“…Ferroelectric cathodes have been intensively studied in recent years, 1,2 both to define the emission physics, as well as to examine their applicability as a source for electron tubes along with other applications. 3,4 The ferroelectric cathode has several advantages over the conventional thermionic cathode, such as high current, 5,6 low cost, simple handling, a requirement of modest vacuum conditions, cold operation, and versatile shaping.…”