Evaluation of heat and particle controllability on the JT-60SA divertor

H. Kawashima; K. Hoshino; K. Shimizu; T. Takizuka; S. Ide; S. Sakurai; N. Asakura

doi:10.1016/j.jnucmat.2010.12.320

Evaluation of heat and particle controllability on the JT-60SA divertor

H. Kawashima, K. Hoshino, K. Shimizu, T. Takizuka, S. Ide, S. Sakurai, N. Asakura

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

The JT-60SA divertor design has been established on the basis of engineering requirements and physics analysis. Heat and particle fluxes under the full input power of 41 MW can give severe heat loads on the divertor targets, while the allowable heat load is limited below 15 MW/m². Dependence of the heat flux mitigation on a D₂ gas-puff is evaluated by SONIC simulations for high density (n_e-ave ∼ 1 × 10 ²⁰ m^-3) high current plasmas. It is found that the peak heat load 10 MW/m² with dense (n_ed > 4 × 10 ²⁰ m^-3) and cold (T_ed, T_id ≤ 1 eV) divertor plasmas are obtained at a moderate gas-puff of Γ _puff = 15 × 10²¹ s^-1. Divertor plasmas are controlled from attached to detached condition using the divertor pump with pumping-speed below 100 m³/s. In full non-inductive current drive plasmas with low density (n_e-ave ∼ 5 × 10¹⁹ m^-3), the reduction of divertor heat load is achieved with the Ar injection.

Original language	English
Pages (from-to)	S948-S951
Journal	Journal of Nuclear Materials
Volume	415
Issue number	1 SUPPL
DOIs	https://doi.org/10.1016/j.jnucmat.2010.12.320
Publication status	Published - 2011 Aug 1
Externally published	Yes

ASJC Scopus subject areas

Nuclear and High Energy Physics
Materials Science(all)
Nuclear Energy and Engineering

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10.1016/j.jnucmat.2010.12.320

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title = "Evaluation of heat and particle controllability on the JT-60SA divertor",

abstract = "The JT-60SA divertor design has been established on the basis of engineering requirements and physics analysis. Heat and particle fluxes under the full input power of 41 MW can give severe heat loads on the divertor targets, while the allowable heat load is limited below 15 MW/m2. Dependence of the heat flux mitigation on a D2 gas-puff is evaluated by SONIC simulations for high density (ne-ave ∼ 1 × 10 20 m-3) high current plasmas. It is found that the peak heat load 10 MW/m2 with dense (ned > 4 × 10 20 m-3) and cold (Ted, Tid ≤ 1 eV) divertor plasmas are obtained at a moderate gas-puff of Γ puff = 15 × 1021 s-1. Divertor plasmas are controlled from attached to detached condition using the divertor pump with pumping-speed below 100 m3/s. In full non-inductive current drive plasmas with low density (ne-ave ∼ 5 × 1019 m-3), the reduction of divertor heat load is achieved with the Ar injection.",

author = "H. Kawashima and K. Hoshino and K. Shimizu and T. Takizuka and S. Ide and S. Sakurai and N. Asakura",

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AU - Kawashima, H.

AU - Hoshino, K.

AU - Shimizu, K.

AU - Takizuka, T.

AU - Ide, S.

AU - Sakurai, S.

AU - Asakura, N.

PY - 2011/8/1

Y1 - 2011/8/1

N2 - The JT-60SA divertor design has been established on the basis of engineering requirements and physics analysis. Heat and particle fluxes under the full input power of 41 MW can give severe heat loads on the divertor targets, while the allowable heat load is limited below 15 MW/m2. Dependence of the heat flux mitigation on a D2 gas-puff is evaluated by SONIC simulations for high density (ne-ave ∼ 1 × 10 20 m-3) high current plasmas. It is found that the peak heat load 10 MW/m2 with dense (ned > 4 × 10 20 m-3) and cold (Ted, Tid ≤ 1 eV) divertor plasmas are obtained at a moderate gas-puff of Γ puff = 15 × 1021 s-1. Divertor plasmas are controlled from attached to detached condition using the divertor pump with pumping-speed below 100 m3/s. In full non-inductive current drive plasmas with low density (ne-ave ∼ 5 × 1019 m-3), the reduction of divertor heat load is achieved with the Ar injection.

AB - The JT-60SA divertor design has been established on the basis of engineering requirements and physics analysis. Heat and particle fluxes under the full input power of 41 MW can give severe heat loads on the divertor targets, while the allowable heat load is limited below 15 MW/m2. Dependence of the heat flux mitigation on a D2 gas-puff is evaluated by SONIC simulations for high density (ne-ave ∼ 1 × 10 20 m-3) high current plasmas. It is found that the peak heat load 10 MW/m2 with dense (ned > 4 × 10 20 m-3) and cold (Ted, Tid ≤ 1 eV) divertor plasmas are obtained at a moderate gas-puff of Γ puff = 15 × 1021 s-1. Divertor plasmas are controlled from attached to detached condition using the divertor pump with pumping-speed below 100 m3/s. In full non-inductive current drive plasmas with low density (ne-ave ∼ 5 × 1019 m-3), the reduction of divertor heat load is achieved with the Ar injection.

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Evaluation of heat and particle controllability on the JT-60SA divertor

Abstract

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