FastQSL: A Fast Computation Method for Quasi-separatrix Layers

被引：12

作者：

Zhang, PeiJin ^{[1
,2
,3
,4
]}

Chen, Jun ^{[4
,5
,6
]}

Liu, Rui ^{[4
,7
]}

Wang, ChuanBing ^{[4
,7
]}

机构：

[1] Bulgarian Acad Sci, Inst Astron & Natl Astron Observ, Sofia 1784, Bulgaria

[2] Netherlands Inst Radio Astron, ASTRON, Oude Hoogeveensedijk 4, NL-7991 PD Dwingeloo, Netherlands

[3] Dublin Inst Adv Studies, Astron & Astrophys Sect, Dublin 2, Ireland

[4] Univ Sci & Technol China, CAS Key Lab Geospace Environm, Sch Earth & Space Sci, Hefei 230026, Anhui, Peoples R China

[5] Nanjing Univ, Sch Astron & Space Sci, Nanjing 210023, Peoples R China

[6] Nanjing Univ, Minist Educ, Key Lab Modern Astron & Astrophys, Nanjing 210093, Peoples R China

[7] Univ Sci & Technol China, CAS Ctr Excellence Comparat Planetol, Hefei 230026, Anhui, Peoples R China

来源：

ASTROPHYSICAL JOURNAL | 2022年 / 937卷 / 01期

基金：

中国国家自然科学基金;

关键词：

3-DIMENSIONAL MAGNETIC RECONNECTION; NULL POINTS; SQUASHING FACTORS;

D O I：

10.3847/1538-4357/ac8d61

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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.

引用

页数：9

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