An overview of lithium experiments on HT-7 and EAST during 2012 |
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| Affiliation: | 1. Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, China;2. Princeton University Plasma Physics Laboratory, Princeton, NJ 08543, USA;3. University of Illinois, Urbana, IL 61801, USA;1. Center for Plasma Material Interactions, University of Illinois, Urbana, Champaign, IL 61801, USA;2. Princeton Plasma Physics Laboratory, Princeton, NJ 08543, USA;1. Princeton Plasma Physics Laboratory, PO Box 451, Princeton, NJ 08543, USA;2. National Institute for Fusion Science, 322-6 Oroshi, Toki, Gifu 509-5292, Japan;3. Center for Plasma-Materials Interactions, University of Illinois, Urbana-Champaign, IL, USA;4. Oak Ridge National Laboratory, PO Box 2008, Oak Ridge, TN 37831, USA;1. Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, China;2. Princeton University, Plasma Physics Laboratory, Princeton, NJ 08543, USA;1. Institute of Physics, University of Latvia, 32 Miera Street, Salaspils LV-2169, Latvia;2. Princeton University, PPPL, MS-27, P.O. Box 451, Princeton, NJ 08543, United States;3. Tokamak Solutions UK Ltd., Culham Science Centre, Abingdon OX14 3DB, United Kingdom |
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| Abstract: | In 2012, lithium coating with an upgraded system on EAST, the first application of lithium granules injection for ELMs pacing on EAST, and the first flowing lithium limiter experiments on HT-7 have successfully been carried out and several new results were obtained. On EAST, it was found that both the Mo first walls and the C divertors were well coated by lithium and the lithium film coverage was increased up to 85%, which greatly contributed to the new achievements of EAST, especially stationary H-mode plasma over 30 s and long pulse plasma over 400 s. And at the same time, ELMs suppression by active lithium conditioning and ELMs pacing using lithium granules injection were demonstrated and reported for the first time on EAST. On HT-7, flowing liquid lithium limiters using the TEMHD concept and using a thin flowing film concept were also initially tested and some references were obtained for the future development. Those experiments show that lithium should be an important material for fusion devices. It could be used for wall conditioning, ELMs mitigation and also provide a self-recovery plasma facing components in future fusion devices. |
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| Keywords: | Lithium Wall conditioning Flow liquid limiter ELMs pacing HT-7 EAST |
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