| Title |
An Improved Parallel Poisson Solver for Space Charge Calculation in Beam Dynamics Simulation |
| Authors |
- D. Zheng, U. van Rienen
Rostock University, Faculty of Computer Science and Electrical Engineering, Rostock, Germany
- J. Qiang
LBNL, Berkeley, California, USA
|
| Abstract |
In numerous beam dynamics simulation of particle accelerators, the space charge calculation is a critical issue. The ways to calculate the space charge force vary in different kinds of methods. A common method based on Green's function in free space is often implemented in various PIC (particle-in-cell) simulation codes for beam tracking. However, the calculation time of the Poisson solver for both, serial and parallel cases can reach a high percentage of the whole simulation time consumption. In this paper, we present an improved parallel Poisson solver. The enhanced solver focused on three aspects of efficiency improvement: using the reduced integrated Green's function, using the discrete cosine transform for Green's function, using a novel fast implicitly zero-padded convolution routine. The amended, parallel Poisson solver is implemented using MPI and Open MP. We study the strong scaling and the weak scaling for the scalability property of the Poisson solver, too. The novel solver is integrated into the IMPACT-T code in order to compare it to the commonly used Poisson solver.
|
| Funding |
Dawei Zheng is supported by the China Scholarship Council. This research was partially supported by the U.S.Department of Energy under Contract no.DE-AC02-05CH11231. |
| Paper |
download TUCWC2.PDF [0.280 MB / 4 pages] |
| Slides |
download TUCWC2_TALK.PDF [1.320 MB] |
| Conference |
ICAP2015, Shanghai, China |
| Series |
International Computational Accelerator Physics Conference (12th) |
| Proceedings |
Link to full ICAP2015 Proccedings |
| Session |
PIC, Poisson and Coupling Impedance Solvers |
| Date |
13-Oct-15 14:00–15:30 |
| Main Classification |
F-1 Parallel Computing and Emerging Technologies |
| Keywords |
simulation, space-charge, distributed, emittance, factory |
| Publisher |
JACoW, Geneva, Switzerland |
| Editors |
Kwok C. Ko (SLAC, Menlo Park, CA, USA); Volker R.W. Schaa (GSI, Darmstadt, Germany); Chuanxiang Tang (Tsinghua University, Beijing, China); Heping Yan (SINAP, Shanghai, China) |
| ISBN |
978-3-95450-136-6 |
| Published |
February 2016 |
| Copyright |
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