Experimental and gyrokinetic studies of impurity transport in the core of Alcator C-Mod Plasmas
Name
824171847-MIT.pdf
Description
Full printable version
Size
33.18 MB
Format
Adobe PDF
Checksum (MD5)
5226a7db01e65b6f2509b5522d863c8f
Author(s)
Howard, Nathaniel Thomas
Advisor(s)
Martin Greenwald.
Date Issued
2012
Publisher
Massachusetts Institute of Technology
Abstract
Using a unique set of diagnostics and modeling tools, a comprehensive study of impurity transport was performed on Alcator C-Mod L-mode discharges. A new, multi-pulse laser blow-off system was designed and constructed to introduce trace amounts of non-recycling, non-intrinsic, impurities in the plasma edge. This system was coupled with an x-ray crystal spectrometer, a single chord x-ray/ultraviolet spectrometer, and measurement of the laser blow-off neutral source at the plasma edge to provide full, time-evolving, radial profiles of a single impurity charge state. An iterative X2 minimization scheme was created to infer the experimental impurity transport coefficients and their uncertainty by minimizing the difference in the measured and STRAHL simulated emission. These measurements and data analysis methodology allowed for determination of impurity transport coefficient profiles with realistic errors from 0.0
Description
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Nuclear Science and Engineering, 2012.
Cataloged from PDF version of thesis.
Includes bibliographical references (p. 227-238).
Subjects
Nuclear Science and Engineering.
MIT Department
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
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