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

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)
13 Downloads (Pure)


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
Number of pages6
JournalPhysics of Plasmas
Issue number2
Publication statusPublished - 27 Feb 2017


  • plasma beam dump
  • plasma electrons
  • particle acceleration


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