Transcript EFDA Ceramic Irradiation Database

EFDA Ceramic Irradiation Database
M Cecconello, C Ingesson, E Hodgson and M Decreton
10th Diagnostic ITPA meeting, Moscow, 10-14 April 2006
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Motivations
Since the detailed design of many diagnostics and heating and current drive
systems is still an ongoing process, it is important to provide the designers of
such systems the appropriate information for the choice of the materials to be
used.
In addition, inputs from the designers are needed in case tests of new
materials and component are required.
Therefore a Ceramic Irradiation Database is of primary importance for the
ongoing design of ITER diagnostics.
The Ceramic Irradiation Database aims to provide:
- reference to the results of the EFDA Ceramic Irradiation Programme
- a searchable repository of documents
- a searchable database suitable for designer of diagnostics and H&CD systems
10th Diagnostic ITPA meeting, Moscow, 10-14 April 2006
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Overview table sorted per topic (I)
Insulators
plasma-sprayed
low-quality spinel
(LWKG)
NBI large insulator
RIC, RIED, surface
degradation
TW1: 70 Gy/s
electron irradiation,
1 kV/mm, 400°C, high
vacuum
Volume RIC acceptable
and dose independent.
Surface electrical
degradation above 150°C
TW1 Del. 11
alumina based
porcelain (HF25)
NBI large insulator
RIC, RIED, surface
degradation
70 Gy/s
electron irradiation,
1 kV/mm, 400°C, high
vacuum
Acceptable behaviour for
<1kV/mm and <200°C
TW0 D17
insulator gases (air
and SF6)
NBI insulator
RIC
TW1: 2 Gy/s
electron irradiation,
100 kV/m, 2 bar gas
Good agreement with
modelling, allowing
extrapolation to ITER size
components
TW1 Del. 11
Alumina
NBI
Insulation resistance
300 kV X-rays at 1 Gy/s
Vacuum, 20 – 700 °C
RIC is clearly observed
TW3, D13
Difficulties in the
conductivity
measurements
MgO
NBI
Insulation resistance
300 kV X-rays at 1 Gy/s
Vacuum, 20 – 700 °C
RIC is clearly observed
TW3, D13
Difficulties in the
conductivity
measurements
Sapphire
NBI
Insulation resistance
100 kV X-rays at 0.1-0.2 Gy/s
Vacuum, 100 – 500 °C
Small RIC effect: from 8 ´
10-14 S/m to 6 ´ 10-11 S/m
TW4, D8
LWKG
NBI
Insulation resistance
100 kV X-rays at 0.1-0.2 Gy/s
Vacuum, 100 – 500 °C
Small RIC effect: from 4 ´
10-13 S/m to 4 ´ 10-12 S/m
TW4, D8
HF25
NBI
Insulation resistance
100 kV X-rays at 0.1-0.2 Gy/s
Vacuum, 100 – 500 °C
Small RIC effect: from 3 ´
10-12 S/m to 6 ´ 10-12 S/m
TW4, D8
HF10
NBI
Insulation resistance
100 kV X-rays at 0.1-0.2 Gy/s
Vacuum, 100 – 500 °C
Small RIC effect: from 2 ´
10-12 S/m to 7 ´ 10-12 S/m
TW4, D8
Epoxy glue
NBI
Insulation resistance
100 kV X-rays at 0.1-0.2 Gy/s
Vacuum, 100 – 500 °C
Small RIC effect: from 6 ´
10-13 S/m to 7 ´ 10-12 S/m
TW4, D8
Other ways of looking at the data…
10th Diagnostic ITPA meeting, Moscow, 10-14 April 2006
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KS-4V Progress summary table
Property tested
TW 1 & 2
Mechanical strength
neutron irradiation
1022 n/m2 (10–3 dpa)
100 °C
RIA
g irradiation
3.6 GGy
neutron irradiation
1022 n/m2 (10–3 dpa)
50 °C
UV-IR
RIL
g irradiation
3.6 GGy
neutron irradiation
1022 n/m2 (10–3 dpa)
50 °C
UV-IR
Dielectric loss
neutron irradiation
1022 n/m2 (10–3 dpa)
100 °C
n < 140 GHz
RED
Laser damage
TW3
TW4
TW5
Neutron irradiation
Fluence 1022 n/m2 (E > 0.1 MeV)
50 °C
UV-IR
Neutron irradiation
Fluence 1020 n/m2 (E > 0.1 MeV)
50 °C
UV-IR
In-situ radiation-induced absorption
and luminescence of alternative
radiation-resistant glasses.
