Investigation of atomic and molecular processes in H_α emission through modelling of measured H_α emissivity profile using DEGAS2 in the ADITYA tokamak

Dey Ritu; Chowdhuri M. B.; Ghosh Joydeep; Manchanda R.; Yadava Nandini; Ramaiya N.; Banerjee S.; Nagora U. C.; Atrey P. K.; Raval J. V; Joisa Y. Shankar; Tanna R. L.; Stotler D. P.

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Investigation of atomic and molecular processes in H_α emission through modelling of measured H_α emissivity profile using DEGAS2 in the ADITYA tokamak

机译：通过使用DEGAS2在Aditya Tokamak中的测量H_α发射率曲线模拟H_α发射原子和分子过程

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In order to understand the atomic and molecular processes involved in the emission of the hydrogen Balmer alpha (H-alpha) spectral line from tokamak plasmas, the measured radial profile of H-alpha emissivity in ADITYA tokamak discharges has been modeled using the DEGAS2 neutral particle transport code. The radial profile of emissivity has been measured using a 1.0 m multi-track spectrometer and with PMT array based space-resolved visible spectroscopic diagnostics involving interference filters. The radial profile of the neutral hydrogen density has been obtained using the DEGAS2 code by reproducing the experimentally observed H-alpha emissivity profile. It has been found that the neutral density falls by 80-200 times at the plasma center compared to its maximum value at the plasma edge near the limiter (rho = 0.92). Detailed investigation of the contributions of atomic and molecular processes involved in H-alpha emission reveals the significant presence of hydrogen molecules and molecular ions within similar to 4cm of the limiter radius. The contributions from processes involving H-2(+) ions are found to be higher than those from the molecular hydrogen dissociation with H-2(+) dissociative recombination dominating over H-2(+) dissociation at the extreme edge of the plasma.

机译：为了了解来自Tokamak等离子体的氢BA1MALα（H-α）光谱线的发射的原子和分子过程，使用DEGAS2中性颗粒模拟了Aditya Tokamak排放中的H-α发射率的测量径向轮廓运输代码。使用1.0M多轨道光谱仪测量发射率的径向轮廓，并采用涉及干涉滤波器的PMT阵列的空间分辨可见光谱诊断。通过再现实验观察的H-α发射率分布，使用DEGAS2码获得中性氢密度的径向轮廓。已经发现，与限制器附近的等离子体边缘处的等离子体边缘的最大值相比，中性密度在等离子体中心下降了80-200次。（Rho = 0.92）。详细研究H-α发射中所涉及的原子和分子过程的贡献揭示了氢分子的显着存在和在类似于4cm的限制器半径内的氢分子的存在。发现涉及H-2（+）离子的方法的贡献高于来自在血浆的极端边缘的H-2（+）解离的H-2（+）解离重组的分子氢解离的方法。

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来源
《Nuclear fusion》 |2019年第7期|076005.1-076005.11|共11页
作者
Dey Ritu; Chowdhuri M. B.; Ghosh Joydeep; Manchanda R.; Yadava Nandini; Ramaiya N.; Banerjee S.; Nagora U. C.; Atrey P. K.; Raval J. V; Joisa Y. Shankar; Tanna R. L.; Stotler D. P.;
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作者单位

Inst Plasma Res Gandhinagar 382428 India;

Inst Plasma Res Gandhinagar 382428 India;

Inst Plasma Res Gandhinagar 382428 India|Homi Bhaba Natl Inst Mumbai 400094 Maharashtra India;

Inst Plasma Res Gandhinagar 382428 India;

Gujarat Univ Ahmadabad 380009 Gujarat India;

Inst Plasma Res Gandhinagar 382428 India;

Inst Plasma Res Gandhinagar 382428 India|Homi Bhaba Natl Inst Mumbai 400094 Maharashtra India;

Inst Plasma Res Gandhinagar 382428 India|Homi Bhaba Natl Inst Mumbai 400094 Maharashtra India;

Inst Plasma Res Gandhinagar 382428 India;

Inst Plasma Res Gandhinagar 382428 India;

Inst Plasma Res Gandhinagar 382428 India;

Inst Plasma Res Gandhinagar 382428 India;

Princeton Plasma Phys Lab POB 451 Princeton NJ 08543 USA;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
原文格式 PDF
正文语种 eng
中图分类
关键词
ADITYA tokamak; DEGAS2; atomic and molecular processes; H-alpha emissivity;

机译：Aditya Tokamak;Degas2;原子和分子过程;H-alpha发射率;

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专利

1. Investigation of atomic and molecular processes in H_α emission through modelling of measured H_α emissivity profile using DEGAS2 in the ADITYA tokamak [J] . Dey Ritu, Chowdhuri M. B., Ghosh Joydeep, Nuclear fusion . 2019,第7期

机译：通过在ADITYA托卡马克中使用DEGAS2对测得的H_α发射率分布图进行建模来研究H_α发射中的原子和分子过程
2. Temporal Profiling of Electron Temperatures Using the H_α-H_β Line Emission and Triple Langmuir Probe Array in the Pre-lonization Discharge of the MT-I Spherical Tokamak [J] . M. Usman Naseer, F. Deeba, S. I. W. Shah, Fusion Science and Technology . 2020,第8期

机译：使用H_α-H_β线发射和三重LAGGMUIR探针阵列在MT-I球形托卡马克的孤独化排放中的电气温度和三重LANGMUIR探针阵列
3. Evaluation of an Oxygen Transport Coefficient in the Aditya Tokamak Using the Radial Profile of O 4+ Emissivity and the Importance of Atomic Data Used Therein [J] . Malay Bikas Chowdhuri, Joydeep Ghosh, Ritu Dey, Atoms . 2019,第3期

机译：使用O 4+发射率的径向分布评估Aditya Tokamak中的氧传输系数及其中使用原子数据的重要性
4. Emission profile reconstruction of edge plasma of Aditya Tokamak [C] . Makwana, Bhumika, Gupra, International Conference on Communications and Signal Processing . 2013

机译：Aditya Tokamak边缘等离子体的发射轮廓重建
5. The use of satellite-measured aerosol optical depth to constrain biomass burning emissions source strength in a global model GOCART. [D] . Petrenko, Mariya. 2012

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6. Profiling stainless steel welding processes to reduce fume emissions hexavalent chromium emissions and operating costs in the workplace [O] . Michael Keane, Arlen Siert, Samuel Stone, -1

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7. Evaluation of an Oxygen Transport Coefficient in the Aditya Tokamak Using the Radial Profile of O4+ Emissivity and the Importance of Atomic Data Used Therein [O] . 2019

机译：使用O4 +发射率的径向轮廓评估Aditya Tokamak中的氧传输系数及其中使用原子数据的重要性

Investigation of atomic and molecular processes in H_α emission through modelling of measured H_α emissivity profile using DEGAS2 in the ADITYA tokamak

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