1 applications of adas to iter diagnostics robin barnsley and iter diagnostics division martin...

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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)


3

ITER cross-section


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



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…


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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


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


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

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

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

1 applications of adas to iter diagnostics robin barnsley and iter diagnostics division martin...

Documents

r barnsley slide

te cdr

applications of adas

xray camera adas workshop

n h n d

mevn t n d

impurity density profile

spectroscopy fast visible