Radiation enhanced incorporation of
hydrogen isotopes in silicas and
aluminas.
Neutron irradiation
Fluence 1020 n/m2 (E > 0.1 MeV)
50 °C
UV-NIR
In-situ radiation-induced absorption
and luminescence of alternative
radiation-resistant glasses.
Radiation enhanced incorporation of
hydrogen isotopes in silicas and
aluminas.
neutron irradiation
1022 n/m2 (10–3 dpa)
50 °C
n < 10 GHz
Radiation enhanced incorporation of
hydrogen isotopes in silicas and
aluminas.
D implanted at 30-50 kV with 2-5
1016 ions/cm2
60Co g-rays at 10 Gy/s and 0.8 MGy
Room temperature, N2 atmosphere
1.8 MeV electron at 220 MGy 320 °C
30 MeV Si5+ at 25 mC
In-situ radiation enhanced diffusion
of hydrogen isotopes in silicas and
aluminas.
7´1022 W/m2 laser power
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Al Mirrors Progress summary table
Property tested
TW 1 & 2
TW3
TW4
TW5
g-rays at 50 MGy
Dry Air, Dry Nitrogen, Humid Air
Al
Reflectivity
60Co
Al with SiO2 overcoating
Reflectivity
60Co
Al with SiO2 overcoating
Reflectivity
1.8 MeV e- at 10 MGy
Vacuum, Dry nitrogen, Air
g-rays at 50 MGy
Dry Air, Dry Nitrogen
TW5-TPDC-IRRCER Deliverable
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Al with dielectric multilayer
overcoating
Reflectivity
60Co
g-rays at 40 MGy
Dry Nitrogen
TW5-TPDC-IRRCER Deliverable
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Al with MgF2 overcoating
Reflectivity
60Co
g-rays at 40 MGy
Dry Nitrogen
TW5-TPDC-IRRCER Deliverable
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Al with SiO2 overcoating
Reflectivity
60Co
g-rays at 40 MGy
Dry Nitrogen
TW5-TPDC-IRRCER Deliverable
14
Al with Al2O3 overcoating
Reflectivity
60Co
g-rays at 40 MGy
Dry Nitrogen
TW5-TPDC-IRRCER Deliverable
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10th Diagnostic ITPA meeting, Moscow, 10-14 April 2006
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Ceramic Material Database
The Ceramic Irradiation Database should:
1.
provide the designers diagnostic and H&CD systems information on the
different physical properties of irradiation tested materials and components,
2.
provide the basis for the request of the testing of new materials and
components or testing to higher dose rates and doses and different
conditions,
3.
form the basis of a cross-party database of irradiation effects on
materials and components
4.
form the basis of a database for irradiation tested materials and
components throughout ITER lifetime for use in the design of diagnostics
for the next generation of burning plasma devices.
In addition it should provide tools for:
1.
the input,
2.
access (query/search) and
3.
management of documents and data.
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Plan for the database development
Provided an EU laboratory can be found to take on the task of developing the
database, the following steps are foreseen as part of a task that will be
initiated soon:
1. Discuss with radiation-effects experts the kind of information that is available
and relevant (irradiation and measurement conditions for example).
2. Discussion with the designers of the ITER diagnostics, as potential users of
the database, to assess what information is required by them.
3. Development of the database structure and content that best fits the
requirements and constraints. How the experimental caveats on conditions
and results in the database can be dealt with should get special attention 
next page.
4. Choice of the appropriate software tools to guarantee the maximum
compatibility (Excel and/or SQL server for example) and database access
(such as Web based access tools to the database).
5. Set up of the database with sufficient flexibility for expansion for potential
future requirements (e.g. full data storage for QA).
6. Development of appropriate tools for the database data input, edit, query and
management according.
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Functionality and issues
Three levels of functionality are foreseen:
1. Store information from experiments in a searchable form
2. Prepare reports on status of experimental information for a particular
material/property/components (such as the summary tables shown above)
3. Provide a facility to ask questions such as “to what radiation level is this
material radiation hard ?” and “What suitable material exists for a particular
application?” This level is very challenging and will only be attempted on a
best-effort basis.
Issues:
1. How to populate the database? Should be by the producers of the data.
2. How to moderate the data input?
3. Overseeing of future improvements?
4. How to turn it into a cross-party facility?
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