Enhancement of nonlinear chirped frequency on electron-positron pair production in the potential well

Wang Li; Li Liejuan; Melike Mohamedsedik; Xie Baisong

doi:10.11884/HPLPB202335.220066

Volume 35 Issue 1

Jan. 2023

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Chang Jian, Cai Jiejin. Modeling and analysis situation of fuel rod cladding crevasse in same burnup area[J]. High Power Laser and Particle Beams, 2017, 29: 056002. doi: 10.11884/HPLPB201729.160283

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Wang Li, Li Liejuan, Melike Mohamedsedik, et al. Enhancement of nonlinear chirped frequency on electron-positron pair production in the potential well[J]. High Power Laser and Particle Beams, 2023, 35: 012003. doi: 10.11884/HPLPB202335.220066

Chang Jian, Cai Jiejin. Modeling and analysis situation of fuel rod cladding crevasse in same burnup area[J]. High Power Laser and Particle Beams, 2017, 29: 056002. doi: 10.11884/HPLPB201729.160283

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Enhancement of nonlinear chirped frequency on electron-positron pair production in the potential well

doi: 10.11884/HPLPB202335.220066

Wang Li^{1, 2
,},
Li Liejuan²,
Melike Mohamedsedik²,
Xie Baisong^{1, 2
,
,}

1.
Institute of Radiation Technology, Beijing Academy of Science and Technology, Beijing 100875, China
2.
College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China

Received Date: 2021-03-10
Rev Recd Date: 2022-06-13

Available Online: 2022-06-21

Publish Date: 2023-01-15

Abstract

Abstract

Enhancement of nonlinear chirped frequency on electron-positron pair creation in the potential well is studied by the computational quantum field theory. The density, number and energy spectrum of electrons created under a single oscillating potential well and combined potential wells are investigated. The frequency spectrum and instantaneous bound states are also analyzed. It is found that nonlinear chirp effect is more sensitive to the low frequency region. When appropriate chirp parameters are selected, compared with the fixed frequency, the number of electrons created under combined potential wells can be increased by 2 to 3 times. For a single oscillating potential well, the number can be increased by several orders of magnitude. In the subcritical field at low frequencies, Schwinger mechanism dominates pair creation, and the production is very low. After modulation, the frequency spectrum widens. The high frequency component enhances the multiphoton processes and the dynamical assisted mechanism, while the ultrahigh frequency component inhibits pair creation.

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References

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