NSTX-U Energetic Particle Measurement
Capabilities – January 2015
(black – available
for experiments, blue – under active development)
|
Physics
Measurement
|
Typical range
and coverage
|
Spatial;
Temporal Resolution
|
Typical
Precision
|
Available
Diagnostic Techniques
|
Comment
|
Contact
|
Fusion source profile
|
|
|
|
Si diode detectors
|
6-8 channels planned
|
W. Boeglin – Florida Int’l U
|
Neutron flux monitors
|
|
1 ms
|
5% rel.
20% abs.
|
Fission chambers
|
4 U235 detectors with x26
sensitivity ratio
|
D. Darrow - PPPL
|
|
4 microsec
|
<5% rel.
|
Scintillator detectors
|
Plastic scintillators with PM tubes 1-
ZnS; 3 BC400
|
D. Darrow - PPPL
|
Runaway electrons
|
|
10 ms
|
30%
|
Hard X-ray detector
|
At start-up and thermal quench
|
L. Delgado-Aparicio- PPPL
|
Fast Lost Ions
|
|
|
|
FLIP
|
Radial array of Faraday cups
|
D. Darrow - PPPL
|
|
50 kHz
|
2°
3
cm
|
SFLIP
|
Scintillator probe with energy and
pitch angle resolution
|
D. Darrow - PPPL
|
Fast ion dynamics and Fast ion distribution
|
n < 5x1013 cm-3
|
10ms, 5cm, 10keV
|
|
s-FIDA - Spectrometer/CCD (energy resolved signal)
|
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
|
D. Liu, G.Z. Hao, W.W. Heidbrink – UCI
|
20ms, R=100, 120,140cm
|
|
f-FIDA - Band-Pass Filter/PMT
(energy-integrated signal)
|
D. Liu, G.Z. Hao, W.W. Heidbrink – UCI
|
|
10ms in current mode, 5cm, three energy bands [>25, >45,
>65] keV
|
|
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)
|
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
|
D. Liu, G.Z. Hao, W.W. Heidbrink – UCI
|
|
|