Stationary density profiles in the Alcator C-mod tokamak
Author(s)Scott, S.; Kesner, Jay; Ernst, Darin R; Hughes Jr, Jerry; Mumgaard, Robert Thomas; Shiraiwa, Shunichi; Whyte, Dennis G; ... Show more Show less
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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.
DepartmentMassachusetts Institute of Technology. Department of Nuclear Science and Engineering; Massachusetts Institute of Technology. Plasma Science and Fusion Center
Physics of Plasmas
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.
Author's final manuscript