Microcavity-enhanced electron emission from lead zirconate-titanate cathodes

T. J. Houlahan; C. P. Marsh; S. J. Park; B. C. Masters; J. G. Eden

doi:10.1049/el.2009.0386

Microcavity-enhanced electron emission from lead zirconate-titanate cathodes

T. J. Houlahan, C. P. Marsh, S. J. Park, B. C. Masters, J. G. Eden

Research output: Contribution to journal › Article › peer-review

Abstract

Enhanced electron emission has been observed from lead zirconate-titanate (PZT) surfaces into which arrays of microcavities have been fabricated by nanopowder blasting. Arrays of microcavities, each having an elliptical cross-sectional geometry with major and minor axis lengths of 800 and 600m, respectively, and depths adjustable from 40 to 300m, exhibit a pronounced dependence of the emitter electron current on microcavity depth. For electric field strengths at the emitter surface of ∼5-12V/m, the RMS current density generated by an array of 250m-deep microcavities with a packing density of 214±2cm^-2 ranges from ∼3mAcm^-2 to beyond 8mAcm^-2, or more than a factor of five larger than that produced from a planar PZT surface.

Original language	English (US)
Pages (from-to)	776-778
Number of pages	3
Journal	Electronics Letters
Volume	45
Issue number	15
DOIs	https://doi.org/10.1049/el.2009.0386
State	Published - Aug 18 2009

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Electrical and Electronic Engineering

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10.1049/el.2009.0386

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title = "Microcavity-enhanced electron emission from lead zirconate-titanate cathodes",

abstract = "Enhanced electron emission has been observed from lead zirconate-titanate (PZT) surfaces into which arrays of microcavities have been fabricated by nanopowder blasting. Arrays of microcavities, each having an elliptical cross-sectional geometry with major and minor axis lengths of 800 and 600m, respectively, and depths adjustable from 40 to 300m, exhibit a pronounced dependence of the emitter electron current on microcavity depth. For electric field strengths at the emitter surface of ∼5-12V/m, the RMS current density generated by an array of 250m-deep microcavities with a packing density of 214±2cm-2 ranges from ∼3mAcm-2 to beyond 8mAcm-2, or more than a factor of five larger than that produced from a planar PZT surface.",

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AU - Houlahan, T. J.

AU - Marsh, C. P.

AU - Park, S. J.

AU - Masters, B. C.

AU - Eden, J. G.

PY - 2009/8/18

Y1 - 2009/8/18

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AB - Enhanced electron emission has been observed from lead zirconate-titanate (PZT) surfaces into which arrays of microcavities have been fabricated by nanopowder blasting. Arrays of microcavities, each having an elliptical cross-sectional geometry with major and minor axis lengths of 800 and 600m, respectively, and depths adjustable from 40 to 300m, exhibit a pronounced dependence of the emitter electron current on microcavity depth. For electric field strengths at the emitter surface of ∼5-12V/m, the RMS current density generated by an array of 250m-deep microcavities with a packing density of 214±2cm-2 ranges from ∼3mAcm-2 to beyond 8mAcm-2, or more than a factor of five larger than that produced from a planar PZT surface.

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Microcavity-enhanced electron emission from lead zirconate-titanate cathodes

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