Vacuum arc thruster

A vacuum arc thruster (VAT) is a form of electric spacecraft propulsion. It uses a vacuum arc discharge, across an insulator, between two electrodes to produce thrust.{{cite web |last1=Lunn |first1=Jonathan |title=Vacuum Arc Thruster and Method of Operating the Same |url=https://patentscope.wipo.int/search/en/detail.jsf?docId=WO2016181360 |publisher=WIPO IP Portal |access-date=20 October 2020 |language=en |date=17 November 2016}} A metal plasma is produced from micrometer-size cathodic spots. Thus, whereas the insulator is used as propellant in a pulsed plasma thruster, in a VAT the metallic cathode is consumed as propellant.

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