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Maingi R, Kaye SM, Skinner CH, et al. Continuous improvement of H-mode discharge performance with progressively increasing lithium coatings in the National Spherical Torus Experiment. Phys Rev Lett. 2011;107(14):145004doi: 10.1103/PhysRevLett.107.145004.
Maingi, R., Kaye, S. M., Skinner, C. H., Boyle, D. P., Canik, J. M., Bell, M. G., Bell, R. E., Gray, T. K., Jaworski, M. A., Kaita, R., Kugel, H. W., LeBlanc, B. P., Mansfield, D. K., Osborne, T. H., Sabbagh, S. A., & Soukhanovskii, V. A. (2011). Continuous improvement of H-mode discharge performance with progressively increasing lithium coatings in the National Spherical Torus Experiment. Physical review letters, 107(14), 145004. https://doi.org/10.1103/PhysRevLett.107.145004
Maingi, R, et al. "Continuous improvement of H-mode discharge performance with progressively increasing lithium coatings in the National Spherical Torus Experiment." Physical review letters vol. 107,14 (2011): 145004. doi: https://doi.org/10.1103/PhysRevLett.107.145004
Maingi R, Kaye SM, Skinner CH, Boyle DP, Canik JM, Bell MG, Bell RE, Gray TK, Jaworski MA, Kaita R, Kugel HW, LeBlanc BP, Mansfield DK, Osborne TH, Sabbagh SA, Soukhanovskii VA. Continuous improvement of H-mode discharge performance with progressively increasing lithium coatings in the National Spherical Torus Experiment. Phys Rev Lett. 2011 Sep 30;107(14):145004. doi: 10.1103/PhysRevLett.107.145004. Epub 2011 Sep 29. PMID: 22107204.
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Phys Rev Lett. 2011 Sep 30;107(14):145004. doi: 10.1103/PhysRevLett.107.145004. Epub 2011 Sep 29.

Continuous improvement of H-mode discharge performance with progressively increasing lithium coatings in the National Spherical Torus Experiment.

Physical review letters

R Maingi, S M Kaye, C H Skinner, D P Boyle, J M Canik, M G Bell, R E Bell, T K Gray, M A Jaworski, R Kaita, H W Kugel, B P LeBlanc, D K Mansfield, T H Osborne, S A Sabbagh, V A Soukhanovskii

Affiliations

  1. Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.

PMID: 22107204 DOI: 10.1103/PhysRevLett.107.145004

Abstract

Lithium wall coatings have been shown to reduce recycling, improve energy confinement, and suppress edge localized modes in the National Spherical Torus Experiment. Here, we show that these effects depend continuously on the amount of predischarge lithium evaporation. We observed a nearly monotonic reduction in recycling, decrease in electron transport, and modification of the edge profiles and stability with increasing lithium. These correlations challenge basic expectations, given that even the smallest coatings exceeded that needed for a nominal thickness of the order of the implantation range.

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