Abstract
The Monte Carlo simulation of particle transport does not solve an explicit equation, but rather obtains answers by sampling individual particles and recording some aspects of their average behavior. For the incident energy of particles below 1.5 MeV, the Compton scattering process is sampled exactly by Kahn's method. This paper focuses on accelerating sampling the Compton scattering of Kahn's method on GPU. The sampling procedures are distributed to the massive thread level parallelism of GPU architecture with CUDA programming model. Experimental results show that the speedup of the GPU implementation on one NVIDIA M2050 chip ranges from 3.10 compared with one Intel Xeon X5670 chip to 8.51 compared with one Intel Xeon X5355 chip with full double precision floating point operations.
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