Modeling of the Hα Emission from ADITYA Tokamak Plasmas
The spatial profile of Hα 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 Hα spectral emissions. Through the modeling of...
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| Published in: | Atoms Vol. 7; no. 4; p. 95 |
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| Main Authors: | , , , , , , , , , |
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2019
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| Abstract | The spatial profile of Hα 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 Hα spectral emissions. Through the modeling of the spectral line profile of Hα, it is found that the neutral hydrogen, which is produced from molecular hydrogen and molecular hydrogen ion dissociation processes contributes 56% to the total Hα 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. |
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| AbstractList | The spatial profile of Hα 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 Hα spectral emissions. Through the modeling of the spectral line profile of Hα, it is found that the neutral hydrogen, which is produced from molecular hydrogen and molecular hydrogen ion dissociation processes contributes 56% to the total Hα 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. |
| Author | Joisa, Y. Shankara Tanna, Rakesh L. Dey, Ritu Chowdhuri, Malay B. Ghosh, Joydeep Yadava, Nandini Nagora, Umeshkumar C. Manchanda, Ranjana Atrey, Parveen K. Raval, Jayesh V. |
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| CitedBy_id | crossref_primary_10_1016_j_fusengdes_2023_113513 crossref_primary_10_1109_TPS_2022_3152082 crossref_primary_10_1088_1741_4326_ac2cf6 |
| Cites_doi | 10.3390/atoms2020195 10.1088/0029-5515/53/2/023006 10.1063/1.872949 10.1088/1741-4326/aa739c 10.1238/Physica.Topical.096a00005 10.1088/0741-3335/40/6/017 10.1088/0741-3335/51/9/095010 10.1088/0022-3700/8/15/017 10.1088/0029-5515/48/9/095005 10.1063/1.871540 10.1088/0029-5515/29/12/006 10.1063/1.3474949 10.1063/1.874016 10.1002/ctpp.2150340246 10.1088/1741-4326/aa7807 10.1088/1741-4326/ab0f01 10.1088/0029-5515/39/11Y/327 10.13182/FST87-A25010 10.1088/1741-4326/aa6452 10.1007/978-3-642-71935-6 10.1103/PhysRevA.58.2872 |
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| SubjectTerms | aditya tokamak Atoms & subatomic particles Charge exchange Charged particles degas2 Density Discharge H alpha line Hydrogen Hydrogen ions hα spectrum Line spectra Modelling Neutral particles Penetration Plasma Plasmas (physics) Tokamak devices |
| Title | Modeling of the Hα Emission from ADITYA Tokamak Plasmas |
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