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
收藏
页数：9
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