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arXiv 0912.4281physics.plasm-ph
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在NSTX中的高通量膨胀偏滤器研究

High flux expansion divertor studies in NSTX

V. A. Soukhanovskii, R. Maingi, R. E. Bell, D. A. Gates, R. Kaita, H. W. Kugel, B. P. LeBlanc, R. Maqueda, J. E. Menard, D. Mueller, S. F. Paul, R. Raman, A. L. Roquemore

摘要:

在国家球形环实验中,利用从22厘米到5-6厘米的稳态X点高度变化进行了高通量膨胀偏滤器研究。小ELM H-模式限制保持在所有的X点高度。偏滤器通量从6扩大到26-28,X点连接长度从5-6 m减少到2 m。偏滤器峰值热通量从7-8 MW/m $^2$降低到1-2 MW/m $^2$。在低X点配置中,外部撞击点几乎脱离。在影响偏滤器中平行热流沉积的因素中,热流膨胀因素占主导地位

英文摘要:

High flux expansion divertor studies have been carried out in the National Spherical Torus Experiment using steady-state X-point height variations from 22 to 5-6 cm. Small-ELM H-mode confinement was maintained at all X-point heights. Divertor flux expansions from 6 to 26-28 were obtained, with associated reduction in X-point connection length from 5-6 m to 2 m. Peak divertor heat flux was reduced from 7-8 MW/m$^2$ to 1-2 MW/m$^2$. In low X-point configuration, outer strike point became nearly detached. Among factors affecting deposition of parallel heat flux in the divertor, the flux expansion factor appeared to be dominant

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