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NSTX-U Ion Diagnostics 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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Ion temperature profile
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0.02 – 5.0 keV
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3.0 cm core,
0.5 cm edge, 10 ms
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≥ 2%
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Toroidal CHERS
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51 channels system using C VI with
heating beam, dedicated background view
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R. Bell, M.Podestà – PPPL
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3.0 cm edge only, 10 ms
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≥ 2%
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Edge Doppler spectroscopy
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7 channels from tangential view and 6
channels from vertical view of outer midplane edge. Uses intrinsic C III and He II.
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R. Bell, M.Podestà – PPPL
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Plasma rotation profile
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-100 km/s to +300 km/s
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3.0 cm core,
0.5 cm edge, 10 ms
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≥ 2%
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Toroidal CHERS
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See above
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R. Bell, M.Podestà – PPPL
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~ 3.0 cm edge only, 10 ms
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≥ 2%
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Edge Doppler spectroscopy
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See above
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R. Bell, M.Podestà – PPPL
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1.6 cm core,
0.6 cm edge, 10 ms
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Poloidal
CHERS
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Up and down views of heating beam and
dedicated background views, 75 active channels using C VI with heating
beam.
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R. Bell, M.Podestà – PPPL
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-100 km/s to +300 km/s
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4 radial channels; up to 5kHz sampling rate
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Real-time
toroidal CHERS
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4 channels measuring C VI, active and passive
(background) views, fast acquisition and analysis for real-time velocity data
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M.Podestà, R. Bell – PPPL
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ExB flow Core plasma
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5MHz BW
Dr ~ 1cm
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Quadrature Doppler Backscattering (DBS)
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1 Channel, 96 GHz (2015)
4 Channels (2016)
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S. Kubota - UCLA
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Measures plasma emission up to 40 GHz with sub-millisecond time
resolution.
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Synthetic Aperture Microwave Imaging (SAMI)
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Compact array of microwave receiving antennas. Two antennas can
be configured to launch microwaves for imaging reflectometry.
Measures EBW emission as a function of poloidal and toroidal
angle, allowing high radial resolution measurements of edge magnetic field
pitch. Also can be configured for imaging relectometry to measure edge plasma
flows.
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G. Taylor – PPPL
R. Vann – University of York, UK
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Profile of the radial Electric field
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5 cm core, 2 cm edge, 10 ms
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MSE/CIF and MSE/LIF
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See above; requires heating source A
and DNB
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F. Levinton, H. Yuh, Y. Sechrest - Nova Photonics
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3.0 cm core,
0.5 cm edge, 10 ms
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Toroidal and poloidal CHERS
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See above; requires heating beam
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R. Bell, M.Podestà – PPPL
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3.0 cm, 10 ms
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Edge Doppler spectroscopy
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May need helium
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R. Bell, M.Podestà – PPPL
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Radiation profile
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2-3 cm, 0.2 ms
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Toroidal bolometer array
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Tangential view, 40 channels (AXUV
diode arrays)
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L. Delgado-Aparicio - PPPL
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Lower divertor area
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1-2
cm, 10-20 kHz
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Divertor
radiometer (bolometer) array, can be used with Ly-alpha filter
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Vertical view, 20 channel AXUV diode array
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V. Soukhanovskii - LLNL
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Zeff
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line integral
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10% abs.
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Visible continuum sensor
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Single filterscope chord, RTAN~60
cm
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C. Skinner - PPPL
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3.0 cm core,
0.5 cm edge, 10 ms
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≥ 5% in (Zeff-1)
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Toroidal CHERS
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See above, assumes C only impurity
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R. Bell, M.Podestà – PPPL
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Impurity concentrations
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C+5 conc.
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3.0 cm core,
1.0 cm edge, 10 ms
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20% abs.
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Toroidal CHERS
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See above
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R. Bell, M.Podestà – PPPL
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H/D ratio, survey, impurity studies
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Integral;
10 ms
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5%
(rel)
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Ultraviolet-visible
survey spectrometer VIPS-2
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3 (10) sightlines coupled via
fiber to 0.5 M Czerny-Turner; 350-1100 nm, CCD detector.
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V.
Soukhanovskii - LLNL
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Z≥3 ions
(Li, B, C, O, Cu, Ne, Ar, Fe, Kr, Mo)
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5
cm; 5 ms for impurities
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15%
abs
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Filtered
poloidal soft x-ray arrays
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2 horizontal arrays (32 ch); discrete AXUV diode
arrays
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K. Tritz, J. M. Burgos–
JHU
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1
cm, < 10 kHz
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5%
(rel)
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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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r/a~0.08, 10 ms
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15%
abs
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TGI
spectrometer
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12 chord transmission grating imaging
spectrometer; 10Å – 300Å CCD camera
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K. Tritz, J. M. Burgos
– JHU
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Integral; 12 ms
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5%
(rel)
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EUV
spectrometer (XEUS)
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Flat field grazing incidence spectrometer covering
5-60 Å
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P. Beiersdorfer-LLNL
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Integral; 12 ms
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5%
(rel)
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EUV
spectrometer (LoWEUS)
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Flat field grazing incidence spectrometer covering
220-400 Å
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P. Beiersdorfer-LLNL
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Integral; 12 ms
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5%
(rel)
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EUV
spectrometer (MonaLisa)
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Flat field grazing incidence spectrometer covering
60-220 Å
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P. Beiersdorfer-LLNL
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