Electron emission by nanosecond switching in PLZT
作者:
Hartmut Gundel,
期刊:
Integrated Ferroelectrics
(Taylor Available online 1992)
卷期:
Volume 2,
issue 1-4
页码: 207-220
ISSN:1058-4587
年代: 1992
DOI:10.1080/10584589208215744
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Copious electron emission from a PLZT ceramic surface takes place either when the surface is illuminated with laser pulses, or when short high-voltage pulses are applied. In the latter case, charge densities of up to 5 μC/cm2 and current densities of some ten of amperes per square centimetre have been measured. Depending on the position of the material in its phase diagram, different behaviour of the emission has been observed. Consequently the pulsed electron beam varies with respect to its pulse length, its amplitude, and its risetime. Further investigation of these data related to the corresponding material state might be a good diagnostic method, interesting for the switching dynamics in the ns-region. Moreover, a direct application as a pulsed “Ferroelectric Electron Beam Source” is envisaged, as the emission does not rely on vacuum, but also works in low pressure gas or plasma. A maximum repetition frequency of 2 MHz has been established. An improvement of all data of the emitted electron beam seems feasible.
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