An accurate and efficient laserenvelope solver for the modeling of laserplasma accelerators
Detailed and reliable numerical modeling of laserplasma 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 laserplasma interaction length. The use of the timeaveraged 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 timeaveraged 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 speedups.
 Authors:

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 Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
 Publication Date:
 Grant/Contract Number:
 AC0205CH11231
 Type:
 Accepted Manuscript
 Journal Name:
 Plasma Physics and Controlled Fusion
 Additional Journal Information:
 Journal Volume: 60; Journal Issue: 1; Journal ID: ISSN 07413335
 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) (SC25)
 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 laserenvelope solver for the modeling of laserplasma accelerators. United States: N. p.,
Web. doi:10.1088/13616587/aa8977.
Benedetti, C., Schroeder, C. B., Geddes, C. G. R., Esarey, E., & Leemans, W. P.. An accurate and efficient laserenvelope solver for the modeling of laserplasma accelerators. United States. doi:10.1088/13616587/aa8977.
Benedetti, C., Schroeder, C. B., Geddes, C. G. R., Esarey, E., and Leemans, W. P.. 2017.
"An accurate and efficient laserenvelope solver for the modeling of laserplasma accelerators". United States.
doi:10.1088/13616587/aa8977. https://www.osti.gov/servlets/purl/1426749.
@article{osti_1426749,
title = {An accurate and efficient laserenvelope solver for the modeling of laserplasma 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 laserplasma 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 laserplasma interaction length. The use of the timeaveraged 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 timeaveraged 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 speedups.},
doi = {10.1088/13616587/aa8977},
journal = {Plasma Physics and Controlled Fusion},
number = 1,
volume = 60,
place = {United States},
year = {2017},
month = {10}
}