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NSTX-U Electron Diagnostic Measurement
Capabilities – January 2015
(black – available
for experiments, blue – under active development)
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Physics
Measurement
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Typical range
and coverage
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Spatial;
Temporal Resolution
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Typical
Precision
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Available
Diagnostic Techniques
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Comment
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Contact
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Electron density line integral
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>2x1011 cm-2
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4 MHz
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2x1011 cm-2
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Tangential interferometry, polarimetry
(FIReTIP)
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FIR laser with retro-reflector in 1
tangential chord with Rtan=0.64 m
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C. Domier – UC Davis, Y. Ren - PPPL
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Electron density profile
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5x1011 - 5x1014 cm-3
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3.0 cm core,
0.9 cm edge, 2 30 Hz lasers
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>3%
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Thomson scattering
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60 Hz Nd:YAG, laser nearly radial on
horizontal midplane, 42 of 48 channels implemented
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B. LeBlanc, A. Diallo, M. Coury – PPPL
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0.02-1.6x1013 cm-3
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1 kHz
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Reflectometry (SOL)
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6 - 36 Ghz swept system, 1 kHz sweep
rate
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C. Lau - ORNL
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Real time
density for density feedback control
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>2x1011 cm-2
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5kHz
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2x1011
cm-2
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Tangential interferometry, polarimetry (FIReTIP)
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FIR laser with retro-reflector in 1
tangential chord with Rtan=0.64 m
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C. Domier – UC Davis, Y. Ren - PPPL
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Electron temperature profile
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0.003 – 5 keV
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3.0 cm core,
0.9 cm edge, 2 30 Hz lasers
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>3%
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Thomson Scattering
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2 - 30 Hz Nd:YAG lasers nearly radial
on horizontal midplane, 42 of 48 possible spatial channels implemented
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B. LeBlanc, A. Diallo, M. Coury – PPPL
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0.1-5 keV
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1 cm, < 10 kHz
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5% (rel)
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Edge (r/a: 0.6-1.1) tangential multi-color SXR arrays
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5 color/ 20 spatial channels, AXUV
diode arrays
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K. Tritz, J. M. Burgos– JHU
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0.1-5 keV
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3 cm, < 10 kHz
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5% (rel)
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Core (r/a: 0-1.1) tangential multi-color SXR arrays
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5 color/ 20 spatial channels, AXUV
diode arrays
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K. Tritz, J. M. Burgos– JHU
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