Numerical Approach of Interactions of Proton Beams and Dense Plasmas with Quantum-Hydrodynamic/Particle-in-Cell Model

ZHANG Ya (张雅); LI Lian (李莲); JIANG Wei (姜巍); YI Lin (易林)

doi:10.1088/1009-0630/18/7/04

Plasma Science and Technology > 2016 > 18(7): 720-726. > DOI: 10.1088/1009-0630/18/7/04

ZHANG Ya (张雅), LI Lian (李莲), JIANG Wei (姜巍), YI Lin (易林). Numerical Approach of Interactions of Proton Beams and Dense Plasmas with Quantum-Hydrodynamic/Particle-in-Cell Model[J]. Plasma Science and Technology, 2016, 18(7): 720-726. DOI: 10.1088/1009-0630/18/7/04

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Numerical Approach of Interactions of Proton Beams and Dense Plasmas with Quantum-Hydrodynamic/Particle-in-Cell Model

1School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China 2Centre for Mathematical Plasma-Astrophysics, Department of Mathematics, Katholieke Universiteit Leuven, B-3001 Leuven, Belgium

Funds: supported by National Natural Science Foundation of China (Nos. 11405067, 11105057, 11275007)

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Received Date: September 29, 2015

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Abstract

Abstract

A one dimensional quantum-hydrodynamic/particle-in-cell (QHD/PIC) model is used to study the interaction process of an intense proton beam (injection density of 10¹⁷ cm⁻³) with a dense plasma (initial density of ∼10²¹ cm⁻³), with the PIC method for simulating the beam particle dynamics and the QHD model for considering the quantum effects including the quantum statistical and quantum diffraction effects. By means of the QHD theory, the wake electron density and wakefields are calculated, while the proton beam density is calculated by the PIC method and compared to hydrodynamic results to justify that the PIC method is a more suitable way to simulate the beam particle dynamics. The calculation results show that the in¬cident continuous proton beam when propagating in the plasma generates electron perturbations as well as wakefields oscillations with negative valleys and positive peaks where the proton beams are repelled by the positive wakefields and accelerated by the negative wakefields. Moreover, the quantum correction obviously hinders the electron perturbations as well as the wakefields. There¬fore, it is necessary to consider the quantum effects in the interaction of a proton beam with cold dense plasmas, such as in the metal films.
- proton beam,
- particle-in-cell,
- quantum hydrodynamics,
- wake field

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References

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