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Title: An accurate and efficient laser-envelope solver for the modeling of laser-plasma accelerators

Detailed and reliable numerical modeling of laser-plasma accelerators (LPAs), where a short and intense laser pulse interacts with an underdense plasma over distances of up to a meter, is a formidably challenging task. This is due to the great disparity among the length scales involved in the modeling, ranging from the micron scale of the laser wavelength to the meter scale of the total laser-plasma interaction length. The use of the time-averaged ponderomotive force approximation, where the laser pulse is described by means of its envelope, enables efficient modeling of LPAs by removing the need to model the details of electron motion at the laser wavelength scale. Furthermore, it allows simulations in cylindrical geometry which captures relevant 3D physics at 2D computational cost. A key element of any code based on the time-averaged ponderomotive force approximation is the laser envelope solver. In this paper we present the accurate and efficient envelope solver used in the code INF & RNO (INtegrated Fluid & paRticle simulatioN cOde). The features of the INF & RNO laser solver enable an accurate description of the laser pulse evolution deep into depletion even at a reasonably low resolution, resulting in significant computational speed-ups.
Authors:
 [1] ;  [1] ;  [1] ;  [1] ;  [1]
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Publication Date:
Grant/Contract Number:
AC02-05CH11231
Type:
Accepted Manuscript
Journal Name:
Plasma Physics and Controlled Fusion
Additional Journal Information:
Journal Volume: 60; Journal Issue: 1; Journal ID: ISSN 0741-3335
Publisher:
IOP Science
Research Org:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
OSTI Identifier:
1426749

Benedetti, C., Schroeder, C. B., Geddes, C. G. R., Esarey, E., and Leemans, W. P.. An accurate and efficient laser-envelope solver for the modeling of laser-plasma accelerators. United States: N. p., Web. doi:10.1088/1361-6587/aa8977.
Benedetti, C., Schroeder, C. B., Geddes, C. G. R., Esarey, E., & Leemans, W. P.. An accurate and efficient laser-envelope solver for the modeling of laser-plasma accelerators. United States. doi:10.1088/1361-6587/aa8977.
Benedetti, C., Schroeder, C. B., Geddes, C. G. R., Esarey, E., and Leemans, W. P.. 2017. "An accurate and efficient laser-envelope solver for the modeling of laser-plasma accelerators". United States. doi:10.1088/1361-6587/aa8977. https://www.osti.gov/servlets/purl/1426749.
@article{osti_1426749,
title = {An accurate and efficient laser-envelope solver for the modeling of laser-plasma accelerators},
author = {Benedetti, C. and Schroeder, C. B. and Geddes, C. G. R. and Esarey, E. and Leemans, W. P.},
abstractNote = {Detailed and reliable numerical modeling of laser-plasma accelerators (LPAs), where a short and intense laser pulse interacts with an underdense plasma over distances of up to a meter, is a formidably challenging task. This is due to the great disparity among the length scales involved in the modeling, ranging from the micron scale of the laser wavelength to the meter scale of the total laser-plasma interaction length. The use of the time-averaged ponderomotive force approximation, where the laser pulse is described by means of its envelope, enables efficient modeling of LPAs by removing the need to model the details of electron motion at the laser wavelength scale. Furthermore, it allows simulations in cylindrical geometry which captures relevant 3D physics at 2D computational cost. A key element of any code based on the time-averaged ponderomotive force approximation is the laser envelope solver. In this paper we present the accurate and efficient envelope solver used in the code INF & RNO (INtegrated Fluid & paRticle simulatioN cOde). The features of the INF & RNO laser solver enable an accurate description of the laser pulse evolution deep into depletion even at a reasonably low resolution, resulting in significant computational speed-ups.},
doi = {10.1088/1361-6587/aa8977},
journal = {Plasma Physics and Controlled Fusion},
number = 1,
volume = 60,
place = {United States},
year = {2017},
month = {10}
}