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Title: Direct laser acceleration of electrons in the plasma bubble by tightly focused laser pulses

Abstract

We present an analytical theory that reveals the importance of the longitudinal laser electric field in the course of the resonant acceleration of relativistic electrons by a tightly confined laser beam. It is shown that this laser field component always counteracts the transverse one and effectively decreases the final energy gain of electrons via the direct laser acceleration (DLA) mechanism. This effect is demonstrated by carrying out particle-in-cell simulations of the DLA of the electrons injected into the accelerating phase of the plasma wake. It is shown that the electron energy gain from the wakefield is substantially compensated by the quasiresonant energy loss to the longitudinal laser field component. The analytically obtained scalings and estimates are in good agreement with the results of the numerical simulations.

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [1]
+ Show Author Affiliations
  1. Cornell Univ., Ithaca, NY (United States)
  2. Cornell Univ., Ithaca, NY (United States); Univ. of Texas, Austin, TX (United States)
  3. Univ. of California, San Diego, CA (United States)
Publication Date:
Research Org.:
Cornell Univ., Ithaca, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1613227
Alternate Identifier(s):
OSTI ID: 1547135
Grant/Contract Number:  
SC0019431
Resource Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 26; Journal Issue: 8; 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; Physics

Citation Formats

Wang, Tianhong, Khudik, Vladimir, Arefiev, Alexey, and Shvets, Gennady. Direct laser acceleration of electrons in the plasma bubble by tightly focused laser pulses. United States: N. p., 2019. Web. doi:10.1063/1.5110407.
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Wang, Tianhong, Khudik, Vladimir, Arefiev, Alexey, & Shvets, Gennady. Direct laser acceleration of electrons in the plasma bubble by tightly focused laser pulses. United States. https://doi.org/10.1063/1.5110407
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Wang, Tianhong, Khudik, Vladimir, Arefiev, Alexey, and Shvets, Gennady. Tue . "Direct laser acceleration of electrons in the plasma bubble by tightly focused laser pulses". United States. https://doi.org/10.1063/1.5110407. https://www.osti.gov/servlets/purl/1613227.
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@article{osti_1613227,
title = {Direct laser acceleration of electrons in the plasma bubble by tightly focused laser pulses},
author = {Wang, Tianhong and Khudik, Vladimir and Arefiev, Alexey and Shvets, Gennady},
abstractNote = {We present an analytical theory that reveals the importance of the longitudinal laser electric field in the course of the resonant acceleration of relativistic electrons by a tightly confined laser beam. It is shown that this laser field component always counteracts the transverse one and effectively decreases the final energy gain of electrons via the direct laser acceleration (DLA) mechanism. This effect is demonstrated by carrying out particle-in-cell simulations of the DLA of the electrons injected into the accelerating phase of the plasma wake. It is shown that the electron energy gain from the wakefield is substantially compensated by the quasiresonant energy loss to the longitudinal laser field component. The analytically obtained scalings and estimates are in good agreement with the results of the numerical simulations.},
doi = {10.1063/1.5110407},
journal = {Physics of Plasmas},
number = 8,
volume = 26,
place = {United States},
year = {Tue Aug 06 00:00:00 EDT 2019},
month = {Tue Aug 06 00:00:00 EDT 2019}
}
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Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1063/1.5110407
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Cited by: 14 works
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Figures / Tables:

FIG. 1 FIG. 1: Sketch of the electron motion and electric fields of the laser pulse propagating inside the ion channel. The electron gains energy through a resonant interaction with the laser wave. The phases of transverse and longitudinal components of the electric field [$E^{(L)}_{y}$ and $E^{(L)}_{ x}$] are shifted by π/2.
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