186 citations · 533 across the 25 of their papers we have counts for
24 papers
Post-Moore Technologies for Plasma Simulation: A Community Roadmap
Luca Pennati, Erik M. Åsgrim, Jeremy J. Williams +21
Plasma simulations are among the most computationally demanding scientific workloads, combining high-dimensional kinetic evolution, particle-mesh coupling, field solves, and data-i…
Geoelectric Field Caused by Flux Transfer Events in an Ionosphere-Coupled Vlasiator Simulation
Konstantinos Horaites, Markku Alho, Yann Pfau-Kempf +10
We report on the relationship between flux transfer events (FTEs) at Earth's magnetopause and the geoelectric field that is induced near the FTEs' magnetic footpoints. We study thi…
Deterministic and probabilistic neural surrogates of global hybrid-Vlasov simulations
Daniel Holmberg, Ivan Zaitsev, Markku Alho +5
Hybrid-Vlasov simulations resolve ion-kinetic effects in the solar wind-magnetosphere interaction, but even 5D (2D + 3V) configurations are computationally expensive. We show that…
Graph-based Neural Space Weather Forecasting
Daniel Holmberg, Ivan Zaitsev, Markku Alho +5
Accurate space weather forecasting is crucial for protecting our increasingly digital infrastructure. Hybrid-Vlasov models, like Vlasiator, offer physical realism beyond that of cu…
Load Balancing in Strongly Inhomogeneous Simulations -- a Vlasiator Case Study
Leo Kotipalo, Markus Battarbee, Yann Pfau-Kempf +2
Parallelization is a necessity for large-scale simulations due to the amount of data processed. In this article we investigate different load balancing methods using Vlasiator, a g…
Coalescing MPI communication in 6D Vlasov simulations: solving ghost domains in Vlasiator
Markus Battarbee, Urs Ganse, Yann Pfau-Kempf +3
High-performance computing is used for diverse simulations, some of which parallelize over the Message Passing Interface (MPI) with ease, whilst others may have challenges related…
Simulation Models for Exploring Magnetic Reconnection
Michael Shay, Subash Adhikari, Naoki Beesho +22
Simulations have played a critical role in the advancement of our knowledge of magnetic reconnection. However, due to the inherently multiscale nature of reconnection, it is imposs…
Porting the grid-based 3D+3V hybrid-Vlasov kinetic plasma simulation Vlasiator to heterogeneous GPU architectures
Markus Battarbee, Konstantinos Papadakis, Urs Ganse +5
Vlasiator is a space plasma simulation code which models near-Earth ion-kinetic dynamics in three spatial and three velocity dimensions. It is highly parallelized, modeling the Vla…
Unveiling plasma energization and energy transport in the Earth Magnetospheric System: the need for future coordinated multiscale observations
A. Retino, L. Kepko, H. Kucharek +31
Energetic plasma is everywhere in the Universe. The terrestrial Magnetospheric System is a key case where direct measures of plasma energization and energy transport can be made in…
Graph Representation of the Magnetic Field Topology in High-Fidelity Plasma Simulations for Machine Learning Applications
Ioanna Bouri, Fanni Franssila, Markku Alho +4
Topological analysis of the magnetic field in simulated plasmas allows the study of various physical phenomena in a wide range of settings. One such application is magnetic reconne…
Hybrid-Vlasov simulation of soft X-ray emissions at the Earth's dayside magnetospheric boundaries
Maxime Grandin, Hyunju K. Connor, Sanni Hoilijoki +5
Solar wind charge exchange produces emissions in the soft X-ray energy range which can enable the study of near-Earth space regions such as the magnetopause, the magnetosheath and…
First 3D hybrid-Vlasov global simulation of auroral proton precipitation and comparison with satellite observations
Maxime Grandin, Thijs Luttikhuis, Markus Battarbee +15
