Effect of the tokamak size in edge transport modelling and implications for DEMO

JOURNAL OF NUCLEAR MATERIALS

卷:363

Article; Proceedings Paper

Pacher, H. D. ; Kukushkin, A. S. ; Pacher, G. W. ; Janeschitz, G. ; Coster, D. ; Kotov, V. ; Reiter, D.

关键词: B2/ElRENE;    edge modelling;    edge pedestal;    fusion reactor;    ITER;   

DOI  :  10.1016/j.jnucmat.2007.01.034

来源: Elsevier

【 摘 要 】

The edge plasma of four devices, AUG, JET, ITER and a prototypical DEMO near ignition, is modelled with B2-EIR-ENE with a linear neutral model, carbon impurity, and variable throughput and scrape-off layer power. The scaling from ITER to DEMO is quantified as a power law scaling in device size, and JET and AUG simulations are compared to this scaling. Compared to ITER at the same scrape-off layer power per unit device volume and the same operating point relative to the edge-based density limit, edge helium density and peak power per unit area is found to be similar, and helium influx lower, for DEMO with impurity seeding. With a full neutral model, helium parameters are improved by a factor 3. Results of core modelling show that ignited operation of DEMO is possible with the impurity seeding required to render peak power loads compatible with a helium-cooled divertor. (c) 2007 Elsevier B.V. All rights reserved.

【 授权许可】

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