Analysis of Neutral Transport in the GAMMA10 Anchor-Cell Using Hα[roman]-Emission Detectors

Higashizono, Y.; Nakashima, Y.; Ohki, T.; Islam, M.K.; Shoji, M.; Kobayashi, S.; Yoshikawa, Masayuki; Kubota, Yoshihiro; Kobayashi, Takayuki; Murakami, Reiichi; Yamada, Michio; Cho, T.

doi:10.13182/fst05-a669

Cited by 5 publications

(2 citation statements)

References 9 publications

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“…This behavior can be interpreted in such a way that the increasing diameter of the plasma cross section along the line of sight of the detector compensates for the decrease of the emissivity with the distance to MLO, since the length of the line of sight at the inner side of the viewing area (z = 660 cm) becomes five times as long as that at the MLO area (z = 710 cm). This result also agrees well with the experimental results [6].…”

Section: Simulation Results and Discussionsupporting

confidence: 93%

Monte Carlo simulation of neutral transport in the non-axisymmetric region of the GAMMA 10 anchor-cell

et al. 2006

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A three-dimensional neutral transport model using the DEGAS version 63 Monte Carlo code is described in order to understand the behavior of neutrals in the non-axisymmetric anchor region of the GAMMA 10 tandem mirror. A precise mesh structure with three-dimensional geometry was built up and the simulation was carried out under a plausible assumption of the particle source on the basis of experimental data. In standard ion-cyclotron-range-of-frequency heated plasmas, detailed measurements of Hα line emission were performed using a 5-ch Hα detector array in the outer-transition region of the east anchor cell and the experimental results were compared with the simulation. The spatial profile of Hα emission predicted from the simulation agreed well with the experimental result and the distinctive behavior of neutrals in this region was clarified.

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Section: Simulation Results and Discussionsupporting

confidence: 93%

Monte Carlo simulation of neutral transport in the non-axisymmetric region of the GAMMA 10 anchor-cell

et al. 2006

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“…Neutral transport can be analyzed in detail by combining experimental results such as H measurements and the results of Monte Carlo simulation. [9][10][11] The Monte-Carlo simulation code DEGAS 12) has been applied to the steady-state plasma in TRIAM-1M. 13) For the purpose of examining the spatial structure of the H profile in the toroidal direction, cylindrical mesh model was newly constructed.…”

Section: Introductionmentioning

confidence: 99%

Neutral Transport Analysis of TRIAM-1M Plasma by Using Monte-Carlo Simulation

Higashizono

Nakashima

Kubota

et al. 2008

jjap

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Neutral transport in the TRIAM-1M tokamak was analyzed using Monte Carlo simulation code (DEGAS). In the cases of lowdensity ($2 Â 10 12 cm À3 ) and high-density ($2 Â 10 13 cm À3 ) plasma discharges, the H intensity is localized around a neutral source, and in the toroidal direction, the 1/e decay lengths of the H intensity in two kinds of discharge differ by a factor of 1.5 to 2. By using a cylindrical mesh model for the DEGAS code, the simulated H intensities properly explained the experimental results. A detailed analysis of the simulation results revealed that the H profile is significantly affected by the geometric structure of the plasma facing component and the parameters of plasma and neutral particles.

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Analysis of Neutral Transport in Fully 3-Dimensional Geometry in the GAMMA 10 Tandem Mirror

Higashizono

Nakashima

Shoji

et al. 2007

Fusion Science and Technology

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Analysis of Neutral Transport in the GAMMA10 Anchor-Cell Using Hα[roman]-Emission Detectors

Cited by 5 publications

References 9 publications

Monte Carlo simulation of neutral transport in the non-axisymmetric region of the GAMMA 10 anchor-cell

Monte Carlo simulation of neutral transport in the non-axisymmetric region of the GAMMA 10 anchor-cell

Neutral Transport Analysis of TRIAM-1M Plasma by Using Monte-Carlo Simulation

Analysis of Neutral Transport in Fully 3-Dimensional Geometry in the GAMMA 10 Tandem Mirror

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