The precipitation of charged particles from the magnetosphere into the ionosphere is one of the crucial coupling mechanisms between these two regions of geospace and is associated…
Flux-tube-dependent propagation of Alfvén waves in the solar corona
Chaitanya Prasad Sishtla, Jens Pomoell, Emilia Kilpua +3
Alfvén-wave turbulence has emerged as an important heating mechanism to accelerate the solar wind. The generation of this turbulent heating is dependent on the presence and subsequ…
ULF wave transmission across collisionless shocks: 2.5D local hybrid simulations
Primoz Kajdic, Yann Pfau-Kempf, Lucile Turc +10
We study the interaction of upstream ultra-low frequency (ULF) waves with collisionless shocks by analyzing the outputs of eleven 2D local hybrid simulation runs. Our simulated sho…
Electron acceleration and radio emission following the early interaction of two coronal mass ejections
D. E. Morosan, E. Palmerio, J. E. Räsänen +6
Context. Coronal mass ejections (CMEs) are large eruptions of magnetised plasma from the Sun that are often accompanied by solar radio bursts produced by accelerated electrons. Aim…
Three-dimensional reconstruction of multiple particle acceleration regions during a coronal mass ejection
D. E. Morosan, E. Palmerio, J. Pomoell +3
Context. Some of the most prominent sources for particle acceleration in our Solar System are large eruptions of magnetised plasma from the Sun called coronal mass ejections (CMEs)…
Particle Telescope aboard FORESAIL-1: simulated performance
Philipp Oleynik, Rami Vainio, Hannu-Pekka Hedman +18
The Particle Telescope (PATE) of FORESAIL-1 mission is described. FORESAIL-1 is a CubeSat mission to polar Low Earth Orbit. Its scientific objectives are to characterize electron p…
Exploring Solar-Terrestrial Interactions via Multiple Observers (A White Paper for the Voyage 2050 long-term plan in the ESA Science Programme)
G. Branduardi-Raymont, M. Berthomier, Y. Bogdanova +24
This paper addresses the fundamental science question: "How does solar wind energy flow through the Earth's magnetosphere, how is it converted and distributed?". We need to underst…
FORESAIL-1 cubesat mission to measure radiation belt losses and demonstrate de-orbiting
FORESAIL collaboration, M. Palmroth, J. Praks +57
Today, the near-Earth space is facing a paradigm change as the number of new spacecraft is literally sky-rocketing. Increasing numbers of small satellites threaten the sustainable…
Vlasov methods in space physics and astrophysics
Minna Palmroth, Urs Ganse, Yann Pfau-Kempf +7
This paper reviews Vlasov-based numerical methods used to model plasma in space physics and astrophysics. Plasma consists of collectively behaving charged particles that form the m…
Windsock memory conditioned RAM (Co-Ram) pressure effect: forced reconnection in the Earth's magnetotail
Z. Vörös, G. Facskó, M. Khodachenko +3
Magnetic reconnection (MR) is a key physical concept explaining the addition of magnetic flux to the magnetotail and closed flux lines back-motion to the dayside magnetosphere. Thi…
Wave dispersion in the hybrid-Vlasov model: verification of Vlasiator
Yann Kempf, Dimitry Pokhotelov, Sebastian von Alfthan +3
Vlasiator is a new hybrid-Vlasov plasma simulation code aimed at simulating the entire magnetosphere of the Earth. The code treats ions (protons) kinetically through Vlasov's equat…
Parallel grid library for rapid and flexible simulation development
I. Honkonen, S. von Alfthan, A. Sandroos +2
We present an easy to use and flexible grid library for developing highly scalable parallel simulations. The distributed cartesian cell-refinable grid (dccrg) supports adaptive mes…
Supermagnetosonic jets behind a collisionless quasi-parallel shock
H. Hietala, T. V. Laitinen, K. Andréeová +7
The downstream region of a collisionless quasi-parallel shock is structured containing bulk flows with high kinetic energy density from a previously unidentified source. We present…