Coaxial insulator surface flashover character in different self-magnetic field conditions

Li Feng; Wang Meng; Ren Jing; Kang Junjun; Yang Zun; Xu Le; Xia Minghe

doi:10.3788/HPLPB20132511.3055

Volume 25 Issue 11

Dec. 2013

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Article Navigation > High Power Laser and Particle Beams > 2013 > 25(11): 3055-3059

Wang Ling, Wang Xin, Mu Baozhong, et al. Influence of mounting stress on the surface shape of Schwarzschild objective[J]. High Power Laser and Particle Beams, 2013, 25: 2599-2603. doi: 10.3788/HPLPB20132510.2599

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Li Feng, Wang Meng, Ren Jing, et al. Coaxial insulator surface flashover character in different self-magnetic field conditions[J]. High Power Laser and Particle Beams, 2013, 25: 3055-3059. doi: 10.3788/HPLPB20132511.3055

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Coaxial insulator surface flashover character in different self-magnetic field conditions

doi: 10.3788/HPLPB20132511.3055

1.
Key Laboratory of Pulsed Power,Institute of Fluid Physics,CAEP,P.O.Box 919-108,Mianyang 621900,China

Received Date: 2013-02-28
Rev Recd Date: 2013-08-07
Publish Date: 2013-10-28

Abstract

Abstract

The coaxial self-magnetic field generated by pulsed current of low impedance generator could affect the vacuum insulator surface flashover characteristics because of the magnetic-flashover-inhibition (MFI) effect. In coaxial electrode structure, the ratio of electric field E and magnetic field B is independent of variety of radius, but only depends on circuit parameters. Four coaxial structures are designed with different ratios of E/cB, viz. , 0.041, 0.05, 0.056, and 0.062. Two type experiments, with and without magnetic field, are carried out. The experimental results show that, the surface flashover voltage with appropriate magnetic field orientation to MFI is increased obviously, compared to that without magnetic field. The smaller the ratio of E/cB is, the higher the flashover voltage is. When the ratio of E/cB is 0.041, the flashover voltage can increase to about 1.3 times that in non-magnetic field condition. But flashover voltage will decrease when the orientation of magnetic field is reversed.
- insulator,
- surface flashover,
- self-magnetic flashover inhibition effect,
- circuit current,
- coaxial electrode

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