TY - JOUR
T1 - Evaluation of heat and particle controllability on the JT-60SA divertor
AU - Kawashima, H.
AU - Hoshino, K.
AU - Shimizu, K.
AU - Takizuka, T.
AU - Ide, S.
AU - Sakurai, S.
AU - Asakura, N.
N1 - Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
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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U2 - 10.1016/j.jnucmat.2010.12.320
DO - 10.1016/j.jnucmat.2010.12.320
M3 - Article
AN - SCOPUS:80054831707
VL - 415
SP - S948-S951
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
SN - 0022-3115
IS - 1 SUPPL
ER -