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- W4308613615 abstract "Fermi acceleration by collisionless shocks is believed to be the primary mechanism to produce high energy charged particles in the Universe,where charged particles gain energy successively from multiple reflections off the shock front.Here,we present the first direct experimental evidence of ion energization from reflection off a supercritical quasi perpendicular collisionless shock,an essential component of Fermi acceleration in a laser produced magnetized plasma. We observed a quasi monoenergetic ion beam with 2,4 times the shock velocity in the upstream flow using time of flight method. Our related kinetic simulations reproduced the energy gain and showed that these ions were first reflected and then accelerated mainly by the motional electric field associated with the shock. This mechanism can also explain the quasi monoenergetic fast ion component observed in the Earth's bow shock." @default.
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- W4308613615 date "2022-11-06" @default.
- W4308613615 modified "2023-10-17" @default.
- W4308613615 title "Laboratory observation of ion acceleration via reflection off laser-produced magnetized collisionless shocks" @default.
- W4308613615 doi "https://doi.org/10.48550/arxiv.2211.03090" @default.
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