Abstract
The experimental tube for investigating the emission properties of cathodes working at high temperatures was constructed. Cermet cathodes, in the shape of tablets, were heated by parallel electron beam bombardment. The thermoemission constants of ThO <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf> -Mo cermet cathodes were measured by Richardson's straight line method.
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