Effect of Drifts on the Plasma Flow in the Detachment

Hoshino, Kazuo; Hatayama, A.; Kawashima, H.; Asakura, N.; Schneider, Robert; Coster, D.

doi:10.1002/ctpp.200610049

Cited by 6 publications

(13 citation statements)

References 9 publications

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“…4(a) and (c), mainly because of the smaller pressure gradient, the low electron temperature and the resultant small radial electric field due to the detachment as was discussed in Refs. [11,12].…”

Section: Numerical Resultsmentioning

confidence: 98%

“…The remaining boundary conditions at plates, walls and core interface boundary are the same as those in Refs. [11,12]. L $ 0.08 m and jMj $ 0.8 at L $ 7.34 m. The HMAD appears in the both of the inner and the outer divertor regions.…”

Section: Numerical Modelmentioning

confidence: 97%

“…As was discussed in Refs. [6,7,11,12], the HMAD is driven mainly by the pressure gradient force in the parallel direction away from the targets due to the detachment. In Fig.…”

Section: Numerical Modelmentioning

confidence: 99%

“…In addition, effects of E · B and diamagnetic drifts on the HMAD have been studied by using B2.5-Eirene SOLPS 5.0 code [8][9][10] in Refs. [11,12]. These studies mainly focused the attention on the plasma flow only in the divertor region under the detached state.…”

Section: Introductionmentioning

confidence: 99%

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Numerical analysis of the SOL/divertor plasma flow with the effect of drifts

Hoshino¹,

Hatayama²,

Asakura³

et al. 2007

Journal of Nuclear Materials

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Section: Numerical Resultsmentioning

confidence: 98%

Section: Numerical Modelmentioning

confidence: 97%

“…As was discussed in Refs. [6,7,11,12], the HMAD is driven mainly by the pressure gradient force in the parallel direction away from the targets due to the detachment. In Fig.…”

Section: Numerical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Numerical analysis of the SOL/divertor plasma flow with the effect of drifts

Hoshino¹,

Hatayama²,

Asakura³

et al. 2007

Journal of Nuclear Materials

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“…[9,10] by using the SOLPS code. We focus on the detached state where the neutral kinetics has an important role.…”

Section: Introductionmentioning

confidence: 99%

Benchmarking Kinetic and Fluid Neutral Models with Drift Effects

Hoshino

Toma

Hatayama

et al. 2008

Contrib. Plasma Phys.

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A kinetic neutral model and a fluid neutral model have been benchmarked under the detachment condition. The upstream radial profiles of basic plasma and neutral parameters with the fluid neutral model are carefully fitted to that with the kinetic model, while no such an attempt has been made in the divertor region as a first step of the benchmark study with the effects of drifts. At the mid-plane, no significant effects of the drifts on the radial profile of the basic plasma parameters are seen. However, in the divertor region, large differences of the benchmark result are seen even without the effects of drift. Effects of drift tend to enlarge the difference. Therefore, improvement of the fluid neutral model or optimizations of the free parameters are needed to analyze the effects of drifts in the divertor region, especially for the detached state. Otherwise, the kinetic model should be used to analyze the divertor characteristics even without the effects of drifts.

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High‐Z Impurity Transport Code by Monte Carlo Method in a Realistic Tokamak Geometry – IMPGYRO –

Hoshino¹,

Noritake²,

Toma³

et al. 2008

Contrib. Plasma Phys.

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We have developed a three-Dimensional (3-D) Monte Carlo transport code "IMPGYRO" for heavy metal impurities. The code includes most of important processes of heavy metal impurities, such as the Larmor gyration, Coulomb collisions and multi-step ionization/recombination processes. The code outputs the 2-D density profiles of high-Z impurity for a realistic tokamak geometry. In this paper, the IMPGYRO code has been improved to take into account the self-sputtering and the thermal force. The normalized density of impurities in the divertor region for the power detached case is larger than that for the attached case. The balance between the friction force and the thermal force possibly explain the tendency. The IMPGYRO code directly solves the 3-D equation of motion for impurity particles. It is possible to properly calculate the incident angle to the wall for each impurity particle. The incident angle calculated by the IMPGYRO is widely distributed around the incident angle of a magnetic line of force. The sputtering yield greatly depends on the incident angle, especially in the angle range that the incident angle of tungsten is distributed. Therefore, the IMPGYRO code which properly calculates the incident angle is a useful tool to evaluate the angular distribution of incident particles and the resultant amount of the self-sputtered impurity.

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Effect of Drifts on the Plasma Flow in the Detachment

Cited by 6 publications

References 9 publications

Numerical analysis of the SOL/divertor plasma flow with the effect of drifts

Numerical analysis of the SOL/divertor plasma flow with the effect of drifts

Benchmarking Kinetic and Fluid Neutral Models with Drift Effects

High‐Z Impurity Transport Code by Monte Carlo Method in a Realistic Tokamak Geometry – IMPGYRO –

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