Beam-driven plasma-based acceleration of electrons with density down-ramp injection at FLASHForward

Grebenyuk, J.; Mehrling, T.; Martinez de la Ossa, A.; Osterhoff, J.

doi:10.1016/j.nima.2013.10.054

Contribution to a conference proceedings/Journal Article

DESY-2014-00684

Beam-driven plasma-based acceleration of electrons with density down-ramp injection at FLASHForward

Grebenyuk, J. (Corresponding Author)DESY* ; Martinez de la Ossa, A.DESY* ; Mehrling, T.DESY* ; Osterhoff, J.DESY*

2014
North-Holland Publ. Co. Amsterdam

First European Advanced Accelerator Concepts Workshop 2013- Proceedings, EAAC 2013, La Biodola, Isola d'Elba, Italy, 2 Jun 2013 - 7 Jun 2013 Nuclear instruments & methods in physics research / A 740, 246–249 (2014) [10.1016/j.nima.2013.10.054]

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Abstract: We present simulations of injection of plasma electrons triggered by a negative gradient in the plasma-density profile for beam-driven plasma-wakefield acceleration. Studies show the potential of this trapping technique for the production of narrow-energy bandwidth, femtosecond, high-current electron beams with a small transverse normalised emittance in the hundred nm range. Moreover, the accelerated beams feature strong longitudinal phase-space correlations with sub-percent uncorrelated energy spreads. Tuning of density down-ramp injection is explored by scanning the slope and length of the downward transition. It is found that the mechanism causes particle trapping over a wide experimentally accessible parameter range. All simulations were performed in three spatial dimensions with the particle-in-cell code OSIRIS [1]. The investigated driver-beam properties and the plasma profile resemble expected experimental conditions at the FLASHForward facility at DESY.

Keyword(s): Plasma-based acceleration (LCSH) ; Beam-driven wakefield acceleration (LCSH) ; Density down-ramp injection (LCSH)

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