applications of adas to iter diagnostics
DESCRIPTION
Applications of ADAS to ITER Diagnostics. Robin Barnsley and ITER Diagnostics Division Martin O’Mullane, Strathclyde University ADAS Workshop, Cadarache , 24-25 September 2012. Overview of spectroscopic diagnostics ADAS-based emission modelling for x-ray camera. R (m). 6.2. a (m). - PowerPoint PPT PresentationTRANSCRIPT
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Applications of ADAS to ITER Diagnostics
Robin Barnsley and ITER Diagnostics Division
Martin O’Mullane, Strathclyde University
ADAS Workshop, Cadarache, 24-25 September 2012
- Overview of spectroscopic diagnostics
- ADAS-based emission modelling for x-ray camera
ADAS Workshop, Cadarache, 25 September 2012, R Barnsley
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ITER (www.iter.org)
- Superconducting Tokamak
- Single-null divertor
- Elongated, triangular plasma
- Additional heating from RF, and negative-ion neutral-beams
500Pfus(MW)
10Q (Pfus/Pin)
80+P (MW)
40-90Paux (MW)
1.85, 0.5,
5.3Bt (T)
15(17)IP (MA)
850VP (m3)
2a (m)
6.2R (m)
ADAS Workshop, Cadarache, 25 September 2012, R Barnsley
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ITER cross-section
ADAS Workshop, Cadarache, 25 September 2012, R Barnsley
4ADAS Workshop, Cadarache, 25 September 2012, R Barnsley
5INDiagnostic Neutral BeamEUBolometric Array For Divertor
tbdTritium Retention MonitorsEUBolometric Array For Main Plasma
tbdDust and Erosion MonitorsBolometric System
CNLangmuir ProbesEUCollective Scatt. (LFS front end)
JAIR Thermography DivertorJAPolarimetric Syst. (Pol. Field Meas)
USResidual Gas AnalyzersUSToroidal Interferom./Polarim
EUPressure GaugesRFThomson Scat/LIF Interfaces (Div. region)
EU/JAThermocouplesJAThomson Scattering (Edge)
EU/USIR Cameras, visible/IR TVEUThomson Scattering (Core)
Plasma-Facing Comps and Operational Diagnostics
Optical Systems
USDivertor InterferometerEUHigh Res Neutron Spectr (interfaces)
EUReflectometers for Plasma PosnKONeutron Activation System
RF/USReflectometers for Main PlasmaEU/RFGamma-Ray Spect. (interfaces)
IN/USECE Diagnostics for Main PlasmaRFNeutron Flux Monitors (Divertor)
Microwave DiagnosticsCN
Neutron Flux Monitors (Ex-Vessel)
EUHard X-ray MonitorJAMicrofission Chambers
USMSE (based on heating beam)RFVertical Neutron Camera
RFNeutral Particle AnalysersEURadial Neutron Camera
INBeam Emission SpectroscopyNeutron and Fusion Product Diag.
CNRadial X-Ray CameraEUHalo Current Sensors
IN/USX-Ray Crystal SpectrometersEUDiamagnetic Loop
JAVisible & UV Imp Mon (Div)EUContinuous Rogowski Coils
KOVUV Imp Mon (Main Plas and Div)EUDivertor Magnetics
RFH Alpha SpectroscopyEUIn-Vessel Magnetics
EU/RFCXRS Active Spectr. (based on DNB)EUOuter-Vessel Magnetics
Spectroscopic and NPA SystemsMagnetic Diagnostics
INDiagnostic Neutral BeamEUBolometric Array For Divertor
tbdTritium Retention MonitorsEUBolometric Array For Main Plasma
tbdDust and Erosion MonitorsBolometric System
CNLangmuir ProbesEUCollective Scatt. (LFS front end)
JAIR Thermography DivertorJAPolarimetric Syst. (Pol. Field Meas)
USResidual Gas AnalyzersUSToroidal Interferom./Polarim
EUPressure GaugesRFThomson Scat/LIF Interfaces (Div. region)
EU/JAThermocouplesJAThomson Scattering (Edge)
EU/USIR Cameras, visible/IR TVEUThomson Scattering (Core)
Plasma-Facing Comps and Operational Diagnostics
Optical Systems
USDivertor InterferometerEUHigh Res Neutron Spectr (interfaces)
EUReflectometers for Plasma PosnKONeutron Activation System
RF/USReflectometers for Main PlasmaEU/RFGamma-Ray Spect. (interfaces)
IN/USECE Diagnostics for Main PlasmaRFNeutron Flux Monitors (Divertor)
Microwave DiagnosticsCN
Neutron Flux Monitors (Ex-Vessel)
EUHard X-ray MonitorJAMicrofission Chambers
USMSE (based on heating beam)RFVertical Neutron Camera
RFNeutral Particle AnalysersEURadial Neutron Camera
INBeam Emission SpectroscopyNeutron and Fusion Product Diag.
