DC vacuum breakdown in an external magnetic field

The subject of the present theoretical and experimental investigations is the effect of the external magnetic field induction on dark current and a possibility of breakdown. The generalization of the Fowler–Nordheim equation makes it possible to take into account the influence of a magnetic field pa...

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Bibliographic Details
Published inNuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Vol. 908; pp. 318 - 324
Main Authors Lebedynskyi, S., Karpenko, O., Kholodov, R., Baturin, V., Profatilova, Ia, Shipman, N., Wuensch, W.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 11.11.2018
Subjects
Breakdown rate
Field emission
Magnetic field
Vacuum breakdown
Breakdown rate
Field emission
Magnetic field
Vacuum breakdown
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ISSN0168-9002
1872-9576
1872-9576
DOI10.1016/j.nima.2018.08.061

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Summary:The subject of the present theoretical and experimental investigations is the effect of the external magnetic field induction on dark current and a possibility of breakdown. The generalization of the Fowler–Nordheim equation makes it possible to take into account the influence of a magnetic field parallel to the cathode surface on the field emission current. The reduction in the breakdown voltage due to the increment in electron-impact ionization was theoretical predicted. Experimentally shown that the presence of a magnetic field about a tenth as a large as the cutoff magnetic field (Hull, 1921) reduces the breakdown voltage by 10% to 20% for practically all cathodes no matter what their surface treatment.
ISSN:0168-9002
1872-9576
1872-9576
DOI:10.1016/j.nima.2018.08.061