Theoretical modeling and physical characteristics of rod-pinch diode

Geng Lidong; Xie Weiping; Yuan Jianqiang; Wang Minhua; Cao Longbo; Fu Jiabin; Zhao Xiaoming; He Yang

doi:10.11884/HPLPB201830.170425

Volume 30 Issue 8

Aug. 2018

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Geng Lidong, Xie Weiping, Yuan Jianqiang, et al. Theoretical modeling and physical characteristics of rod-pinch diode[J]. High Power Laser and Particle Beams, 2018, 30: 085003. doi: 10.11884/HPLPB201830.170425

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Geng Lidong, Xie Weiping, Yuan Jianqiang, et al. Theoretical modeling and physical characteristics of rod-pinch diode[J]. High Power Laser and Particle Beams, 2018, 30: 085003. doi: 10.11884/HPLPB201830.170425

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Theoretical modeling and physical characteristics of rod-pinch diode

doi: 10.11884/HPLPB201830.170425

Key Laboratory of Pulse Power, Institute of Fluid Physics, CAEP, P.O.Box 919-108, Mianyang 621999, China

Received Date: 2017-11-01
Rev Recd Date: 2018-03-25
Publish Date: 2018-08-15

Abstract

Abstract

The rod-pinch diode (RPD) is a cylindrical pinched beam diode being developed as an intense pulsed small diameter bremsstrahlung source for flash X-ray radiography.The studying significance of the physical characteristics lies in optimizing geometry structure of RPD.Using PIC program and numerical simulation, a model of the rod-pinch diode operation based on space limited current at low voltage and self-magnetically limited current at high voltage is researched.Analysis shows that the diode characteristic is determined by space charge limited current at low voltage and self-magnetically limited critical current at high voltage.The simulation result is consistent with reference.Under the special conditions (space charge limited, weakly pinched and self-magnetically limited), the ratios of ion current to electron current are studied.The coefficient for calculating the self-magnetically limited ion to electron current ratio in the self-magnetically limited condition is affected by the electron and ion transit time and free from the high voltage.
- rod-pinch diode,
- flash X-ray radiography source,
- particle-in-cell,
- electron beam,
- pinching characteristics

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References(21)

References

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