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| WEPLT128 |
Charge Particle Source for Industrial and Research Accelerators Operating at the Poor Vacuum Conditions
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2146 |
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- E.O. Popov, A.A. Pashkevich, S.O. Popov, A.V. Vitugov
IOFFE, St. Petersburg
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We investigated the original method of fabrication of the great number of emitting tips by pulling liquid metal through the holes in track membrane under influence of electric field. The track membranes are produced by cyclotron of Physicotechnical Institute. This method enables to fabricate up to 1·108 emitting tips per square cm. Special test facility to investigate emitter parameters operating at different values of background residual gas pressure was designed and developed. The liquid metal multiple tip field emitters possess some unique characteristics which are attractive in accelerators for material irradiation: unlimited life expectancy, large current densities (about 100 mA per sq. cm), practically unlimited surface, stable emission in poor vacuum.
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