An Implicit Monte Carlo Method for Simulation of Impurity Transport in Divertor Plasma
| Autor: | Masatada Ogasawara, Katsuhiro Shimizu, Nobuhiko Hayashi, Akiyoshi Hatayama, Tomonori Takizuka, Akiko Suzuki |
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| Rok vydání: | 1997 |
| Předmět: |
Physics
Numerical Analysis Physics and Astronomy (miscellaneous) Radiative cooling Applied Mathematics Divertor Monte Carlo method Electron Plasma Computer Science Applications Computational Mathematics Physics::Plasma Physics Impurity Modeling and Simulation Ionization Electron temperature Atomic physics |
| Zdroj: | Journal of Computational Physics. 131:193-198 |
| ISSN: | 0021-9991 |
| Popis: | A new “implicit” Monte Carlo (IMC) method has been developed to simulate ionization and recombination processes of impurity ions in divertor plasmas. The IMC method takes into account many ionization and recombination processes during a time step ?t. The time step is not limited by a condition, ?t? ?min(?min; the minimum characteristic time of atomic processes), which is forced to be adopted in conventional Monte Carlo methods. We incorporate this method into a one-dimensional impurity transport model. In this transport calculation, impurity ions are followed with the time step about 10 times larger than that used in conventional methods. The average charge state of impurities, ?Z?, and the radiative cooling rate,L(Te), are calculated at the electron temperatureTein divertor plasmas. These results are compared with thosed obtained from the simple noncoronal model. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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