The Formation of Field-Induced Emission Structures on the Nanostructured Tungsten Surface
| Autor: | P S Mikhailov, I L Muzyukin |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Physics::Instrumentation and Detectors business.industry Astrophysics::High Energy Astrophysical Phenomena chemistry.chemical_element Phosphor Astrophysics::Cosmology and Extragalactic Astrophysics Tungsten Cathode Anode law.invention Field electron emission chemistry law Electrode Nano Optoelectronics Current (fluid) business Astrophysics::Galaxy Astrophysics |
| Zdroj: | 2020 29th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV). |
| DOI: | 10.1109/isdeiv46977.2021.9587218 |
| Popis: | The tungsten surface coated with nano fuzz subjected by an electrical field was investigated. To measure the field emission properties of the non-excited tungsten, surface the extremely low current measurement procedure was developed. Point anode was used, with an electrode gap about 0.4 – 0.8 mm. The slow rising of the electrical field in some cases led to avalanche-like emission current amplification that in turn led to the breakdown. The current amplification waveforms suggest that emission structures are formed on the cathode surface. The field-induced emission structures time was in the range of 10-100Ps. The emission pictures on a phosphor screen and emission current waveforms suggest that during avalanche-like emission current rise several emission structures could be formed. |
| Databáze: | OpenAIRE |
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