Journal
JOURNAL OF NUCLEAR MATERIALS
Volume 438, Issue -, Pages S899-S904Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jnucmat.2013.01.195
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Movable liquid lithium limiter (LLL) experiments with both free-surface and capillary-pore system (CPS) configurations were successively utilized on HT-7 in 2009. In the campaign of 2011, experiments with a new lithium (Li) limiter, which used a CPS configuration with a pore size of about 100 mu m and active liquid Li injection from outside of HT-7, were performed. It was found that liquid Li could flow freely driven by only gravity. Confinement of the liquid Li was improved by using the CPS configuration. It was also found that plasma performance was improved due to low recycling and significantly reduced impurity radiation. However, when the CPS LLL is employed as the primary limiter the plasma disruptivity rate increases from similar to 15% to similar to 90% possibly due to Li emission. (C) 2013 Elsevier B. V. All rights reserved.
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