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

Abstract

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.

Authors:
 [1]; ORCiD logo [2];  [3];  [1];  [4]
  1. Univ. of Alberta, Edmonton, AB (Canada). Theoretical Physics Institute
  2. CEA, DAM, DIF, Arbajon (France)
  3. Univ. of Paris-Saclay (France). Centre de Physique Théorique, CNRS, Ecole Polytechnique
  4. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1559913
Alternate Identifier(s):
OSTI ID: 1438281
Report Number(s):
LLNL-JRNL-745719
Journal ID: ISSN 1070-664X; 900179; TRN: US2000424
Grant/Contract Number:  
AC52-07NA27344; LLNL-JRNL-745719
Resource Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 25; Journal Issue: 5; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Ludwig, J. D., Masson-Laborde, P. -E., Hüller, S., Rozmus, W., and Wilks, S. C. Enhancement and control of laser wakefields via a backward Raman amplifier. United States: N. p., 2018. Web. doi:10.1063/1.5023387.
Ludwig, J. D., Masson-Laborde, P. -E., Hüller, S., Rozmus, W., & Wilks, S. C. Enhancement and control of laser wakefields via a backward Raman amplifier. United States. https://doi.org/10.1063/1.5023387
Ludwig, J. D., Masson-Laborde, P. -E., Hüller, S., Rozmus, W., and Wilks, S. C. Tue . "Enhancement and control of laser wakefields via a backward Raman amplifier". United States. https://doi.org/10.1063/1.5023387. https://www.osti.gov/servlets/purl/1559913.
@article{osti_1559913,
title = {Enhancement and control of laser wakefields via a backward Raman amplifier},
author = {Ludwig, J. D. and Masson-Laborde, P. -E. and Hüller, S. and Rozmus, W. and Wilks, S. C.},
abstractNote = {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.},
doi = {10.1063/1.5023387},
journal = {Physics of Plasmas},
number = 5,
volume = 25,
place = {United States},
year = {Tue May 01 00:00:00 EDT 2018},
month = {Tue May 01 00:00:00 EDT 2018}
}

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TABLE I TABLE I: List of all simulations cases.

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Works referenced in this record:

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