Relativisitic particle acceleration in developing Alfve´n turbulence
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概要
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A new particle acceleration process in a developing Alfv´en turbulence in the course of successive parametricinstabilities of a relativistic pair plasma is investigated by utilizing one-dimensional electromagnetic full particlecode. Coherent wave–particle interactions result in efficient particle acceleration leading to a power-law-like energydistribution function. In the simulation, high-energy particles having large relativistic masses are preferentiallyaccelerated as the turbulence spectrum evolves in time. Themain accelerationmechanism is simultaneous relativisticresonance between a particle and two different waves. An analytical expression of maximum attainable energy insuch wave–particle interactions is derived.
- 2009-02-23
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