CNRadial X-Ray CameraEUHalo Current Sensors
IN/USX-Ray Crystal SpectrometersEUDiamagnetic Loop
JAVisible & UV Imp Mon (Div)EUContinuous Rogowski Coils
KOVUV Imp Mon (Main Plas and Div)EUDivertor Magnetics
RFH Alpha SpectroscopyEUIn-Vessel Magnetics
EU/RFCXRS Active Spectr. (based on DNB)EUOuter-Vessel Magnetics
Spectroscopic and NPA SystemsMagnetic Diagnostics
ADAS Workshop, Cadarache, 25 September 2012, R Barnsley
6ADAS Workshop, Cadarache, 25 September 2012, R Barnsley
Overview of diagnostic locations
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PBS SystemWavelength/ Energy range Function Status
55E4 Divertor impurity monitor 200 – 1000 nmImpurity species and influx, divertor He density,
ionisation front position, Ti. CDR held
55E2 Hsystem Visible regionELMs, L/H mode indicator, nT/nD and nH/nD at edge
and in divertor.CDR held
55E3VUV spectroscopy - main
plasma2.3 – 160 nm Impurity species identification. PA signed
55EG VUV spectroscopy - divertor 15 – 40 nm Divertor impurity influxes, particularly Tungsten PA signed
55EH VUV spectroscopy - edge 15-40 nm Edge impurity profiles PA signed
55ED X-Ray spectroscopy – survey 0.1 – 10 nm Impurity species identification CDR complete
55EI X-ray spectrometer - edge 0.4 – 0.6 nm Impurity species identification, plasma rotation, Ti. PA signed
55E5 X-ray spectroscopy-core 0.1 – 0.5 nm Impurity species identification, plasma rotation, Ti. CDR Nov 2012
55E7 Radial x-ray camera 1 – 200 keV MHD, Impurity influxes, Te CDR held
55EB MSE Visible region q (r), internal magnetic structure CDR Jan 2013
55E1 Core CXRS Visible regionTi (r), He ash density, impurity density profile,
plasma rotation, alphas.CDR May 2013
55EC Edge CXRS Visible regionTi (r), He ash density, impurity density profile,
plasma rotation, alphas.CDR Oct 2012
55EF BES Visible region Beam-attenuation and fluctuations. CDR Oct 2012
55E8 NPA 10 keV,- 4 MeV) nT/nD and nH/nD at edge and core. Fast alphas. PA signed
55EA Laser-induced fluorescence Visible Divertor neutrals Pre- CDR held
55E Hard X-ray Monitor 100keV – 20MeV Runaway electron detection CDR Early 2013ADAS Workshop, Cadarache, 25 September 2012, R Barnsley
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From the 2006 ADAS Workshop, Abingdon
ADAS-SANCO modelled ITER broadband x-ray spectra
Line and continuum in 5% energy bands, radially resolved
< 10 keV: mainly impurity information
> 10 keV: mainly Te information
Modern detectors will be able measure this…
ADAS Workshop, Cadarache, 25 September 2012, R Barnsley
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Advances in detector technology enable new measurement capability CERN-led Medipix 3 – in development
Active pixel detector- Each pixel has analog pulse processing, thresholds, and digital counter- 256 x 256 array. Pixels 55 um square - Multiple enrgy windows- 1 us pulse-process time per pixel - Radiation-hard to ~1014 neutron/cm2
Diagnostic applications- X-ray spectroscopy and imaging - Particle detection and spectroscopy - Fast visible and VUV framing (with MCP)- Neutron and gamma spectroscopy
27 September 2004 Michael Campbell
MEDIPIX2 Hybrid Pixel DetectorMEDIPIX2 Hybrid Pixel Detector
Detector and electronics readout are optimized separately
27 September 2004 Michael Campbell
Charge sensitive preamplifier with individual leakage current compensation2 discriminators with globally adjustable threshold3-bit local fine tuning of the threshold per discriminator1 test and1 mask bitExternal shutter activates the counter13-bit pseudo-random counter1 Overflow bit
Medipix2 Cell SchematicMedipix2 Cell Schematic
Preamp
Disc1
Disc2
Double Disc logic
