Overheating of Nanostructured Tendril Bundles due to Thermo-Field Emission
- Resource Type
- Conference
- Authors
- Sinelnikov, D.; Bulgadaryan, D.; Efimov, N.; Hwangbo, D.; Kulagin, V.; Kurnaev, V.; Kajita, S.; Ohno, N.
- Source
- 2020 29th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV) Discharges and Electrical Insulation in Vacuum (ISDEIV), 2020 29th International Symposium on. :77-80 Sep, 2021
- Subject
- Components, Circuits, Devices and Systems
Engineered Materials, Dielectrics and Plasmas
Power, Energy and Industry Applications
Visualization
Radiation effects
Shape
Tungsten
Plasmas
Electric fields
Vacuum arcs
unipolar arcing
thermofield emission
tungsten fuzz
nanostructured tendril bundles
- Language
- ISSN
- 2471-786X
Field emission current accompanied by visualization of emission sites distribution was measured for nanostructured tendril bundles (NTB) on a tungsten surface. These structures are formed in linear simulators of plasma-surface interaction under helium plasma irradiation with Ne or N 2 mixture, and unipolar arcing is often observed for such surfaces. It was shown that field emission current from NTB could be stable for a long period under constant electric field making these structures promising to use as flat cold cathodes. A numerical model was developed for calculating the thermo-field emission current and for checking the possibility of self-heating of the structures depending on their shape. Critical electric field values that lead to self- heating were estimated for different NTB shapes and compared with experimental results.