Title :
An abnormal thermal field emission high brightness and stability point electron source
Author :
Ptitsin, Valery E.
Author_Institution :
Inst. for Anal. Instrum., St. Petersburg, Russia
fDate :
June 30 2014-July 4 2014
Abstract :
A study of the thermal field electron emission from a thin dielectric (ZrO2) layers at the needle - shaped W and Mo microcrystals have shown that the emission process behavior does not agree with the classical theory. The phenomenon studied was called the abnormal thermal field emission (ATFE). It has been found that normalized brightness of the ATFE electron sources are two orders of magnitude higher then well known ZrO/W<;100> Schottky cathodes.
Keywords :
electron field emission; electron sources; molybdenum; tungsten; zirconium compounds; ZrO2-Mo; ZrO2-W; abnormal thermal field emission; needle-shaped Mo microcrystal; needle-shaped W microcrystal; normalized brightness; stability point electron source; thermal field electron emission; thin dielectric zirconia layers; Brightness; Cathodes; Dielectrics; Electron emission; Needles; Physics; Thermal stability;
Conference_Titel :
Vacuum Electron Sources Conference (IVESC), 2014 Tenth International
Conference_Location :
St. Petersburg
Print_ISBN :
978-1-4799-5770-5
DOI :
10.1109/IVESC.2014.6892064
