Collisionless shocks are ubiquitous in the Universe as a consequence of supersonic plasma flows sweeping through interstellar and intergalactic media. These shocks are the cause of many observed astrophysical phenomena, but details of shock structure and behavior remain controversial because of the lack of ways to study them experimentally. Laboratory experiments reported here, with astrophysically relevant plasma parameters, demonstrate for the first time the formation of a quasiperpendicular magnetized collisionless shock. In the upstream it is fringed by a filamented turbulent region, a rudiment for a secondary Weibel-driven shock. This turbulent structure is found responsible for electron acceleration to energies exceeding the average energy by two orders of magnitude.

Collisionless shocks driven by supersonic plasma flows with self-generated magnetic fields / Li, C.  K.; Tikhonchuk, V.  T.; Moreno, Q.; Sio, H.; D’Humières, E.; Ribeyre, X.; Korneev, Ph.; Atzeni, S.; Betti, R.; Birkel, A.; Campbell, E.  M.; Follett, R.  K.; Frenje, J.  A.; Hu, S.  X.; Koenig, M.; Sakawa, Y.; Sangster, T.  C.; Seguin, F.  H.; Takabe, H.; Zhang, S.; Petrasso, R.  D.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 123:5(2019). [10.1103/PhysRevLett.123.055002]

Collisionless shocks driven by supersonic plasma flows with self-generated magnetic fields

Atzeni, S.;
2019

Abstract

Collisionless shocks are ubiquitous in the Universe as a consequence of supersonic plasma flows sweeping through interstellar and intergalactic media. These shocks are the cause of many observed astrophysical phenomena, but details of shock structure and behavior remain controversial because of the lack of ways to study them experimentally. Laboratory experiments reported here, with astrophysically relevant plasma parameters, demonstrate for the first time the formation of a quasiperpendicular magnetized collisionless shock. In the upstream it is fringed by a filamented turbulent region, a rudiment for a secondary Weibel-driven shock. This turbulent structure is found responsible for electron acceleration to energies exceeding the average energy by two orders of magnitude.
2019
plasma Physics, collisionless shocks, Weibel instability
01 Pubblicazione su rivista::01a Articolo in rivista
Collisionless shocks driven by supersonic plasma flows with self-generated magnetic fields / Li, C.  K.; Tikhonchuk, V.  T.; Moreno, Q.; Sio, H.; D’Humières, E.; Ribeyre, X.; Korneev, Ph.; Atzeni, S.; Betti, R.; Birkel, A.; Campbell, E.  M.; Follett, R.  K.; Frenje, J.  A.; Hu, S.  X.; Koenig, M.; Sakawa, Y.; Sangster, T.  C.; Seguin, F.  H.; Takabe, H.; Zhang, S.; Petrasso, R.  D.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 123:5(2019). [10.1103/PhysRevLett.123.055002]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1306278
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