An improved calculation scheme of electron flow in propagator method for solving the Boltzmann equation
| Autor: | Tsukasa Kobayashi, Hirotake Sugawara, Kei Ikeda |
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| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Japanese Journal of Applied Physics. |
| ISSN: | 1347-4065 0021-4922 |
| Popis: | In order to accurately evaluate the electron acceleration process in the time evolution calculation of electron velocity distribution function (EVDF) based on the Boltzmann equation, an improved scheme blending upwind and central differences is introduced into the propagator method (PM). While the previous PM based on the upwind scheme needs fine cells to obtain an accurate EVDF at low electric fields, the improved PM is robust against coarse cells, which allows the reduction of the cell resolution. Calculations of the EVDF in Ar under RF electric fields demonstrated that the blending scheme can provide satisfactorily accurate results even with cells about tenfold larger than the upwind case at low reduced electric fields below 1 Td, which leads to much shorter computational time because the reduction of number of cells satisfactorily compensates the complexity of the blending scheme. This technique has been built into a new user-friendly PM software named BOSPROM. |
| Databáze: | OpenAIRE |
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