skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Optical control of electron phase space in plasma accelerators with incoherently stacked laser pulses

Abstract

It is demonstrated that synthesizing an ultrahigh-bandwidth, negatively chirped laser pulse by incoherently stacking pulses of different wavelengths makes it possible to optimize the process of electron self-injection in a dense, highly dispersive plasma (n{sub 0}∼10{sup 19} cm{sup −3}). Avoiding transformation of the driving pulse into a relativistic optical shock maintains a quasi-monoenergetic electron spectrum through electron dephasing and boosts electron energy far beyond the limits suggested by existing scaling laws. In addition, evolution of the accelerating bucket in a plasma channel is shown to produce a background-free, tunable train of femtosecond-duration, 35–100 kA, time-synchronized quasi-monoenergetic electron bunches. The combination of the negative chirp and the channel permits acceleration of electrons beyond 1 GeV in a 3 mm plasma with 1.4 J of laser pulse energy, thus offering the opportunity of high-repetition-rate operation at manageable average laser power.

Authors:
;  [1];  [2]; ;  [3]
  1. Department of Physics and Astronomy, University of Nebraska – Lincoln, Lincoln, Nebraska 68588-0299 (United States)
  2. CEA, DAM, DIF, Arpajon F-91297 (France)
  3. Laboratoire d'Optique Appliquée, ENSTA-CNRS-École Polytechnique UMR 7639, Palaiseau F-91761 (France)
Publication Date:
OSTI Identifier:
22410416
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 22; Journal Issue: 5; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1070-664X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ACCELERATION; ELECTRON BEAM INJECTION; ELECTRON SPECTRA; ELECTRONS; GEV RANGE; LASERS; PHASE SPACE; PLASMA GUNS; PULSES; RELATIVISTIC RANGE; SCALING LAWS; WAVELENGTHS

Citation Formats

Kalmykov, S. Y., E-mail: skalmykov2@unl.edu, Shadwick, B. A., Davoine, X., Lehe, R., and Lifschitz, A. F. Optical control of electron phase space in plasma accelerators with incoherently stacked laser pulses. United States: N. p., 2015. Web. doi:10.1063/1.4920962.
Kalmykov, S. Y., E-mail: skalmykov2@unl.edu, Shadwick, B. A., Davoine, X., Lehe, R., & Lifschitz, A. F. Optical control of electron phase space in plasma accelerators with incoherently stacked laser pulses. United States. doi:10.1063/1.4920962.
Kalmykov, S. Y., E-mail: skalmykov2@unl.edu, Shadwick, B. A., Davoine, X., Lehe, R., and Lifschitz, A. F. Fri . "Optical control of electron phase space in plasma accelerators with incoherently stacked laser pulses". United States. doi:10.1063/1.4920962.
@article{osti_22410416,
title = {Optical control of electron phase space in plasma accelerators with incoherently stacked laser pulses},
author = {Kalmykov, S. Y., E-mail: skalmykov2@unl.edu and Shadwick, B. A. and Davoine, X. and Lehe, R. and Lifschitz, A. F.},
abstractNote = {It is demonstrated that synthesizing an ultrahigh-bandwidth, negatively chirped laser pulse by incoherently stacking pulses of different wavelengths makes it possible to optimize the process of electron self-injection in a dense, highly dispersive plasma (n{sub 0}∼10{sup 19} cm{sup −3}). Avoiding transformation of the driving pulse into a relativistic optical shock maintains a quasi-monoenergetic electron spectrum through electron dephasing and boosts electron energy far beyond the limits suggested by existing scaling laws. In addition, evolution of the accelerating bucket in a plasma channel is shown to produce a background-free, tunable train of femtosecond-duration, 35–100 kA, time-synchronized quasi-monoenergetic electron bunches. The combination of the negative chirp and the channel permits acceleration of electrons beyond 1 GeV in a 3 mm plasma with 1.4 J of laser pulse energy, thus offering the opportunity of high-repetition-rate operation at manageable average laser power.},
doi = {10.1063/1.4920962},
journal = {Physics of Plasmas},
issn = {1070-664X},
number = 5,
volume = 22,
place = {United States},
year = {2015},
month = {5}
}