Simulation study of a passive plasma beam dump using varying plasma density

Kieran Hanahoe, Guoxing Xia, Mohammad Islam, Yangmei Li, Öznur Mete-Apsimon, Bernhard Hidding, Jonathan Smith

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    Abstract

    A plasma beam dump uses the collective oscillations of plasma electrons to absorb the kinetic energy of a particle beam. In this paper, a modified passive plasma beam dump scheme is proposed using either a gradient or stepped plasma profile to maintain a higher decelerating gradient compared with a uniform plasma. The improvement is a result of the plasma wavelength change preventing the re-acceleration of low energy particles. Particle-in-cell simulation results show that both stepped and gradient plasma profiles can achieve improved energy loss compared with a uniform plasma for an electron bunch of parameters routinely achieved in laser wakefield acceleration.

    Original languageEnglish
    Article number023120
    JournalPhysics of Plasmas
    Volume24
    Issue number2
    Early online date28 Feb 2017
    DOIs
    Publication statusPublished - Feb 2017

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