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Soft X-ray Spectrum Measurements on the Levitated Dipole Experiment (LDX)

Author: Matthew S Davis
Requested Type: Poster Only
Submitted: 2009-12-04 14:13:21

Co-authors: D. T. Garnier, M. E. Mauel, J. Kesner, J. L. Ellsworth

Contact Info:
Columbia University
500 W. 120th Street
New York, NY   10027

Abstract Text:
The Levitated Dipole Experiment studies plasma confinement in a magnetic dipole field. Measurement of the plasma pressure profile is of particular interest in determining the whether the dipole geometry is suitable for magnetically confined fusion. Interferometer measurements on LDX have shown the density profile to be “peaked” during levitation but while edge probe temperature measurements and measurements of the hot electron temperature have been made the thermal electron temperature profile has not been determined. Here we present measurements of the soft X-ray spectrum (1-10 keV) made with a new Silicon Drift Detector and pulse height analysis system. By comparing levitated shots with similar supported shots, in which the thermal population is largely absent due to end losses, we deduce the thermal electron temperature. This work is supported by DoE grants: DE-FG02-98ER54458/9.

Characterization: A5


Princeton University

Innovative Confinement Concepts Workshop
February 16-19, 2010
Princeton, New Jersey

ICC 2010