Electron emission from lead{endash}zirconate{endash}titanate ceramics

Journal Article · Thu Jan 01 04:00:00 EST 1998 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.366783· OSTI ID:565663

Flechtner, D; Golkowski, C; Ivers, J D; Kerslick, G S; Nation, J A ^[1]; Schaechter, L ^[2]

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1. Laboratory of Plasma Studies and School of Electrical Engineering, Cornell University, Ithaca, New York 14853 (United States)
2. Department of Electrical Engineering, Technion---Israel Institute of Technology, Haifa 32000 (Israel)

We report extensive experimental data on electron emission from lead{endash}zirconate{endash}titanate ferroelectric ceramics. A 1{endash}2 MV/m pulse is applied to a gridded ferroelectric cathode and diode currents of up to 120A/cm{sup 2} are measured across an A{endash}K gap of 5{times}10{sup {minus}2}m, with the anode at 35 kV. Both the current and the anode voltage pulse duration may extend to several microseconds. The measurements extend previously reported data by nearly two orders of magnitude in the diode voltage and by a factor of more than 3 in the diode spacing. Two major regimes of operation were identified. In the first {approximately}1{mu}s the ferroelectric cathode controls the electron flow through the diode. Beyond this time plasma effects dominate the current flow. The results are of importance to the development of novel cathodes for high current electron beam generation. {copyright} {ital 1998 American Institute of Physics.}

• OSTI ID: 565663
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 2 Vol. 83; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
66 PHYSICS
CATHODES
CERAMICS
ELECTRON BEAMS
ELECTRON EMISSION
FERROELECTRIC MATERIALS
LEAD COMPOUNDS
PULSES
PZT