FastQSL: A Fast Computation Method for Quasi-separatrix Layers

Pei Jin Zhang; Jun Chen; Rui Liu; Chuan Bing Wang

doi:10.3847/1538-4357/ac8d61

FastQSL: A Fast Computation Method for Quasi-separatrix Layers

Pei Jin Zhang
, Jun Chen
, Rui Liu
, Chuan Bing Wang

Cooperative Programs for the Advancement of Earth System Science

Research output: Contribution to journal › Article › peer-review

22 Scopus citations

Abstract

Magnetic reconnection preferentially takes place at the intersection of two separatrices or two quasi-separatrix layers, which can be quantified by the squashing factor Q, whose calculation is computationally expensive due to the need to trace as many field lines as possible. We developed a method (FastQSL) optimized for obtaining Q and the twist number in a 3D data cube. FastQSL utilizes the hardware acceleration of the graphics processing unit and adopts a step-size adaptive scheme for the most computationally intensive part: tracing magnetic field lines. As a result, it achieves a computational efficiency of 4.53 million Q values per second. FastQSL is open source, and user-friendly for data import, export, and visualization.

Original language	English
Article number	26
Journal	Astrophysical Journal
Volume	937
Issue number	1
DOIs	https://doi.org/10.3847/1538-4357/ac8d61
State	Published - Sep 1 2022

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title = "FastQSL: A Fast Computation Method for Quasi-separatrix Layers",

abstract = "Magnetic reconnection preferentially takes place at the intersection of two separatrices or two quasi-separatrix layers, which can be quantified by the squashing factor Q, whose calculation is computationally expensive due to the need to trace as many field lines as possible. We developed a method (FastQSL) optimized for obtaining Q and the twist number in a 3D data cube. FastQSL utilizes the hardware acceleration of the graphics processing unit and adopts a step-size adaptive scheme for the most computationally intensive part: tracing magnetic field lines. As a result, it achieves a computational efficiency of 4.53 million Q values per second. FastQSL is open source, and user-friendly for data import, export, and visualization.",

author = "Zhang, \{Pei Jin\} and Jun Chen and Rui Liu and Wang, \{Chuan Bing\}",

note = "Publisher Copyright: {\textcopyright} 2022. The Author(s). Published by the American Astronomical Society.",

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doi = "10.3847/1538-4357/ac8d61",

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T2 - A Fast Computation Method for Quasi-separatrix Layers

AU - Zhang, Pei Jin

AU - Chen, Jun

AU - Liu, Rui

AU - Wang, Chuan Bing

PY - 2022/9/1

Y1 - 2022/9/1

N2 - Magnetic reconnection preferentially takes place at the intersection of two separatrices or two quasi-separatrix layers, which can be quantified by the squashing factor Q, whose calculation is computationally expensive due to the need to trace as many field lines as possible. We developed a method (FastQSL) optimized for obtaining Q and the twist number in a 3D data cube. FastQSL utilizes the hardware acceleration of the graphics processing unit and adopts a step-size adaptive scheme for the most computationally intensive part: tracing magnetic field lines. As a result, it achieves a computational efficiency of 4.53 million Q values per second. FastQSL is open source, and user-friendly for data import, export, and visualization.

AB - Magnetic reconnection preferentially takes place at the intersection of two separatrices or two quasi-separatrix layers, which can be quantified by the squashing factor Q, whose calculation is computationally expensive due to the need to trace as many field lines as possible. We developed a method (FastQSL) optimized for obtaining Q and the twist number in a 3D data cube. FastQSL utilizes the hardware acceleration of the graphics processing unit and adopts a step-size adaptive scheme for the most computationally intensive part: tracing magnetic field lines. As a result, it achieves a computational efficiency of 4.53 million Q values per second. FastQSL is open source, and user-friendly for data import, export, and visualization.

UR - https://www.scopus.com/pages/publications/85139449434

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VL - 937

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1

M1 - 26

ER -

FastQSL: A Fast Computation Method for Quasi-separatrix Layers

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