Experimental study of current loss of a single-hole post-hole convolute on the QG I generator

Hanyu WU (吴撼宇); Zhengzhong ZENG (曾正中); Mengtong QIU (邱孟通); Peitian CONG (丛培天); Jinhai ZHANG (张金海); Xinjun ZHANG (张信军); Ning GUO (郭宁)

doi:10.1088/2058-6272/ab4f89

Plasma Science and Technology > 2020 > 22(1): 15602-015602. > DOI: 10.1088/2058-6272/ab4f89

Hanyu WU (吴撼宇), Zhengzhong ZENG (曾正中), Mengtong QIU (邱孟通), Peitian CONG (丛培天), Jinhai ZHANG (张金海), Xinjun ZHANG (张信军), Ning GUO (郭宁). Experimental study of current loss of a single-hole post-hole convolute on the QG I generator[J]. Plasma Science and Technology, 2020, 22(1): 15602-015602. DOI: 10.1088/2058-6272/ab4f89

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Experimental study of current loss of a single-hole post-hole convolute on the QG I generator

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

Funds: This work is supported by National Natural Science Foundation of China (Nos. 51790521, 11875224) and the Foundation of State Key Laboratory of Intense Pulsed Radiation Simulation and Effect (Nos. SKLIPR1701Z, SKLIPR1901).

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Received Date: June 12, 2019
Revised Date: October 13, 2019
Accepted Date: October 20, 2019

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Abstract

Abstract

The post-hole convolute (PHC), which is used to transport and combine the pulse power flux, is a key component in huge pulsed power generators. Current loss at the PHC is a challenging problem for researchers. To explore a method of reducing the current loss, a single-hole PHC was designed for experiments on the current loss on the Qiang Guang I generator. The experimental results showed that the current loss at the single-hole PHC is related to the distance l between the vicinity of the cathode hole and the surface of the downstream side of the post. Meanwhile, a single-hole PHC with a blob cathode hole transmitted current more effectively than the PHC with a circle cathode hole. The relative current loss at the single-hole PHC with the cathode coated with gold foil was about 30%–50% of that with the cathode coated with nickel and titanium foil. The gap closing speed was also obtained from the current waveforms in the experiments. The speed was 5.74–14.52 cm μs⁻¹ which was different from the classical plasma expansion velocity of 3 cm μs⁻¹.
- plasma,
- post-hole convolute,
- magnetic insulation,
- current loss

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References (31)

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