Emission, plasma formation, and brightness of a PZT ferroelectric cathode

S. Sampayan, George J Caporaso, D. Trimble, G. Westenskow

Research output: Chapter in Book/Report/Conference proceedingConference contribution

7 Scopus citations

Abstract

We have measured a current emission density of 36 A-cm-2 over an 11.4-cm2-area Lead-Titanate-Zirconate (PZT) ferroelectric cathode with a pulsed anode-cathode (A-K) potential of 50 kV. We have also observed currents above those predicted by classical Child-Langmuir formula for a wide variety of cases. Since a plasma within the A-K gap could also lead to increase current emission we are attempting to measure the properties of the plasma near the cathode surface at emission time. In other measurements, we have observed strong gap currents in the absence of an A-K potential. Further, we continue to make brightness measurements of the emitted beam and observe spatially non-uniform emission and large shot-to-shot variation. Measurements show individual beamlets with a brightness as high 1011 A m-2 rad-2.

Original languageEnglish (US)
Title of host publicationProceedings of the IEEE Particle Accelerator Conference
Place of PublicationPiscataway, NJ, United States
PublisherIEEE
Pages899-901
Number of pages3
Volume2
StatePublished - 1995
Externally publishedYes
EventProceedings of the 1995 16th Particle Accelerator Conference. Part 2 (of 5) - Dallas, TX, USA
Duration: May 1 1995May 5 1995

Other

OtherProceedings of the 1995 16th Particle Accelerator Conference. Part 2 (of 5)
CityDallas, TX, USA
Period5/1/955/5/95

ASJC Scopus subject areas

  • Engineering(all)

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    Sampayan, S., Caporaso, G. J., Trimble, D., & Westenskow, G. (1995). Emission, plasma formation, and brightness of a PZT ferroelectric cathode. In Proceedings of the IEEE Particle Accelerator Conference (Vol. 2, pp. 899-901). IEEE.