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- W2469969647 abstract "The output power fluctuations caused by weights of macro particles used in particle-in-cell (PIC) simulations of a backward wave oscillator and a travelling wave tube are statistically analyzed. It is found that the velocities of electrons passed a specific slow-wave structure form a specific electron velocity distribution. The electron velocity distribution obtained in PIC simulation with a relative small weight of macro particles is considered as an initial distribution. By analyzing this initial distribution with a statistical method, the estimations of the output power fluctuations caused by different weights of macro particles are obtained. The statistical method is verified by comparing the estimations with the simulation results. The fluctuations become stronger with increasing weight of macro particles, which can also be determined reversely from estimations of the output power fluctuations. With the weights of macro particles optimized by the statistical method, the output power fluctuations in PIC simulations are relatively small and acceptable." @default.
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- W2469969647 date "2016-07-01" @default.
- W2469969647 modified "2023-10-09" @default.
- W2469969647 title "Output power fluctuations due to different weights of macro particles used in particle-in-cell simulations of Cerenkov devices" @default.
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- W2469969647 doi "https://doi.org/10.1063/1.4958818" @default.
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