| PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES |
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Electron Emission Suppression from Cathode Surfaces of a Rod-Pinch Diode |
GAO Yi1, YIN Jia-Hui2, SUN Jian-Feng2, ZHANG Zhong2, ZHANG Peng-Fei2, SU Zhao-Feng2
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| 1Department of Engineering Physics, Tsinghua University, Beijing 100084 2Northwest Institute of Nuclear Technology, Xi'an 710024 |
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| Cite this article: |
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GAO Yi, YIN Jia-Hui, SUN Jian-Feng et al 2010 Chin. Phys. Lett. 27 055201 |
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Abstract The theory and method of suppressing electron emission from cathode surfaces is introduced, including increasing the emission threshold, reducing the surface electric field and shielding the emitted electrons. The stainless steel-graphite and Teflon-graphite composite cathodes are designed to test the above methods for a rod-pinch diode. The experiments are performed on the inductive voltage adder, and the results indicate that the Teflon-graphite composite cathode is effective in suppressing electron emission from the specified cathode surface, while the stainless steel-graphite composite cathode fails. The reasons are analyzed theoretically.
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| Keywords:
52.25.Tx
52.59.-f
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Received: 05 November 2009
Published: 23 April 2010
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| PACS: |
52.25.Tx
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(Emission, absorption, and scattering of particles)
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52.59.-f
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(Intense particle beams and radiation sources)
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