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Reduction or elimination of edge localized modes (ELMs) while maintaining high confinement is essential for future fusion devices, e.g. the ITER. An ELM-free regime was recently obtained in the National Spherical Torus Experiment, following lithium (li) evaporation onto the plasma facing components. Edge stability calculations indicate that the pre-li discharges were unstable to low-n peeling/ballooning modes, while broader pressure profiles stabilized the post-li discharges. Normalized energy confinement increased by 50% post-li, with no sign of ELMs up to the global stability limit.
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| Authors: |
Maingi, Rajesh [ORNL];
Osborne, T. [General Atomics, San Diego];
LeBlanc, B [Princeton Plasma Physics Laboratory (PPPL)];
Bell, R. E. [Princeton Plasma Physics Laboratory (PPPL)];
Manickam, J. [Princeton Plasma Physics Laboratory (PPPL)];
Snyder, P. [General Atomics, San Diego];
Menard, J. [Princeton Plasma Physics Laboratory (PPPL)];
Mansfield, D.K. [Princeton Plasma Physics Laboratory (PPPL)];
Kugel, H. [Princeton Plasma Physics Laboratory (PPPL)];
Kaita, R. [Princeton Plasma Physics Laboratory (PPPL)];
Gerhardt, S.P. [Princeton Plasma Physics Laboratory (PPPL)];
Sabbagh, S. A. [Columbia University];
Kelly, F.A. [Princeton Plasma Physics Laboratory (PPPL)]
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| Publication Date: | 2009 Jan 01 |
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| OSTI Identifier: | 965864 |
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| DOE Contract Number: | DE-AC05-00OR22725 |
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| Resource Type: | Journal Article |
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| Resource Relation: | Journal Name: Physical Review Letters; Journal Volume: 103 |
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| Research Org: | Oak Ridge National Laboratory (ORNL) |
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| Sponsoring Org: | SC USDOE - Office of Science (SC) |
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| Country of Publication: | United States |
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| Language: | English |
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| Format: | Size: 1-10 |
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| Other Number(s): | Other: AT5015010; ERAT308; TRN: US0903855 |
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| Subject: | 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; COATINGS; EDGE LOCALIZED MODES; MITIGATION; LITHIUM; NSTX DEVICE; THERMONUCLEAR REACTOR WALLS; STABILITY |
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| Update Date: | 2013 Jun 06 |
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