Status of radiographic X-ray source driven by 4 MV, 80 kA induction voltage adder

Wei Hao; Yin Jiahui; Zhang Pengfei; Sun Fengju; Qiu Aici; Liang Tianxue; Zeng Jiangtao; Jiang Xiaofeng; Wang Zhiguo; Sun Jiang; Liu Wenyuan; Hu Yixiang

doi:10.11884/HPLPB202032.190331

Volume 32 Issue 2

Dec. 2019

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Wei Hao, Yin Jiahui, Zhang Pengfei, et al. Status of radiographic X-ray source driven by 4 MV, 80 kA induction voltage adder[J]. High Power Laser and Particle Beams, 2020, 32: 025013. doi: 10.11884/HPLPB202032.190331

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Wei Hao, Yin Jiahui, Zhang Pengfei, et al. Status of radiographic X-ray source driven by 4 MV, 80 kA induction voltage adder[J]. High Power Laser and Particle Beams, 2020, 32: 025013. doi: 10.11884/HPLPB202032.190331

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Status of radiographic X-ray source driven by 4 MV, 80 kA induction voltage adder

doi: 10.11884/HPLPB202032.190331

State Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Northwest Institute of Nuclear Technology, Xi'an 710024, China

Received Date: 2019-09-03
Rev Recd Date: 2019-10-30
Publish Date: 2019-12-26

Abstract

Abstract

This paper presents the design details and experiment results of a 4 MV facility developed for flash X-ray radiography in Northwest Institute of Nuclear Technology (NINT). The facility is based on the technology of an induction voltage adder (IVA) driving a rod pinch diode (RPD). The facility mainly consists of the prime power source, induction voltage adder, and RPD. The prime power source consists of two 3.2 MV low-inductance Marx generators and four deionized-water coaxial lines. Each Marx generator charges two 6 Ω, 30 ns pulse forming lines (PFLs) in less than 370 ns. There exist two-stage pulse compressions for each pulseline, providing four forward waves with peak voltages of 1 MV at current of 160 kA with a duration time of 60 ns. Four electrically-triggered SF₆ gas switches serve as energy transfer switches from PFLs to outlines, and then four self-breakdown water switch are used to sharpen the risetime and reduce the prepulse. The IVA consists of four-stage induction cavities stacked in series, each of which almost operates at 1.5 MV voltage. A vacuum insulated transmission line (without magnetic insulation) is used for power addition. The RPD is chosen to create X rays through bremsstrahlung. At present, the IVA could produce a 4.3 MV voltage with a risetime (10%－90%) of 21 ns and a FWHM time of 70 ns. The diode current is about 85 kA, and the FWHM time of X rays is about 55 ns. The delay time from Marx trigger to the X-ray output is about 749 ns, with a standard deviation of about 7 ns. With a 2-mm diameter tungsten rod used, the X-ray dose is about 15.5 rad (LiF) at 1 m straight ahead, and the spot size is about 1.4 mm.
- flash X-ray radiography,
- induction voltage adders,
- rod pinch diode,
- induction cavity,
- pulse forming lines

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References(17)

References

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