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Volume 43 - 2025

Latest volume of Laser and Particle Beams
Contents

Research Article

  • A mechanism that could stop the acceleration process within a collisionless shock

  • Antoine Bret, Asaf Pe’er
  • Published online by Cambridge University Press:
    10 February 2025, e1
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  • Collisionless shocks are complex non-linear structures that are not yet fully understood. In particular, the interaction between these shocks and the particles they accelerate remains elusive. Based on an instability analysis that relates the shock width to the spectrum of the accelerated particle and the shock density ratio, we find that the acceleration process could come to an end when the fraction of accelerated upstream particles reaches about 30%. Only unmagnetized shocks are considered.