A Multi-GPU Particle Framework Empowering High-Performance Computing for Space Physics
Amitis models the complex interactions between plasma, planetary surfaces, and magnetospheres, bridging electromagnetic and kinetic processes.
Amitis integrates electromagnetic induction currents generated within planetary interiors with their interaction in the surrounding plasma environment.
Amitis has been successfully utilized to study plasma interaction with the following solar system bodies: Mercury, Moon, Earth, Mars, Ceres, Psyche, Ganymede, Comet 67P
Moon, Ganymede, Ceres, Psyche, Comet 67P
Earth, Mercury, Ganymede
Mars, Ganymede, Mercury, Moon, Comet 67P
Moon, Ceres, Psyche
Amitis hybrid simulations show the dynamics of thermal O+ and H+ ions at Ganymede's magnetopause, inside and outside the Jovian plasma sheet. Power density at the magnetopause is mostly positive, reaching up to +20 nW/m3 locally. Ion velocity distributions are non-Maxwellian, with O+ and H+ ions gaining energy by factors of 8 and 30, respectively, reaching up to 1 MeV. Our results align well with Galileo observations, capturing the size and structure of Ganymede's magnetosphere.
https://doi.org/10.1029/2021JA029863
The figure shows the structure of Ganymede's magnetosphere and field-aligned currents.
Magnetosheath jets are dynamic pressure enhancements in the magnetosheath that influence the magnetopause and magnetosphere, playing a key role in solar wind-magnetosphere coupling. Using Amitis, we present the first global 3D hybrid-kinetic simulations of Earth without scaling. This study reveals that jets are not simple cylinders but complex, interconnected structures that evolve dynamically as they intrude the magnetosheath.
https://doi.org/10.1093/mnras/stae1456
The figure shows the global structure of the solar wind interaction with Earth at realistic scales.
Future lunar exploration will increase anthropogenic gas emissions into the lunar exosphere, potentially altering its plasma environment. Amitis hybrid simulations show that while Artemis landings will have minimal impact, higher ionization levels from frequent landings or human settlements could significantly disrupt the Moon’s solar wind interaction and plasma structure.
https://doi.org/10.1016/j.asr.2024.05.048
The figure shows the anthropogenic exosphere generated by heavy landings on the Moon..
Using global hybrid simulations with the Amitis code, we explore how a radial interplanetary magnetic field (IMF) affects solar wind ions entering the comet's diamagnetic cavity. The results show that when the IMF is aligned with the solar wind velocity, no bow shock forms, allowing solar wind ions to penetrate the cavity, consistent with observations from the Rosetta spacecraft.
https://doi.org/10.1051/0004-6361/202348186
The figure shows the proton density around comet 67P / Churyumov-Gerasimenko
Amitis hybrid simulations of the Mars–solar wind interaction reveal that the electric field morphology is influenced by the interplanetary magnetic field (IMF) direction and plasma conditions. We showed the hemispherical asymmetry in the electric field, dominance of the motional electric field in most regions, and the Hall term's varying significance in different IMF configurations.
https://doi.org/10.1093/mnras/stad247
The figure shows the morphology of the Hall electric field term in the Martian magnetosphere.
Associate Professor
Umeå University
Umeå, Sweden
Professor
University of California
at Santa Cruz, CA, USA
Associate Professor
Umeå University
Umeå, Sweden
Postdoctoral Researcher
Umeå University
Umeå, Sweden
PhD Student
Umeå University
Umeå, Sweden
Associate Researcher
University of California
at Berkeley, CA, USA
Postdoctoral Researcher
Chinese Academy of Sciences
Beijing, China
Associate Researcher
University of California
at Berkeley, CA, USA
Senior Researcher
Swedish Institute of Space Physics, Kiruna, Sweden
PhD Student
Swedish Institute of Space Physics, Kiruna, Sweden
If you have any questions about Amitis or are interested in running the code, we are here to assist you. If you'd like us to set up the code for you, please don't hesitate to contact us!
