Stationary density profiles in the Alcator C-mod tokamak
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Author(s)
Scott, S.
Kesner, Jay
Hughes Jr, Jerry
Mumgaard, Robert Thomas
Shiraiwa, Shunichi
Whyte, Dennis G
Ernst, Darin R.
Date Issued
December 2012
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.
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Author's final manuscript
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.
MIT Department
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
Massachusetts Institute of Technology. Plasma Science and Fusion Center
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DOI of Published Version
https://doi.org/10.1063/1.4773215
