Field emission gun
id:
field-emission-gun-250-7386029
title:
Field emission gun
text:
A field emission gun (FEG) is a type of electron gun in which a sharply pointed Müller-type emitter is held at several kilovolts negative potential relative to a nearby electrode, so that there is sufficient potential gradient at the emitter surface to cause field electron emission. Emitters are either of cold-cathode type, usually made of single crystal tungsten sharpened to a tip radius of about 100 nm, or of the Schottky type, in which thermionic emission is enhanced by barrier lowering in th
brand slug:
wiki
category slug:
encyclopedia
description:
Type of electron gun
original url:
https://en.wikipedia.org/wiki/Field_emission_gun
date created:
date modified:
2024-03-17T20:28:06Z
main entity:
{"identifier":"Q5446996","url":"https://www.wikidata.org/entity/Q5446996"}
image:
{"content_url":"https://upload.wikimedia.org/wikipedia/commons/0/0c/Schottky-Emitter_01.jpg","width":2372,"height":1040}
fields total:
13
integrity:
15