Accounting of the power balance for neutral-beam heated H-mode plasmas in NSTX
Accounting of the power balance for neutral-beam heated H-mode plasmas in NSTX
复制标题
NSTX 中中性束加热 H 型等离子体的功率平衡计算
DOI：
10.1016/j.jnucmat.2004.10.153
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
H. Kugel
中科院分区：
文献类型：
--
作者：
S. Paul;R. Maingi;V. Soukhanovskii;S. Kaye;H. Kugel
研究了NSTX中性束加热等离子体的功率平衡责任。测量了偏滤器撞击板上的热量以及偏滤器和堆芯中的辐射，作为加热功率的函数，在较低的单零点(LSN)和双零点(DN)配置下进行了测量。最高可达70%的净输入功率来自激光快离子放电，其中≈15-20%的功率损失为快离子，≈25-35%入射到偏滤器片上，≈5%辐射到核心，≈5-10%辐射到偏滤器。在DN放电中，快离子损失与LSN放电相当，堆芯辐射功率分数为≈10%，而作为辐射和热流的沉积在下偏滤器中的功率为≈20-25%。假设向上/向下对称，则Dn中的功率责任为≈85%-90%。
Power balance accountability was investigated for neutral beam heated plasmas in NSTX. Measurements of heat to the divertor strike plates and radiation in the divertor and the core were made as a function of heating power in lower single-null (LSN) and double-null (DN) configurations. Up to 70% of the net input power is accounted in the LSN discharges with ≈15–20% of power lost as fast ions, ≈25–35% incident on the divertor plates, ≈5% radiated in the core, and ≈5–10% radiated in the divertor. In DN discharges, the fast ion loss is comparable to LSN discharges, the core radiated power fraction is ≈10%, and the power deposited in the lower divertor as radiation and heat flux is ≈20–25% of the total. Assuming up/down symmetry, the power accountability in DN is ≈85–90%.