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

doi:10.1063/1.4977449

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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6 Citations (Scopus)

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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 language	English
Article number	023120
Number of pages	6
Journal	Physics of Plasmas
Volume	24
Issue number	2
DOIs	https://doi.org/10.1063/1.4977449
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

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Hanahoe-etal-PP-2017-Simulation-study-of-a-passive-plasma-beam-dump-using-varying- plasma-densityFinal published version, 1.57 MB

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AU - Li, Yangmei

AU - Mete-Apsimon, Öznur

AU - Hidding, Bernhard

AU - Smith, Jonathan

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AB - 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.

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

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