| title: | Electron emission and corona discharge from metal-dielectric systems |
|---|---|
| reg no: | ETF5028 |
| project type: | Estonian Science Foundation research grant |
| subject: |
1.3. Physics |
| status: | completed |
| institution: | Institute of Physics at University of Tartu |
| head of project: | Henn Käämbre |
| duration: | 01.01.2002 - 31.12.2004 |
| description: | The purpose of the work is to elucidate 1) the effect of thin dielectric films (eg TiO2, Ta2O5, HfO2), deposited upon the surface of metallic electrodes, on the photoelectron and field emission from the electrodes; 2) the influence of the electron emission variations, caused by the films, upon the negative corona discharge from the oxide-coated metal electrodes. The expected results are: - description of the effect of the parameters of the dielectric films (thickness, preparation regimes etc) and the morphology of the layer surfaces upon the electron emission from the substrate and/or from the film; - elucidation of the effects of the ambience (vacuum at different pressures, gas environment) on the electron emission; - recording of the dependences of photoemission and photoinduced field emission on the light wavelengths; - elucidation of the joint effect of light and electric field upon the electron emission from the metal-oxide film systems; - finding of the appearing conditions of exoemission from the thin film sandwiches. The anticipated results should present some interest for creators of new cold cathodes for vacuum electronic devices and at the attempts to construct new sensitive (at the ppm concentration level) detectors for trace impurities in the gases. |
| project group | ||||
|---|---|---|---|---|
| no | name | institution | position | |
| 1. | Viktor Bitševin | Univ. of Tartu | Retired | |
| 2. | Henn Käämbre | Institute of Physics, University of Tartu | Retired (from the position of Senior Scientist) | |
| 3. | Matti Laan | Univ. of Tartu | Associate Prof. | |
| 4. | Väino Sammelselg | Univ. of Tartu | Sen. Scientist | |