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Title: Initial operation of the NSTX-Upgrade real-time velocity diagnostic
Contributors: Podesta, M
Bell, R.E.
U. S. Department of Energy contract number DE-AC02-09CH11466
Keywords: NSTX-U
Charge exchange recombination spectroscopy
Real-time velocity
Plasma rotation control
Issue Date: Nov-2016
Publisher: Princeton Plasma Physics Laboratory, Princeton University
Related Publication: Plasma Phys. Control. Fusion, vol. 58 p. 125016 (December 2016)
Abstract: A real-time velocity (RTV) diagnostic based on active charge-exchange recombination spectroscopy is now operational on the National Spherical Torus Experiment-Upgrade (NSTX-U) spherical torus (Menard et al 2012 Nucl. Fusion 52 083015). The system has been designed to supply plasma velocity data in real time to the NSTX-U plasma control system, as required for the implementation of toroidal rotation control. Measurements are available from four radii at a maximum sampling frequency of 5 kHz. Post-discharge analysis of RTV data provides additional information on ion temperature, toroidal velocity and density of carbon impurities. Examples of physics studies enabled by RTV measurements from initial operations of NSTX-U are discussed.
Referenced By: doi:10.1088/0741-3335/58/12/125016
Appears in Collections:NSTX-U

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