PWI TF Meeting, Warsaw, K. Krieger, 04/11/2009 Report on task agreements of WP09-PWI-07 within SEWG...
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Transcript of PWI TF Meeting, Warsaw, K. Krieger, 04/11/2009 Report on task agreements of WP09-PWI-07 within SEWG...
PWI TF Meeting, Warsaw, K. Krieger, 04/11/2009
Report on task agreements of WP09-PWI-07 within SEWG ITER Material Mix
K. Krieger,A. Hakola, Ch. Linsmeier, A. Litnovsky, Ch. Lungu, R. Mateus,
M. Rubel, K. Schmid
PWI TF Meeting, Warsaw, K. Krieger, 04/11/2009
WP09-PWI-07-01Compound formation in binary mixing of Be, C and WInfluence of substrate temperature and dependencies on incoming flux composition.Reaction kinetics for Be-W and Be-C mixtures (e.g Be/W interdiffusion, Be sublimation from Be/W alloys).WP09-PWI-07-02Compound formation in ternary systems of Be, C, W and OFormation and properties of ternary system Be-C-W and influence of oxygen on the underlying processes.WP09-PWI-07-03Material intermixing and fuel retention behaviour under dynamic conditionsD retention properties of mixed materials as function of temperature, composition of mixed material and incident flux composition.
WP09-PWI-07-04Collect data on composition, fuel retention and chemical characterisation from mixed deposits in tokamaksAnalysis of Be-C and W-C deposits collected in tokamaks for comparison to laboratory experiments: composition, fuel retention properties.
WP09-PWI-07-05Modelling of material mixing for extrapolation to ITER conditionsIntegrated plasma-wall Monte Carlo transport modelling, kinetic MC simulation of material mixing; MD modelling of mixed layer properties and processes.
Overview
Basicphysicsstudies
Data fromfusiondevices
Modelling
PWI TF Meeting, Warsaw, K. Krieger, 04/11/2009
WP09-PWI-07-01/IST/PS Responsible Scientist: R. MateusStudy of Be, W and C interdiffusion with microbeam and of carbideand Be/W alloy formation and W alloy sublimation.
WP09-PWI-07-01/MEdC/PS Responsible Scientist: Ch. LunguStudy of substrate temperature influence during film deposition information of the stable alloys: Be2C for the Be-C system and Be2W, Be12W, Be22W for Be-W system.
WP09-PWI-07-02/MEdC/PS Responsible Scientist: Ch. LunguStudy of ternary system formation Be-C-W using thermionic vacuum arcmethod; influence of oxygen on the process.
WP09-PWI-07-02/IPP/PS Responsible Scientist: Ch. LinsmeierAnalysis of ternary systems.
WP09-PWI-07-03/IPP/PS Responsible Scientist: K. SchmidAnalysis of Be-contaminated PISCES samples.
WP09-PWI-07-04/TEKES/PS Responsible Scientist: A. HakolaAnalysis of W-C mixed layers on AUG tiles, work on hot cells.
WP09-PWI-07-04/FZJ/PS Responsible Scientist: A. LitnovskyCharacterisation of mixed W/C layers formed in TEXTOR , analysis offuel retention in W/C mixed layers.
WP09-PWI-07-04/VR/PS Responsible Scientist: M. RubelStudies of material mixing on surfaces exposed to plasma.
Tasks with priority support
PWI TF Meeting, Warsaw, K. Krieger, 04/11/2009
WP09-PWI-07-01/IST/PS Responsible Scientist: R. MateusStudy of Be, W and C interdiffusion with microbeam and of carbideand Be/W alloy formation and W alloy sublimation.
WP09-PWI-07-01/MEdC/PS Responsible Scientist: Ch. LunguStudy of substrate temperature influence during film deposition information of the stable alloys: Be2C for the Be-C system and Be2W, Be12W, Be22W for Be-W system.
WP09-PWI-07-02/MEdC/PS Responsible Scientist: Ch. LunguStudy of ternary system formation Be-C-W using thermionic vacuum arcmethod; influence of oxygen on the process.
