Edge plasma modeling of limiter surfaces in a tokamak divertor configuration

JOURNAL OF NUCLEAR MATERIALS

卷:266

Article; Proceedings Paper

Rensink, ME ; Rognlien, TD

关键词: 2D fluid code;    2D modeling;    boundary plasma;    code simulation;    computer simulation;    divertor;    divertor modeling;    divertor plasma;    edge modeling;    edge plasma;    fluid model;    heat deposition;    heat flux;    heat load;    ITER;    limiter;    magnetic surface;    non-orthogonal grid;    numerical simulation;    particle diffusivity;    particle flow;    particle flux;    particle recycling;    plasma edge;    plasma edge physics;    plasma modeling;    power deposition;    power flux;    pumping;   

DOI  :  10.1016/S0022-3115(98)00859-9

来源: Elsevier

【 摘 要 】

We describe a 2-D model for edge plasmas with localized limiter surfaces penetrating the scrape-off layer. The model is used to simulate an idealized ITER startup configuration with variations in the limiter penetration depth and surface shape. The results show that the distribution of the total heat load between divertor plates and outer midplane limiter surfaces can be controlled by the penetration depth of the limiter. The limiter surface can be shaped to reduce the peak heat flux without significantly changing the total heat loads. The tentative conclusion is that ITER startup on an outer midplane limiter is reasonable because the total and peak heat loads can be controlled by the limiter positioning and shape. (C) 1999 Elsevier Science B.V. All rights reserved.

【 授权许可】

Free