Modeling of the Hα Emission from ADITYA Tokamak Plasmas
| Autor: | Y. Shankara Joisa, Rakesh L. Tanna, Joydeep Ghosh, Nandini Yadava, Ritu Dey, P.K. Atrey, Umeshkumar C. Nagora, Jayesh Raval, Ranjana Manchanda, Aditya Team, Malay Bikas Chowdhuri |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Nuclear and High Energy Physics
Brightness Tokamak Materials science Hydrogen chemistry.chemical_element 01 natural sciences Spectral line 010305 fluids & plasmas law.invention hα spectrum law 0103 physical sciences lcsh:Nuclear and particle physics. Atomic energy. Radioactivity ADITYA tokamak 010306 general physics Neutral particle Spectrometer Plasma Hα spectrum Condensed Matter Physics DEGAS2 Atomic and Molecular Physics and Optics ADITYA chemistry lcsh:QC770-798 Atomic physics |
| Zdroj: | Atoms Volume 7 Issue 4 Atoms, Vol 7, Iss 4, p 95 (2019) |
| ISSN: | 2218-2004 |
| DOI: | 10.3390/atoms7040095 |
| Popis: | The spatial profile of H&alpha spectrum is regularly measured using a high-resolution multi-track spectrometer in ADITYA tokamak to study the neutral particle behavior. The Monte Carlo neutral particle transport code DEGAS2 is used to model the experimental H&alpha spectral emissions. Through the modeling of the spectral line profile of H&alpha it is found that the neutral hydrogen, which is produced from molecular hydrogen and molecular hydrogen ion dissociation processes contributes 56% to the total H&alpha emission, and the atoms which are produced from charge-exchange process have 30% contribution. Furthermore, the experimentally measured spatial profile of chord integrated brightness was modeled for the two plasma discharges having relatively high and low density to understand the neutral particle penetration. The presence of neutrals inside the core region of the ADITYA tokamak is mainly due to the charge-exchange process. Furthermore, it is observed that neutral particle penetration is lower in higher density discharge. |
| Databáze: | OpenAIRE |
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