0386389 - ÚPT 2013 RIV CZ eng C - Konferenční příspěvek (zahraniční konf.)
Matějka, František - Horáček, Miroslav - Kolařík, Vladimír - Matějka, Milan
Thermal-field electron emission W(100)/ZrO cathode: facets versus edges.
Proceedings of the 13th International Seminar on Recent Trends in Charged Particle Optics and Surface Physics Instrumentation. Brno: Institute of Scientific Instruments AS CR, v.v.i, 2012 - (Mika, F.), s. 27-28. ISBN 978-80-87441-07-7.
[International Seminar on Recent Trends in Charged Particle Optics and Surface Physics Instrumentation /13./. Skalský dvůr (CZ), 25.06.2012-29.06.2012]
Grant CEP: GA MŠMT ED0017/01/01
Institucionální podpora: RVO:68081731
Klíčová slova: electron emission * tungsten crystallography * thermal field cathode
Kód oboru RIV: JA - Elektronika a optoelektronika, elektrotechnika

The tungsten cathode in the thermal-field emission (TFE) regime can achieve significantly higher angular current density in comparison with the Schottky cathode. The Schottky emission regime is located between the thermal emission regime and the cold field emission regime. The typical operation electric field is 0,1 - I V/nm and tip radius varies from 0.3 to 1.0 im . The thermal-field regime is located between the Schottky regime and the cold field emission regime. In the cold field emission regime the electron tunnelling is a dominant mechanism due to the electric field higher than 1 V/nm. The TFE is a combination of the field supported thermal emission and the field emission under the higher electric field. The radius of the thermal-field emitter should be lower in comparison with the Schottky emitter.
Trvalý link: http://hdl.handle.net/11104/0215701