کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4964523 1447811 2017 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
About improving efficiency of the P3M algorithms when computing the inter-particle forces in beam dynamics
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
About improving efficiency of the P3M algorithms when computing the inter-particle forces in beam dynamics
چکیده انگلیسی
In the paper, a problem of improving efficiency of the particle-particle- particle-mesh (P3M) algorithm in computing the inter-particle electrostatic forces is considered. The particle-mesh (PM) part of the algorithm is modified in such a way that the space field equation is solved by the direct method of summation of potentials over the ensemble of particles lying not too close to a reference particle. For this purpose, a specific matrix “pattern” is introduced to describe the spatial field distribution of a single point charge, so the “pattern” contains pre-calculated potential values. This approach allows to reduce a set of arithmetic operations performed at the innermost of nested loops down to an addition and assignment operators and, therefore, to decrease the running time substantially. The simulation model developed in C++ substantiates this view, showing the descent accuracy acceptable in particle beam calculations together with the improved speed performance.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computer Physics Communications - Volume 212, March 2017, Pages 47-54
نویسندگان
, ,