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Stationary density profiles in the Alcator C-mod tokamak

Author(s)
Scott, S.; Kesner, Jay; Hughes Jr, Jerry; Mumgaard, Robert Thomas; Shiraiwa, Shunichi; Whyte, Dennis G; Ernst, Darin R.; ... Show more Show less
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Abstract
In the absence of an internal particle source, plasma turbulence will impose an intrinsic relationship between an inwards pinch and an outwards diffusion resulting in a stationary density profile. The Alcator C-mod tokamak utilizes RF heating and current drive so that fueling only occurs in the vicinity of the separatrix. Discharges that transition from L-mode to I-mode are seen to maintain a self-similar stationary density profile as measured by Thomson scattering. For discharges with negative magnetic shear, an observed rise of the safety factor in the vicinity of the magnetic axis appears to be accompanied by a decrease of electron density, qualitatively consistent with the theoretical expectations. © 2012 American Institute of Physics.
Date issued
2012-12
URI
http://hdl.handle.net/1721.1/117087
Department
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering; Massachusetts Institute of Technology. Plasma Science and Fusion Center
Journal
Physics of Plasmas
Publisher
AIP Publishing
Citation
Kesner, J., D. Ernst, J. Hughes, R. Mumgaard, S. Scott, S. Shiraiwa, and D. Whyte. “Stationary Density Profiles in the Alcator C-Mod Tokamak.” Physics of Plasmas 19, no. 12 (December 2012): 122511.
Version: Author's final manuscript
ISSN
1070-664X
1089-7674

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