کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5427439 | 1508628 | 2017 | 17 صفحه PDF | دانلود رایگان |
- Relativistic distorted wave theory is used to calculate the electron-impact excitation of cesium.
- Electron impact excitation rate-coefficients are calculated as a function of electron temperature.
- A collisional radiative (CR) model has been developed using the obtained cross-sections and the characterization of the hydrogen-cesium plasma has been done.
Electron impact excitation cross-sections and rate coefficients have been calculated using fully relativistic distorted wave theory for several fine-structure transitions from the ground as well as excited states of cesium atom in the wide range of incident electron energy. These processes play dominant role in low pressure hydrogen-cesium plasma, which is relevant to the negative ion based neutral beam injectors for the ITER project. As an application, the calculated detailed cross-sections are used to construct a reliable collisional radiative (CR) model to characterize the hydrogen-cesium plasma. Other processes such as radiative population transfer, electron impact ionization and mutual neutralization of Cs+ ion with negative hydrogen ion along with their reverse processes are also taken into account. The calculated cross-sections and the extracted plasma parameters from the present model are compared with the available experimental and theoretical results.
Journal: Journal of Quantitative Spectroscopy and Radiative Transfer - Volume 187, January 2017, Pages 426-442