Performance analysis and implementation details of the Energy Conserving Semi-Implicit Method code (ECsim)

Gonzalez-Herrero, Diego; Boella, Elisabetta; Lapenta, Giovanni

doi:10.1016/j.cpc.2018.03.020

Performance analysis and implementation details of the Energy Conserving Semi-Implicit Method code (ECsim)

Journal Article · Tue Mar 27 00:00:00 EDT 2018 · Computer Physics Communications

DOI:https://doi.org/10.1016/j.cpc.2018.03.020· OSTI ID:1543535

Gonzalez-Herrero, Diego ^[1]; Boella, Elisabetta ^[1]; Lapenta, Giovanni ^[1]

Katholieke Univ. Leuven, Heverlee (Belgium)

We present in this work the implementation of the Energy Conserving Semi-Implicit Method in a parallel code called ECsim. This new code is a three-dimensional, fully electromagnetic particle in cell (PIC) code. It is written in C/C++ and uses MPI to allow massive parallelization. ECsim is unconditionally stable in time, eliminates the finite grid instability, and has the same cycle scheme as the explicit code with a computational cost comparable to other semi-implicit PIC codes. All these features make it a very valuable tool to address situations which have not been possible to analyze until now with other PIC codes. In this work, we show the details of the algorithm implementation and we study its performance in different systems. ECsim is compared with another semi-implicit PIC code with different time and spectral resolution, showing its ability to address situations where other codes fail.

View Accepted Manuscript (DOE)

Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC); Univ. of California, Oakland, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 1543535

Alternate ID(s):: OSTI ID: 1582836

Journal Information:: Computer Physics Communications, Journal Name: Computer Physics Communications Journal Issue: C Vol. 229; ISSN 0010-4655

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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