WP09-PWI-07-02/IPP/PS Responsible Scientist: Ch. LinsmeierAnalysis of ternary systems.
WP09-PWI-07-03/IPP/PS Responsible Scientist: K. SchmidAnalysis of Be-contaminated PISCES samples.
WP09-PWI-07-04/TEKES/PS Responsible Scientist: A. HakolaAnalysis of W-C mixed layers on AUG tiles, work on hot cells.
WP09-PWI-07-04/FZJ/PS Responsible Scientist: A. LitnovskyCharacterisation of mixed W/C layers formed in TEXTOR , analysis offuel retention in W/C mixed layers.
WP09-PWI-07-04/VR/PS Responsible Scientist: M. RubelStudies of material mixing on surfaces exposed to plasma.
Tasks with priority support
PWI TF Meeting, Warsaw, K. Krieger, 04/11/2009
Be/C interdiffusion, compound formation and sublimation
• C deposition on polished Be samples– C films evaporated with an electron beam
using graphite as source– thickness of hundreds of μm
Current work
• Annealing of Be/C samples in the 100 – 600°C range
• Be/C interdiffusion, compound formation and sublimation• WP09-PWI-07-01/IST/PS task
• Rutherford Backscattering Spectrometry (RBS)• X-ray photoelectron spectroscopy (XPS)• WP09-PWI-07-01/IST/BS task
• Surface observation by Scanning Electron Microscopy (SEM)• (compound formation, surface sublimation ...)
100 150 200 250 300 350
50
100
150
200
C
O
Cou
nts
Channel
Be
RBS spectrum
PWI TF Meeting, Warsaw, K. Krieger, 04/11/2009
WP09-PWI-07-01/IST/PS Responsible Scientist: R. MateusStudy of Be, W and C interdiffusion with microbeam and of carbideand Be/W alloy formation and W alloy sublimation.
WP09-PWI-07-01/MEdC/PS Responsible Scientist: Ch. LunguStudy of substrate temperature influence during film deposition information of the stable alloys: Be2C for the Be-C system and Be2W, Be12W, Be22W for Be-W system.
WP09-PWI-07-02/MEdC/PS Responsible Scientist: Ch. LunguStudy of ternary system formation Be-C-W using thermionic vacuum arcmethod; influence of oxygen on the process.
WP09-PWI-07-02/IPP/PS Responsible Scientist: Ch. LinsmeierAnalysis of ternary systems.
WP09-PWI-07-03/IPP/PS Responsible Scientist: K. SchmidAnalysis of Be-contaminated PISCES samples.
WP09-PWI-07-04/TEKES/PS Responsible Scientist: A. HakolaAnalysis of W-C mixed layers on AUG tiles, work on hot cells.
WP09-PWI-07-04/FZJ/PS Responsible Scientist: A. LitnovskyCharacterisation of mixed W/C layers formed in TEXTOR , analysis offuel retention in W/C mixed layers.
WP09-PWI-07-04/VR/PS Responsible Scientist: M. RubelStudies of material mixing on surfaces exposed to plasma.
Tasks with priority support
PWI TF Meeting, Warsaw, K. Krieger, 04/11/2009
Be alloy and compound formation
0 100 200 300 400 500 6000
20
40
60
80
100
com
posi
tion
Ar+ fluence (1016/cm2)
Be% C% O% W%~450nm total depth
0 100 200 300 400 500 600 7000
20
40
60
80
100
com
posi
tion
Ar+ fluence (1016/cm2)
Be% C% O% ~500nm total depth
Be films deposited on C and W were:• poly-crystalline (proved by TEM–SAED)• sufficiently pure (proved by sputter–XPS)• oxidized surfaces (due to air exposure)• low oxygen content (small increase at
interface due to substrate contribution)
No significant differences in depth profiles were observed with respect to substrate temperature during deposition (possibly due to the short deposition time).
