From this cusp field ion emission occurs, by means of the process of field evaporation [ 1, 5 ].
2.
Care is necessary because in some contexts ( e . g . spacecraft engineering ), the name " field emission " is applied to the field-induced emission of ions ( field ion emission ), rather than electrons, and because in some theoretical contexts " field emission " is used as a general name covering both field electron emission and field ion emission.
3.
Care is necessary because in some contexts ( e . g . spacecraft engineering ), the name " field emission " is applied to the field-induced emission of ions ( field ion emission ), rather than electrons, and because in some theoretical contexts " field emission " is used as a general name covering both field electron emission and field ion emission.
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