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Title: Filtering higher-order laser modes using leaky plasma channels

In this paper, plasma structures based on leaky channels are proposed to filter higher-order laser mode content. The evolution and propagation of non-Gaussian laser pulses in leaky channels are studied, and it is shown that, for appropriate laser-plasma parameters, the higher-order laser mode content of the pulse may be removed while the fundamental mode remains well-guided. The behavior of multi-mode laser pulses is described analytically and numerically using envelope equations, including the derivation of the leakage coefficients, and compared to particle-in-cell simulations. Finally, laser pulse propagation, with reduced higher-order mode content, improves guiding in parabolic plasma channels, enabling extended interaction lengths for laser-plasma accelerator applications.
Authors:
 [1] ;  [2] ;  [2] ;  [2] ;  [1]
  1. Univ. of California, Berkeley, CA (United States). Dept. of Physics; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Berkeley Lab Laser Accelerator (BELLA) Center
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Berkeley Lab Laser Accelerator (BELLA) Center
Publication Date:
Grant/Contract Number:
AC02-05CH11231; PHY-1632796
Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 25; Journal Issue: 1; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Research Org:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25); National Science Foundation (NSF)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; laser plasma interactions; probability theory; semiclassical theories; differential equations; energy content; particle acceleration; particle-in-cell method; combustion
OSTI Identifier:
1461979
Alternate Identifier(s):
OSTI ID: 1415330