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Delgado-Aparicio L, Sugiyama L, Granetz R, et al. Formation and stability of impurity "snakes" in tokamak plasmas. Phys Rev Lett. 2013;110(6):065006doi: 10.1103/PhysRevLett.110.065006.
Delgado-Aparicio, L., Sugiyama, L., Granetz, R., Gates, D. A., Rice, J. E., Reinke, M. L., Bitter, M., Fredrickson, E., Gao, C., Greenwald, M., Hill, K., Hubbard, A., Hughes, J. W., Marmar, E., Pablant, N., Podpaly, Y., Scott, S., Wilson, R., Wolfe, S., & Wukitch, S. (2013). Formation and stability of impurity "snakes" in tokamak plasmas. Physical review letters, 110(6), 065006. https://doi.org/10.1103/PhysRevLett.110.065006
Delgado-Aparicio, L, et al. "Formation and stability of impurity "snakes" in tokamak plasmas." Physical review letters vol. 110,6 (2013): 065006. doi: https://doi.org/10.1103/PhysRevLett.110.065006
Delgado-Aparicio L, Sugiyama L, Granetz R, Gates DA, Rice JE, Reinke ML, Bitter M, Fredrickson E, Gao C, Greenwald M, Hill K, Hubbard A, Hughes JW, Marmar E, Pablant N, Podpaly Y, Scott S, Wilson R, Wolfe S, Wukitch S. Formation and stability of impurity "snakes" in tokamak plasmas. Phys Rev Lett. 2013 Feb 08;110(6):065006. doi: 10.1103/PhysRevLett.110.065006. Epub 2013 Feb 08. PMID: 23432265.
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Phys Rev Lett. 2013 Feb 08;110(6):065006. doi: 10.1103/PhysRevLett.110.065006. Epub 2013 Feb 08.

Formation and stability of impurity "snakes" in tokamak plasmas.

Physical review letters

L Delgado-Aparicio, L Sugiyama, R Granetz, D A Gates, J E Rice, M L Reinke, M Bitter, E Fredrickson, C Gao, M Greenwald, K Hill, A Hubbard, J W Hughes, E Marmar, N Pablant, Y Podpaly, S Scott, R Wilson, S Wolfe, S Wukitch

Affiliations

  1. PPPL, Princeton, New Jersey 08540, USA.

PMID: 23432265 DOI: 10.1103/PhysRevLett.110.065006

Abstract

New observations of the formation and dynamics of long-lived impurity-induced helical "snake" modes in tokamak plasmas have recently been carried out on Alcator C-Mod. The snakes form as an asymmetry in the impurity ion density that undergoes a seamless transition from a small helically displaced density to a large crescent-shaped helical structure inside q<1, with a regularly sawtoothing core. The observations show that the conditions for the formation and persistence of a snake cannot be explained by plasma pressure alone. Instead, many features arise naturally from nonlinear interactions in a 3D MHD model that separately evolves the plasma density and temperature.

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