VthLow
VthHigh
13 bits
Shift Register
Input
Ctest
Testbit
Test Input
Maskbit
Maskbit
3 bits threshold
3 bits threshold
Shutter
Mux
Mux
ClockOut
Previous Pixel
Next Pixel
Conf
8 bits configuration
Polarity
Analog Digital
Preamp
Disc1
Disc2
Double Disc logic
VthLow
VthHigh
13 bits
Shift Register
Input
Ctest
Testbit
Test Input
Maskbit
Maskbit
3 bits threshold
3 bits threshold
Shutter
Mux
Mux
ClockOut
Previous Pixel
Next Pixel
Conf
8 bits configuration
Polarity
Analog Digital
10ADAS Workshop, Cadarache, 25 September 2012, R Barnsley
2007 Diagnostic ReviewRadial X-ray Camera added to ITER
Ex-port cameras where possible
Detectors
Slits
Be window
Valve
In-port cameras where necessary
Seconday vacuumRemovable cassette
DetectorsBe windows
Slits
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Diagnostic design process
Physics study, emission modelling etc: ADAS-SANCO
Conceptual system design
Signal and noise modelling: Neutronics
Assess derived measurements relative to the requirements
Conceptual design review
Detail design > review
Manufacturing design > review
Manufacture, installation, commissioning, operation etc
12ADAS Workshop, Cadarache, 25 September 2012, R Barnsley
13ADAS Workshop, Cadarache, 25 September 2012, R Barnsley
14ADAS Workshop, Cadarache, 25 September 2012, R Barnsley
15ADAS Workshop, Cadarache, 25 September 2012, R Barnsley
16ADAS Workshop, Cadarache, 25 September 2012, R Barnsley
17ADAS Workshop, Cadarache, 25 September 2012, R Barnsley
Diagnostic first wall DFW
Diagnostic shield module DSM
Port-plug Port-plug rear flange
Secondary vacuum tube
In-port detectors
Ex-port detectors
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Separate slots for each camera module – big improvement in neutronics- practical DFW slots
Radial X-Ray Camera Conceptual Design Review 21/02/2012 Page 19
Comparison of Total DT neutron FluxS Jakhar
1.72×108
n/cm2/s1.3×1010 n/cm2/s
Improved ModelInitial Model
20Survey & Divertor VUV CDR, Introduction, R Barnsley April 20 2011 20
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Grazing Incidence Angle: 4~40 degree (depend on channels)
Spectral Range: 2.4 nm < λ < 160 nm Resolution ~100 < λ/dλ < ~700
Core VUV – 5-channel VUV spectrometer
22Survey & Divertor VUV CDR, Introduction, R Barnsley April 20 2011 22
5-channel Main Plasma Survey Spectrometers, with shielding concept for MCNP analysis
To plasma
Collimating mirrors
Slits
Spectrometers
Detectors
Shielding
23ADAS Workshop, Cadarache, 25 September 2012, R Barnsley
24ADAS Workshop, Cadarache, 25 September 2012, R Barnsley
KSTAR VUV Spectrometer Test 2012 Campaign (F-Port)CR Seon, MS Cheon, S Pak & HG Lee
87 deg.
• Spectrometer table on the F-port deck
• 3 m - long Vacuum Extension Tube
• Two Gate Valves
• One Bellows
• Collimation Mirror Set
1. Cylindrical 10 cm x 5 cm, R.O.C. = 13.5 cm
2. Convex 10 cm x 5 cm, R.O.C. = 700 cm
Vacuum extension
VUV spectrometer on the optical
table
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First Measurement of KSTAR Plasma Impurity
Fe XVI
Fe XVI
C III
He II
Fe XV
O VI
C IV
He II
O VI
• Impurity lines of initial plasmas at KSTAR 2012 Campaign (2012. 09. 06)
Metal Lines
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Summary
ADAS-based plasma emission modelling is essential for the physics basis of diagnostic system design.
Currently ITER is updating the modelling in support of the system conceptual design reviews (CDR)
Passive spectroscopy almost complete – only core x-ray remains
First prototype in operation – VUV survey
The need for update and expansion of the modelling will continue through the detail design phase into operations