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NSTX-U Energetic Particle 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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Fusion source profile
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Si diode detectors
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6-8 channels planned
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W. Boeglin – Florida Int’l U
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Neutron flux monitors
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1 ms
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5% rel.
20% abs.
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Fission chambers
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4 U235 detectors with x26
sensitivity ratio
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D. Darrow - PPPL
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4 microsec
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<5% rel.
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Scintillator detectors
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Plastic scintillators with PM tubes 1-
ZnS; 3 BC400
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D. Darrow - PPPL
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Runaway electrons
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10 ms
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30%
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Hard X-ray detector
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At start-up and thermal quench
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L. Delgado-Aparicio- PPPL
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Fast Lost Ions
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FLIP
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Radial array of Faraday cups
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D. Darrow - PPPL
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50 kHz
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2°
3
cm
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SFLIP
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Scintillator probe with energy and
pitch angle resolution
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D. Darrow - PPPL
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Fast ion dynamics and Fast ion distribution
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n < 5x1013 cm-3
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10ms, 5cm, 10keV
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s-FIDA - Spectrometer/CCD (energy resolved signal)
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Vertical views from Bay A/B.
Tangential views from Bay L/F. Based on active charge-exchange spectroscopy:
requires NB injection; MPTS and CHERS data needed for analysis
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D. Liu, G.Z. Hao, W.W. Heidbrink – UCI
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20ms, R=100, 120,140cm
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f-FIDA - Band-Pass Filter/PMT
(energy-integrated signal)
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D. Liu, G.Z. Hao, W.W. Heidbrink – UCI
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10ms in current mode, 5cm, three energy bands [>25, >45,
>65] keV
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Solid
state NPA system
(t-SSNPA:
subsystem at Bay I for active tangential views,
r-SSNPA: subsystem at Bay L midplane for active radial views
p-SSNPA: subsystem at Bay B for
background passive signals)
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15 tangential views with Rmaj
between 90-130 cm; 15
radial views with Rmaj between 120-145 cm; 15 passive views; Si- diode arrays in current mode, 500kHz sample rate,
~100kHz bandwidth ; requires NB injection; MPTS and CHERS data needed for
analysis
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D. Liu, G.Z. Hao, W.W. Heidbrink – UCI
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