Initial operation of the NSTX-Upgrade real-time velocity diagnostic

Podesta, M.; Bell, R.E.

doi:10.11578/1367082

Title: Initial operation of the NSTX-Upgrade real-time velocity diagnostic

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.

Authors:

;

Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)

Publication Date:: 2016-11-01

DOE Contract Number:: AC02-09CH11466

Research Org.:: Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Fusion Energy Sciences (FES)

Subject:: 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; NSTX-U Charge exchange recombination spectroscopy Real-time velocity Plasma rotation control

Keywords:: NSTX-U Charge exchange recombination spectroscopy Real-time velocity Plasma rotation control

OSTI Identifier:: 1367082

DOI:: https://doi.org/10.11578/1367082

Citation Formats


                    Podesta, M., and Bell, R.E. Initial operation of the NSTX-Upgrade real-time velocity diagnostic.  United States: N. p., 2016. 
        Web.  doi:10.11578/1367082.

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                    Podesta, M., & Bell, R.E. Initial operation of the NSTX-Upgrade real-time velocity diagnostic.  United States.  doi:https://doi.org/10.11578/1367082

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                    Podesta, M., and Bell, R.E. 2016.  
"Initial operation of the NSTX-Upgrade real-time velocity diagnostic".  United States.  doi:https://doi.org/10.11578/1367082.  https://www.osti.gov/servlets/purl/1367082. Pub date:Tue Nov 01 00:00:00 EDT 2016

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@article{osti_1367082,

  title        = {Initial operation of the NSTX-Upgrade real-time velocity diagnostic},

  author       = {Podesta, M. and Bell, R.E.},

  abstractNote = {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.},

  doi          = {10.11578/1367082},

  journal      = {},

  number       = ,

  volume       = ,

  place        = {United States},

  year         = {2016},

  month        = {11}

}

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