Emission Characteristics for <100>, <110> and <111> LaB_6 Cathodes

概要

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Characteristics for electron beam emitted from <100>, <110> and <111> axial orientation LaB_6 cathodes after 100 hours of aging were studied. It is inferred from the emission pattern and cross-over image that electrons are emitted to a great extent from the top surface for the <100> cathode and mainly from the conical surface for <110> and <111> cathodes at a bias voltage that gives maximum brightness. This inference clearly explains the electron beam characteristics such as brightness, emission angle and total beam current.
社団法人応用物理学会の論文
1980-09-05