Tree code for collision detection of large numbers of particles applied to the Breit-Wheeler process

JOURNAL OF COMPUTATIONAL PHYSICS

卷:355

Article

Jansen, O.¹  d'Humieres, E.¹  Ribeyre, X.¹  Jequier, S.¹  Tikhonchuk, V. T.¹ 

[1] Univ Bordeaux, CNRS, CEA, Ctr Lasers Intenses & Applicat,UMR 5107, F-33405 Talence, France

关键词: Tree code;    Collision detection;    QED;    Breit-Wheeler process;    Pair creation;    Astrophysics;   

DOI  :  10.1016/j.jcp.2017.11.021

来源: Elsevier

【 摘 要 】

Collision detection of a large number N of particles can be challenging. Directly testing N particles for collisions among each other leads to N-2 queries. Especially in scenarios, where fast, densely packed particles interact, challenges arise for classical methods like Particle-in-Cell or Monte-Carlo. Modern collision detection methods utilising bounding volume hierarchies are suitable to overcome these challenges and allow a detailed analysis of the interaction of large number of particles. This approach is applied to the analysis of the collision of two photon beams leading to the creation of electron-positron pairs. (c) 2017 Elsevier Inc. All rights reserved.

【 授权许可】

Free