Multi-Fluid Transport Modeling of NSTX Upgrade Standard and Snowflake Divertor Configurations
作者： E. T. Meier , V. A. Soukhanovskii , S. Gerhardt , J. E. Menard , T. D. Rognlien
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摘要: In NSTX Upgrade (NSTX-U), power exhaust is expected to challenge available material and heat removal technologies, which are limited ∼10 MW/m2. Preliminary analysis of flux mitigation strategies, including the snowflake divertor configuration radiative operation, performed with multi-fluid edge transport code, UEDGE. Divertor recycling between 95% 99%, 7 9 MW explored. Compared standard divertor, particular studied here strongly reduces outer target flux, but tends have higher (>10 MW/m2) inner flux. This suggests that optimization should be pursued in future work. Both neon argon impurity seeding scenarios mitigate high fluxes both configurations, can cause collapse core plasma at only 3% concentration. cryopumping also considered, modeling shows ∼50% more particle divertor. (© 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
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