Enhancement and control of laser wakefields via a backward Raman amplifier

Ludwig, J. D.; Masson-Laborde, P. -E.; Hüller, S.; Rozmus, W.; Wilks, S. C.

doi:10.1063/1.5023387

Title: Enhancement and control of laser wakefields via a backward Raman amplifier

Journal Article · Tue May 01 00:00:00 EDT 2018 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.5023387· OSTI ID:1559913

Ludwig, J. D. ^[1];

^[2]; Hüller, S. ^[3]; Rozmus, W. ^[1]; Wilks, S. C. ^[4]

Univ. of Alberta, Edmonton, AB (Canada). Theoretical Physics Institute
CEA, DAM, DIF, Arbajon (France)
Univ. of Paris-Saclay (France). Centre de Physique Théorique, CNRS, Ecole Polytechnique
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

The Backward Raman Amplifier (BRA) is proposed as a possible scheme for improving laser driven plasma wakefields. One- and two-dimensional particle-in-cell code simulations and a 3-Wave coupling model are presented and compared to demonstrate how the BRA can be applied to the laser wakefield accelerator (LWFA) in the non-relativistic regime to counteract limitations such as pump depletion and diffraction. This article provides a discussion on optimal parameters for the combination of BRA and LWFA and a prescription for a BRA pump frequency chirp to ensure coupling beyond the particle dephasing limit. Simulation results demonstrate a reduction or alleviation of the effects of diffraction and an increase in wake amplitude and sustainability and provide direct insights into new methods of controlling plasma wakes in LWFA and other applications.

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Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC52-07NA27344; LLNL-JRNL-745719

OSTI ID:: 1559913

Alternate ID(s):: OSTI ID: 1438281

Report Number(s):: LLNL-JRNL-745719; 900179; TRN: US2000424

Journal Information:: Physics of Plasmas, Vol. 25, Issue 5; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 2 works

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