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 language | English |
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Article number | 023120 |
Number of pages | 6 |
Journal | Physics of Plasmas |
Volume | 24 |
Issue number | 2 |
DOIs | |
Publication status | Published - 27 Feb 2017 |
Funding
This work was supported by the Cockcroft Institute Core Grant and the STFC. The authors gratefully acknowledge the computing time granted on the supercomputer JURECA at J?lich Supercomputing Centre (JSC).
Keywords
- plasma beam dump
- plasma electrons
- particle acceleration