Film preparation Be films of ≈500 nm thickness were deposited on C and W using TVA (thermionic vacuum arc discharge) method with substrates kept at different temperatures.
PWI TF Meeting, Warsaw, K. Krieger, 04/11/2009
0 1000 2000 3000 4000 5000 6000 7000 80000
20
40
60
80
100Be/C 30 minutes annealing
Con
cent
ratio
n (a
t%)
Thickness (1015 at/cm2)
Be before O before C before Be after O after C after
0 1000 2000 3000 4000 5000 6000 7000 80000
20
40
60
80
100
Be before O before C before Be after O after C after
Con
cent
ratio
n (a
t%)
thickness (1015 at/cm2)
Be/C 90 minutes annealing
Thermal treatment of Be films deposited on graphite at 350° C
• Be films of ≈500 nm deposited on graphite were annealed in high vacuum conditions on different time scales at 350°C.
• A mixture of Be2C, BeO and C develops at the film-substrate interface.• On increasing the annealing time, the thickness of this mixed material layer also increases.
0 1000 2000 3000 4000 5000 6000 7000 80000
20
40
60
80
100
Be before O before C before Be after O after C after
Be/C 60 minutes annealing
Con
cent
ratio
n (a
t %)
Thickness (1015 at/cm2)
Thermal treatment of Be films deposited on tungsten is still ongoing. Higher temperatures are necessary for Be-W alloy formation (above 500°C)
Be alloy and compound formation
PWI TF Meeting, Warsaw, K. Krieger, 04/11/2009
E-Beam irradiation/annealing ofW film (100nm) + Be film (200nm) on graphite substrates
0 2000 4000 6000 8000 10000 120000
10
20
30
40
50
60
70
80
90
100
Co
nc (
at%
)
Depth (at/cm2*1015)
W C Be O
Before annealing After annealing at 900oCInterdiffusion of Be and CNo mixing with surface W layer
Be alloy and compound formation
0 2000 4000 6000 8000 10000 120000
20
40
60
80
100
Depth (at/cm2*1015)
Co
nce
ntr
atio
n (
at%
)
W C Be O
Depth profiles derived from RBS analysis
PWI TF Meeting, Warsaw, K. Krieger, 04/11/2009
0 100 200 300 400 500 600 700
1E11
1E12
1E13
1E14
1E15D
2 molecules
Des
orp
tio
n r
ate
(mo
lec
/ sec
)
substrate temperature (oC)
carbon substrate tungsten substrate
Deuterium retention
D implantation was performed with IPP Garching High Current Ion Source. D energy 600 eV D3+
(i.e. 200 eV / D) with normal incidence and target at room temperature. Fluence was 5×1022 D/m2.
No significant differences in retained deuterium amount were observed with respect to substrate material (C or W) and substrate temperature during deposition
TDS spectra of D2 molecules for Be films implanted with 200 eV D+ ions at room temperature:
Be alloy and compound formation
PWI TF Meeting, Warsaw, K. Krieger, 04/11/2009
WP09-PWI-07-01/IST/PS Responsible Scientist: R. MateusStudy of Be, W and C interdiffusion with microbeam and of carbideand Be/W alloy formation and W alloy sublimation.
WP09-PWI-07-01/MEdC/PS Responsible Scientist: Ch. LunguStudy of substrate temperature influence during film deposition information of the stable alloys: Be2C for the Be-C system and Be2W, Be12W, Be22W for Be-W system.
WP09-PWI-07-02/MEdC/PS Responsible Scientist: Ch. LunguStudy of ternary system formation Be-C-W using thermionic vacuum arcmethod; influence of oxygen on the process.
WP09-PWI-07-02/IPP/PS Responsible Scientist: Ch. LinsmeierAnalysis of ternary systems.
WP09-PWI-07-03/IPP/PS Responsible Scientist: K. SchmidAnalysis of Be-contaminated PISCES samples.
WP09-PWI-07-04/TEKES/PS Responsible Scientist: A. HakolaAnalysis of W-C mixed layers on AUG tiles, work on hot cells.
