2026-09-19T21:33:19Zhttps://dspace.mit.edu/server/oai/requestoai:dspace.mit.edu:1721.1/612712022-01-13T07:54:41Zcom_1721.1_7582com_1721.1_7581col_1721.1_131024
Earl S. Marmar and John E. Rice.
Walk, John Reel, Jr
Massachusetts Institute of Technology. Dept. of Physics.
Massachusetts Institute of Technology. Department of Physics
2011-02-23T14:39:36Z
2011-02-23T14:39:36Z
2010
2010
http://hdl.handle.net/1721.1/61271
701926486
Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, 2010.
Cataloged from PDF version of thesis.
Includes bibliographical references (p. 63-64).
Using a spatially-resolving x-ray spectrometer system, toroidal impurity rotation in Alcator C-Mod plasmas was measured. The propagation of the rotational velocity from the edge to the core of the plasma column was measured during the L- to H-mode transition. Momentum transport was measured in both Ohmic and ICRF-heated discharges, which produced EDA and ELM-free H-modes. The momentum transport was modeled by a simplified diffusion model, in which momentum diffusivity was substantially higher than neoclassically predicted values.
by John Reel Walk, Jr.
S.B.
64 p.
eng
Massachusetts Institute of Technology
M.I.T. theses are protected by
copyright. They may be viewed from this source for any purpose, but
reproduction or distribution in any format is prohibited without written
permission. See provided URL for inquiries about permission.
http://dspace.mit.edu/handle/1721.1/7582
Physics.
The L- to H-mode transition and momentum confinement in Alcator C-Mod plasmas
Low-energy confinement- to high-energy confinement-mode transition and momentum confinement in Alcator C-Mod plasmas
Thesis
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<Abstract>Using a spatially-resolving x-ray spectrometer system, toroidal impurity rotation in Alcator C-Mod plasmas was measured. The propagation of the rotational velocity from the edge to the core of the plasma column was measured during the L- to H-mode transition. Momentum transport was measured in both Ohmic and ICRF-heated discharges, which produced EDA and ELM-free H-modes. The momentum transport was modeled by a simplified diffusion model, in which momentum diffusivity was substantially higher than neoclassically predicted values.</Abstract>
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