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Title: Multi-electron beam generation using co-propagating, parallel laser beams

Abstract

High intensity short pulse laser plasma interaction experiments were performed to investigate laser wakefield acceleration (LWFA) in the 'bubble' regime. Using a specially designed phase plate, two high intensity laser focal spots were generated adjacent to each other with a transverse spacing of 70 μm and were focused onto a low density plasma target. We found that this configuration generated two simultaneous relativistic electron beams from LWFA (with low divergence) and that these beams often interact strongly with each other for longer propagation distances in the plasma thus reducing beam quality. In addition, it was observed that the existence of an adjacent laser driven wakefield significantly reduced the self-trapping threshold for injection of electrons. Numerical modeling of these interactions demonstrated similar phenomena and also showed that electron beam properties can be affected through precise control of the phase and polarization of the incident laser beam.

Authors:
 [1];  [2];  [2];  [2];  [1];  [2];  [2];  [2];  [1]; ORCiD logo [2]
  1. Air Force Research Lab. (AFRL), Kirtland AFB, Albuquerque, NM (United States)
  2. Univ. of Michigan, Ann Arbor, MI (United States)
Publication Date:
Research Org.:
Univ. of Michigan, Ann Arbor, MI (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1500051
Grant/Contract Number:  
NA0002372
Resource Type:
Accepted Manuscript
Journal Name:
New Journal of Physics
Additional Journal Information:
Journal Volume: 20; Journal Issue: 9; Journal ID: ISSN 1367-2630
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Elle, J., Zhao, T. Z., Ma, Y., Behm, K., Lucero, A., Maksimchuk, A., Nees, J. A., Thomas, A. G. R., Schmitt-Sody, A., and Krushelnick, K. Multi-electron beam generation using co-propagating, parallel laser beams. United States: N. p., 2018. Web. doi:10.1088/1367-2630/aaded4.
Elle, J., Zhao, T. Z., Ma, Y., Behm, K., Lucero, A., Maksimchuk, A., Nees, J. A., Thomas, A. G. R., Schmitt-Sody, A., & Krushelnick, K. Multi-electron beam generation using co-propagating, parallel laser beams. United States. doi:10.1088/1367-2630/aaded4.
Elle, J., Zhao, T. Z., Ma, Y., Behm, K., Lucero, A., Maksimchuk, A., Nees, J. A., Thomas, A. G. R., Schmitt-Sody, A., and Krushelnick, K. Tue . "Multi-electron beam generation using co-propagating, parallel laser beams". United States. doi:10.1088/1367-2630/aaded4. https://www.osti.gov/servlets/purl/1500051.
@article{osti_1500051,
title = {Multi-electron beam generation using co-propagating, parallel laser beams},
author = {Elle, J. and Zhao, T. Z. and Ma, Y. and Behm, K. and Lucero, A. and Maksimchuk, A. and Nees, J. A. and Thomas, A. G. R. and Schmitt-Sody, A. and Krushelnick, K.},
abstractNote = {High intensity short pulse laser plasma interaction experiments were performed to investigate laser wakefield acceleration (LWFA) in the 'bubble' regime. Using a specially designed phase plate, two high intensity laser focal spots were generated adjacent to each other with a transverse spacing of 70 μm and were focused onto a low density plasma target. We found that this configuration generated two simultaneous relativistic electron beams from LWFA (with low divergence) and that these beams often interact strongly with each other for longer propagation distances in the plasma thus reducing beam quality. In addition, it was observed that the existence of an adjacent laser driven wakefield significantly reduced the self-trapping threshold for injection of electrons. Numerical modeling of these interactions demonstrated similar phenomena and also showed that electron beam properties can be affected through precise control of the phase and polarization of the incident laser beam.},
doi = {10.1088/1367-2630/aaded4},
journal = {New Journal of Physics},
number = 9,
volume = 20,
place = {United States},
year = {2018},
month = {9}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Figures / Tables:

Figure 1 Figure 1: Schematic of themirror used to induce pi phase shift. Beam incident on the portion of themirrorwithout the additional SiO2 layer travels 400 nm (λ/2) farther.

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