Field electron emission from a nanostructured tungsten surface
نویسندگان
چکیده
Abstract In this paper, the electron emission from a nanostructured tungsten surface was investigated. A method for measuring an extremely low current (10 ?12 – 10 ?14 A) has been tested. It made possible to reduce effect of electric field on sample and minimize probability spontaneous breakdowns. For detailed study fuzz, point anode (diameter 90 ?m) used. Field enhancement factor (? = 2000 3000) effective area were calculated using Fowler–Nordheim plots. The pre-breakdown rise studied. waveforms suggest formation several structures before breakdown.
منابع مشابه
Electron field emission from surface treated tetrahedral amorphous carbon films
The electron field emission properties of tetrahedral amorphous carbon thin films deposited using a filtered cathodic vacuum arc system have improved as a result of surface treatment with H, O, and Ar ions. The limiting factor of the emission process does not appear to be only the front surface of the films. The improvement in the emission after ion beam treatment appears to be independent of t...
متن کاملSurface-plasmon resonance-enhanced multiphoton emission of high-brightness electron beams from a nanostructured copper cathode.
We experimentally investigate surface-plasmon assisted photoemission to enhance the efficiency of metallic photocathodes for high-brightness electron sources. A nanohole array-based copper surface was designed to exhibit a plasmonic response at 800 nm, fabricated using the focused ion beam milling technique, optically characterized and tested as a photocathode in a high power radio frequency ph...
متن کاملLaser-induced ultrafast electron emission from a field emission tip
We show that a fi eld emission tip electron source that is triggered with a femtosecond laser pulse can generate electron pulses shorter than the laser pulse duration (100 fs). The emission process is sensitive to a power law of the laser intensity, which supports an emission mechanism based on multiphoton absorption followed by over-the-barrier emission. Observed continuous transitions betw...
متن کاملElectron Emission Properties of Liquid-Gallium on a Tungsten Field Emitter Tip
For d 1 0 > and 4112 oriented tungsten tips deposited with liquid-gallium, electroll emission patterns and emissiol~ current characteristics were investigated by field emission micrc~scopy. When the tip ~ o l t a g c was applied for the first time after deposition of gallium, stable liquid-gallium cones were forn~ed on the remolded facets for thicknesses d 1.5 5nm and DC electron emission occur...
متن کاملGeneralized Mechanism of Field Emission from Nanostructured Semiconductor Film Cathodes
Considering the effect of both the buffer layer and substrate, a series of ultrathin multilayered structure cathodes (UTMC) is constructed to simulate the field emission (FE) process of nanostructured semiconductor film cathodes (NSFCs). We find a generalized FE mechanism of the NSFCs, in which there are three distinct FE modes with the change of the applied field. Our results clearly show sign...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Physics: Conference Series
سال: 2021
ISSN: ['1742-6588', '1742-6596']
DOI: https://doi.org/10.1088/1742-6596/2064/1/012059