Particle energization in colliding subcritical collisionless shocks investigated in the laboratory

0567692 - FZÚ 2023 RIV FR eng J - Journal Article
Fazzini, A. - Yao, W. - Burdonov, K. - Beard, J. - Chen, S.N. - Ciardi, A. - Humiéres, E. D. - Diab, R. - Filippov, E.D. - Kisyov, S. - Lelasseux, V. - Miceli, M. - Moreno-Gelos, Quentin - Orlando, S. - Pikuz, S. - Ribeyre, X. - Starodubtsev, M. - Zemskov, R. - Fuchs, J.
Particle energization in colliding subcritical collisionless shocks investigated in the laboratory.
Astronomy & Astrophysics. Roč. 665, SEP (2022), č. článku A87. ISSN 0004-6361. E-ISSN 1432-0746
Institutional support: RVO:68378271
Keywords : shock waves * acceleration of particles * interplanetary medium
OECD category: Astronomy (including astrophysics,space science)
Impact factor: 6.5, year: 2022
Method of publishing: Open access

We find that in the presence of two shocks, the ambient ions reach energies around 1.5 times of those obtained with single shocks. Both the presence of the downstream zone of the second shock and of the downstream zone common for the two shocks play a role in the di erent energization: the characteristics of the perpendicular electric fields in the two areas indeed allow for certain particles to continue being accelerated or, at least, to avoid being decelerated. Conclusions. The findings of our laboratory investigation are relevant for our understanding of the energy distribution of high-energy particles that populate the interplanetary space in our solar system and the very local interstellar medium around the heliopause, where observations have indicated evidence of subcritical collisionless shocks that may eventually go on to collide with one another.
Permanent Link: https://hdl.handle.net/11104/0338924