Transcript M Walsh : Progress in ITER Diagnostics

Progress in ITER Diagnostics
Michael Walsh
and the ITER Diagnostics Team
(IO Diagnostics, all DAs and supporters, associated groups)
24/09/2012
The views and opinions expressed herein do not necessarily reflect those of the ITER Organization
17th ADAS Workshop, Cadarache, France 2012
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Overview
•
•
•
•
•
•
Our purpose
Up on site
Where are we going?
Where are we now?
Integration
What next?
17th ADAS Workshop, Cadarache, France 2012
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ITER Scope - Mission Goals
Physics:
• ITER is designed to produce a plasma dominated by a-particle
heating
• produce a significant fusion power amplification factor (Q ≥ 10) in
long-pulse operation
• aim to achieve steady-state operation of a tokamak (Q = 5)
• retain the possibility of exploring ‘controlled ignition’ (Q ≥ 30)
Technology:
• demonstrate integrated operation of technologies for a fusion power
plant
• test components required for a fusion power plant
• test concepts for a tritium breeding module
17th ADAS Workshop, Cadarache, France 2012
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ITER Plasma Scenario - ELMy H-mode
A Q=10 scenario with:
keV
Ti
1019m-3
Ip=15MA, Paux=40MW, H98(y,2)=1
ne
Te
10nHe
Plasma start-up in PF Scenario 2
Plasma start-up in PF Scenario 2
5
5
0.5MA - XPF
XPF - SOF
15MA (SOF)
4
Dashed line: reference plasma
4
Zeff
3
2
2
1
1
0
%
3
Z, m
4.5MA (XPF)
fHe
0
qY
-1
-1
1.5MA
2.5MA
-2
ce
-2
3.5MA
-3
-3
-4
-4
-5
-5
3
4
5
6
R, m
7
8
9
3
4
5
6
7
8
9
m2s-1
0.5MA
MA/m2
Z, m
4.5MA (XPF)
R, m
Current Ramp-up Phase
17th ADAS Workshop, Cadarache, France 2012
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How to go forward
• Achieving the ITER mission is a challenge and we are
tasked with this
• And this will only be done with your skills, expertise,
collaboration and tenacity – but we must be coordinated
• Recently voted no 2 in “The 10 World Changing
Experiments that will shape the future and affect every
single person including you”- BBC Focus
17th ADAS Workshop, Cadarache, France 2012
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TF Coil – To contextualise
Mass of (1) TF Coil:
16 m Tall x 9 m Wide, ~360 t
Boeing 747-300
(Maximum Takeoff Weight) ~377 t
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A more integrated system
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What is happening up on site?
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What is happening up on site?
Eighteen months after the beginning of excavation works (August 2010), the Tokamak
Complex ground support structure is completed in April. Photo: Engage-AP
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Spreader installed in PF Building
ITER Diagnostic Division
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Powerline Installation
In difficult areas, helicopters are used to position temporary "pulling cables" that will
later be attached to the actual power cables and pulled by a ground-based winch.
Photo: © CEA/Corinne Guis (Feb 2012)
ITER Diagnostic Division
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Office building progressing well
New office building should be ready by October (Diags move there in November- to floor 3)
ITER Diagnostic Division
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Current plan for diagnostics
• Plan is to complete majority of CDRs this year
• First deliveries in diagnostics in 2 years
• Majority of systems on ITER in approximately 8-9 years
• Design review status of systems…………………
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Diagnostic Design Review Progress 2010/11/12
System
System
System
System
System
System
*Generic Upper
Port Structure
PDR
Micro-fission
chambers
Windows and
Window
Assemblies
Divertor
Thermocouples
(inner)
SXR
EQ 11 PI
Residual Gas
Analyser
Activation system
Equatorial VUV
Spectroscopy
Divertor
Thermocouples
(outer)
Radial Neutron
camera
UPP 11,14 PI
Neutron flux
Monitors Eq 7
UPP X-ray
Spectrometer
Equatorial X-ray
Spectroscopy
Halpha (and
Visible
Spectroscopy)
Divertor IR
EQPP 9 PI
Neutral Particle
Analyser
HFS
Reflectometer
Divertor VUV
Spectroscopy
Divertor TS
Divertor Impurity
Monitor
UPP 10 PI
Upper Visible/IR
Magnetics Part 2
Divertor Neutron
Flux Monitor
LFS
Reflectometry
Poloidal
Polarimetry
UPP 9 PI
VUV Upper port
Generic EQ Port
Structure CDR
*Eq Port Plug
Generic PDR
TIP
UPP 18 PI
TF Magnetics
(CDR, PDR)
Pressure Gauges
Magnetics Part
III
ECE
Lo 2 PI
Concept design except * which is PDR
Each ITER Partner is involved in Diagnostics and well integrated at the DRs
PA Signed, In house work, PA signed in next 6 weeks, other
Several more CDRs/PDRs coming up this year and early next year
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Coordination
• Development of new planning for ITER based on more
collaborative approach
• New terms are :
OPS
SMP
DWS
•
•
•
•
Worked very closely with all ITER (IO and DAs)
Now reasonable basis plan
Now will need to make it happen
Total must be greater than the sum of the parts
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Integration
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Zones of integration (infrastructure)
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First Mirrors Major Areas to be Tackled
ITPA SWG identified 6 main areas:
• Material choice for erosion and deposition dominated conditions
• Predictive modeling of plasma/neutral environment and
• Irradiation effects on mirror optical properties
• Mitigation of deposition – Beryllium (and Carbon)
• Cleaning of deposited layers Beryllium (and/or Carbon)
• Laser/Plasma Sputtering
• Mirror tests under neutron, gamma, and x-ray environment
• Engineering and Manufacturing of ITER first mirrors and supporting
mirror surface recovery systems
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Reflections: Look at Upper Vis/IR System
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Reflection simulation examples for ITER Infrared diagnostics
[M.H. Aumeunier et al., SOFE 2011]
No reflections
Realistic
reflections with
Be, W and CFC
divertor
Realistic reflections with Be
and W divertor – note
significant influence of
angular dependence of W
emissivity, which is not
corrected here
The maximum temperature is estimated relatively correctly, especially if angular
dependence of emissivity is accounted for, but in cooler areas large deviations are
observed due to reflections.
Knowledge of optical properties of observed target is important.
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Spectroscopy
• Many CDRs completed here (x-ray, VUV, Balmer-alpha)
• Active Spectroscopy coming up next month (RF CXRS)
• KO-VUV first Prototype results last week
• For visible systems – shiny vessel so need to be careful
of divertor light – modelling here
• ADAS involved in modelling at different stages
• Good to see an overall modelling strategy that meshes
• Need to work together to provide well verified models
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Summary
• Procurement contracts for many systems are now
officially in place
• All DAs now have at least one PA project (Annex B)
• Many of the projects are really underway
• Timely delivery of the ITER mission is very important
(including diagnostics!)
• We need to continue to work together
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Thank you for listening
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