Multiple-tip liquid-metal field emitter
O. P. KorovinA. F. Ioffe Physicotechnical Institute, Russian Academy of Sciences, St. PetersburgE. O. PopovA. F. Ioffe Physicotechnical Institute, Russian Academy of Sciences, St. PetersburgV. N. ShrednikA. F. Ioffe Physicotechnical Institute, Russian Academy of Sciences, St. PetersburgS. S. KaratetskiiA. F. Ioffe Physicotechnical Institute, Russian Academy of Sciences, St. Petersburg
ABI
Abstract
A stable field emitter with a large tip density (up to 108 cm−2) has been created using track membrane technology. The emitter has been tested in various current collection regimes from a constant current to short pulses of nanosecond duration with a repetition frequency of several kilohertz. The high stability of the emission current at moderate electronic current densities up to 100 mA/cm2 is attributed to the presence of a large number of emitting tips and the dynamic equilibrium between the repulsive forces of the electric field and the forces due to surface tension.
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