Assertion: tube's cathode | /r/CapableOf | emit electron
Facets:
value: significantly
type: DEGREE
value: from the same surface area
type: OTHER
Source sentences:
text: The TWT is an elongated vacuum tube with an electron gun (a heated cathode that emits electrons) at one end.
text: Hot cathodes typically achieve much higher power density than cold cathodes, emitting significantly more electrons from the same surface area.