Beam electron energy distribution at a volume nanosecond discharge in atmospheric-pressure air
| Autor: | Victor F. Tarasenko, S. V. Shlyakhtun, V. K. Petin, Igor D. Kostyrya |
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| Rok vydání: | 2006 |
| Předmět: | |
| Zdroj: | Technical Physics. 51:1576-1585 |
| ISSN: | 1090-6525 1063-7842 |
| Popis: | The energy distributions of beam electrons and x-ray photons in a volume nanosecond discharge on atmospheric-pressure air are studied. Several groups of elevated-energy electrons are found. It is shown that electrons with an energy from several tens to several hundreds of kiloelectronvolts (which is lower than a maximal voltage across the gap) make a major contribution to the beam current measured behind thin foils. It is corroborated that fast electrons (with an energy from several kiloelectronvolts to several tens of kiloelectron-volts) arise 100–150 ps before the basic peak of the beam current, elongating the current pulse and significantly increasing its amplitude. The contribution from electrons with an anomalously high energy (exceeding a maximal voltage across the gap) to the beam current is shown to be insignificant (less than 5%). The x-ray spectra in gas-filled diodes of different design are studied. Techniques of measuring the subnanosecond electron beam current and mechanisms generating fast and runaway electrons in volume high-pressure gas discharges are analyzed. |
| Databáze: | OpenAIRE |
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