- Pravděpodobně máte vypnutý JavaScript. Některé funkce portálu nebudou funkční.
Výsledky výzkumu a vývoje
Publication detail
| Original Title: | RF Discharge at Atmospheric Pressure - Diagnostics and Applications |
|---|---|
| Czech Title: | RF Discharge at Atmospheric Pressure - Diagnostics and Applications |
| English Title: | RF Discharge at Atmospheric Pressure - Diagnostics and Applications |
| Author(s): | SLAVÍČEK, P.; KLÍMA, M.; BRABLEC, A.; AUBRECHT, V. |
| Type: | journal article |
| Language: | en |
| Original Abstract: | Thermal radiation plays an important role in many plasma processing devices. The experimental observation of radiation transfer in arc plasmas is very difficult due to extreme experimental conditions. In such case, the mathematical modeling is of great importance. Any quantitative study of the radiative transport of energy requires knowledge of the frequency-dependent absorption properties. Intensive radiation is irradiated from the hot central part of the arc and reabsorbed in cold edge of the plasma. Therefore, besides of continuous and discrete radiation of atoms and atomic ions the influence of molecular species on the absorption properties of the plasma has to be taken into account. In this paper two radiation processes leading to the continuous absorption molecular spectra are studied. Simple approximate formulas for photodissociation and photoionization cross sections of diatomic molecules are presented. Results obtained for selected diatomic molecules are compared with available experimental and other theoretical data from literature. |
| Czech abstract: | Radiační procesy hrají důležitou roli v energetické bilanci termálního plazmatu v elektrickém oblouku. Intenzivní záření je vyzařováno z horké centrální části oblouku a reabsorbováno v chladném okraji plazmatu. Proto se kromě spojitého a diskrétního záření atomů a atomárních iontů projeví i vliv molekulárnách složek. V našich dřívějších pracech jsme se zabývali diskrétním pásovým spektrem dvouatomových molekul. V tomto článku jsou studovány dva radiační procesy vedoucí ke spojitému molekulárnímu spektru. Jsou uvedeny jednoduché aproximační vztahy pro fotodisociační a fotoionizační účinné průřezy dvouatomových molekul. Výsledky získané pro vybrané dvouatomové molekuly jsou srovnány s dostupnými experimentálními a teoretickými daty z literatury. |
| English abstract: | Thermal radiation plays an important role in many plasma processing devices. The experimental observation of radiation transfer in arc plasmas is very difficult due to extreme experimental conditions. In such case, the mathematical modeling is of great importance. Any quantitative study of the radiative transport of energy requires knowledge of the frequency-dependent absorption properties. Intensive radiation is irradiated from the hot central part of the arc and reabsorbed in cold edge of the plasma. Therefore, besides of continuous and discrete radiation of atoms and atomic ions the influence of molecular species on the absorption properties of the plasma has to be taken into account. In this paper two radiation processes leading to the continuous absorption molecular spectra are studied. Simple approximate formulas for photodissociation and photoionization cross sections of diatomic molecules are presented. Results obtained for selected diatomic molecules are compared with available experimental and other theoretical data from literature. |
| Keywords: | radiation of thermal plasma, photodissociation, photoionization, cross sections |
| Released: | 02.12.2008 |
| Publisher: | Association of Czech Chemical Societies |
| Location: | Praha |
| Pages from: | s1338 |
| Pages to: | s1340 |
| Pages count: | 3 |
