| Journal: | Brazilian journal of physics |
| Database: | PERIÓDICA |
| System number: | 000403362 |
| ISSN: | 0103-9733 |
| Authors: | Gomes, M.P1 Sismanoglu, B.N1 Amorim, J1 |
| Institutions: | 1Instituto Tecnologico de Aeronautica, Departamento de Fisica, Sao Jose dos Campos, Sao Paulo. Brasil |
| Year: | 2009 |
| Season: | Mar |
| Volumen: | 39 |
| Number: | 1 |
| Pages: | 25-30 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Analítico |
| English abstract | This work is devoted to the study of the electrical characteristics of microhollow cathode discharges (MHCD) at moderate to high pressure in argon and air for different geometries. High-pressure glow discharges can be operated in MHCD devices with µm electrode spacing. Experiments have been performed to determine the so-called Paschen curves, i.e. the dependence of the breakdown voltage on the product electrode gap and gas pressure. Current-voltage characteristic curves were obtained as a function of the pressure and hole diameter. MHCD enables stable direct current discharges that could be ignited for pressures ranging from 12 to 800 Torr, in a very wide range of current densities and electrodes materials. Evidence of electron field emission was observed for several ranges of gap spacing |
| Disciplines: | Física y astronomía |
| Keyword: | Física, Electricidad, Emisión por efecto de campo, Cátodos |
| Keyword: | Physics and astronomy, Physics, Electricity, Electron field emission, Cathodes |
| Full text: | Texto completo (Ver PDF) |
