Formation and Stability of Impurity “Snakes” in Tokamak Plasmas
Name
Delgado-2013-Formation and Stability of Impurity.pdf
Size
2.5 MB
Format
Adobe PDF
Checksum (MD5)
db20f366a8ac460fa6c6c3830d40dcef
Author(s)
Delgado-Aparicio, Luis
Sugiyama, Linda E.
Granetz, Robert S.
Gates, D. A.
Rice, John E.
Reinke, Matthew Logan
Bitter, M.
Fredrickson, E.
Greenwald, Martin J.
Hill, K.
Date Issued
February 2013
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Delgado-Aparicio, L. et al. “Formation and Stability of Impurity ‘Snakes’ in Tokamak Plasmas.” Physical Review Letters 110.6 (2013). © 2013 American Physical Society
Version
Final published version
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.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Massachusetts Institute of Technology. Plasma Science and Fusion Center
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1103/PhysRevLett.110.065006
