1. Stationary density profiles in the Alcator C-mod tokamak
- Author
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Massachusetts Institute of Technology. Department of Nuclear Science and Engineering, Massachusetts Institute of Technology. Plasma Science and Fusion Center, Kesner, Jay, Ernst, Darin R, Hughes Jr, Jerry, Mumgaard, Robert Thomas, Shiraiwa, Shunichi, Whyte, Dennis G, Scott, S., Ernst, Darin R., Massachusetts Institute of Technology. Department of Nuclear Science and Engineering, Massachusetts Institute of Technology. Plasma Science and Fusion Center, Kesner, Jay, Ernst, Darin R, Hughes Jr, Jerry, Mumgaard, Robert Thomas, Shiraiwa, Shunichi, Whyte, Dennis G, Scott, S., and Ernst, Darin R.
- 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., United States. Department of Energy. Office of Fusion Energy Sciences
- Published
- 2018