WP09-PWI-07-04/FZJ/PS Responsible Scientist: A. LitnovskyCharacterisation of mixed W/C layers formed in TEXTOR , analysis offuel retention in W/C mixed layers.
WP09-PWI-07-04/VR/PS Responsible Scientist: M. RubelStudies of material mixing on surfaces exposed to plasma.
Tasks with priority support
PWI TF Meeting, Warsaw, K. Krieger, 04/11/2009
Be anode assembly
Elemental mapping (EDS analysis) and concentration compositions of Be-C-W films
deposited on silicon substrates
Ternary system formation Be-C-W
C-W anode assembly
PWI TF Meeting, Warsaw, K. Krieger, 04/11/2009
0.5 1.0 1.5 2.0 2.5 3.02
4
6
8
10
Oxi
gen
(At%
)
Deposition rate (nm/s)
Depositions performed at 3*10-6torr
0.5 1.0 1.5 2.0 2.5 3.02
4
6
8
10
Oxi
gen
(At%
)
Deposition rate (nm/s)
Depositions performed at 3*10-6torr
p=3*10-5torr
O-concentration dependency on deposition rate
0 2000 4000 6000 8000 10000 120000.0
0.2
0.4
0.6
0.8
1.0
Be W O C
Co
nc.
(re
l)
Depth (At/cm^2)
RBS Depth ProfileFilm composition and oxygen contamination during film preparation
Sample deposited at 350° C
0 20 40 60 80 100 120 140 160 180 200 220 240 260 2800.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
Co
mp
osi
tion
Ar+ fluence (1016/cm2)
Be O C W
Elemental depth profile
XPS analysis
0 50 100 150 200 2500.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
De
con
volu
tion
of
the
Be
1s
pe
ak
Ar+ fluence (1016/cm2)
Be% met% alloy% oxide% carbide%
Beryllium structure versus depthBe2C formation attributed to ion bombardment. Oxygen found only at interface and at surface
Depth profiles show varying mixing fractions of Be, W and C.
Oxygen inclusion can be controlled trough deposition rate
Further morphology analysis and D implantation and retention studies ongoing
Ternary system formation Be-C-W
PWI TF Meeting, Warsaw, K. Krieger, 04/11/2009
WP09-PWI-07-01/IST/PS Responsible Scientist: R. MateusStudy of Be, W and C interdiffusion with microbeam and of carbideand Be/W alloy formation and W alloy sublimation.
WP09-PWI-07-01/MEdC/PS Responsible Scientist: Ch. LunguStudy of substrate temperature influence during film deposition information of the stable alloys: Be2C for the Be-C system and Be2W, Be12W, Be22W for Be-W system.
WP09-PWI-07-02/MEdC/PS Responsible Scientist: Ch. LunguStudy of ternary system formation Be-C-W using thermionic vacuum arcmethod; influence of oxygen on the process.
WP09-PWI-07-02/IPP/PS Responsible Scientist: Ch. LinsmeierAnalysis of ternary systems.
WP09-PWI-07-03/IPP/PS Responsible Scientist: K. SchmidAnalysis of Be-contaminated PISCES samples.
WP09-PWI-07-04/TEKES/PS Responsible Scientist: A. HakolaAnalysis of W-C mixed layers on AUG tiles, work on hot cells.
WP09-PWI-07-04/FZJ/PS Responsible Scientist: A. LitnovskyCharacterisation of mixed W/C layers formed in TEXTOR , analysis offuel retention in W/C mixed layers.
WP09-PWI-07-04/VR/PS Responsible Scientist: M. RubelStudies of material mixing on surfaces exposed to plasma.
Tasks with priority support
PWI TF Meeting, Warsaw, K. Krieger, 04/11/2009
Information depth depends on kinetic energy of photoelectrons
Kinetic energy of photoelectrons depends on energy of the photons
By changing the excitation energy the information depth can be changed
Ternary system: C/BeO/W
XPS with synchrotron radiation
PWI TF Meeting, