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23 Sep 2002

Volume 81, Issue 13, pp. 2319-2480

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PLASMAS AND ELECTRICAL DISCHARGES

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Perveance of a planar diode with explosive emission finite-diameter cathodes

Yuri M. Saveliev, Wilson Sibbett, and David M. Parkes

Appl. Phys. Lett. 81, 2343 (2002); http://dx.doi.org/10.1063/1.1506015 (3 pages) | Cited 13 times

Online Publication Date: 16 September 2002

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Perveance of a planar diode with explosive emission velvet cathodes of 20–100 mm diameters in a range of diode gaps of 0.5–5 cm is investigated experimentally. An empirical universal curve linking the diode perveance and the cathode radius-to-diode gap ratio is determined thus allowing application of a Child–Langmuir model to diodes of finite dimensions. Comparison of experimental results with two-dimensional (2D) computational models is made and a simple method to translate 2D simulation results to the three-dimensional diode configurations is suggested.

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