topics
Study of the dynamics of the solar corona and wind at the maximum of magnetic cycle 25
Contract
Thèse
Job description
The Sun's activity is modulated according to an average 11-year magnetic cycle, with the next maximum expected in 2025. This increase in activity implies greater temporal variability for our star, both in terms of its magnetic field, with intense structures appearing and disappearing at a higher rate, and in terms of its atmosphere, which will produce a wind of charged particles that varies in speed and density. These variations have major consequences for the Earth, as it becomes more difficult to predict their impact on our technological society, such as radio blackouts or electrical surges. One of the greatest challenges facing space weather forecasting today is to provide reliable forecasts for the most variable events, which are often also the most extreme.
This thesis proposes to take advantage of the unprecedented conjunction of observations available for the next solar maximum with the Parker Solar Probe and Solar Orbiter space probes, in order to significantly improve the available solar wind models. The student will be able to calibrate the Wind Predict-AW 3D MHD model, one of the most advanced in Europe, to characterize its ability to reproduce conditions of maximum activity. This characterization will involve automated comparisons with different solar datasets, on highly parallel simulations (HPC) producing Big Data-scale results. He will also participate in the development of a new model capable of evolving magnetograms over time, based on the magneto-frictional approach and the evolution of the photospheric electric field - the most advanced techniques for the temporal evolution of magnetic structures - and will use them to quantify the information missing at maximum solar activity, and thus improve space weather forecasts.
University / doctoral school
Astronomie et Astrophysique d’Île de France (ED A&A)
Paris-Saclay
Thesis topic location
Site
Saclay
Requester
Position start date
01/10/2024
Person to be contacted by the applicant
PERRI Barbara barbara.perri@cea.fr
CEA
DRF/IRFU/DAP/LDE3
DAp-AIM
bat 709 orme des merisiers
point courrier 131
CEA Päris Saclay
91191 Gif-sur-Yvette
Tutor / Responsible thesis director
BRUN Allan Sacha sacha.brun@cea.fr
CEA
DSM/IRFU/DAp/LDE3
DRF/IRFU/DAp/LDE3
CEA/Saclay
Bat 709
91191 Gif-sur-Yvette, Cedex
+33 1 69 08 76 60
En savoir plus
https://fr.linkedin.com/in/barbara-perri-919773a5/en
https://irfu.cea.fr/dap/LDEE/index.php
https://wholesun.eu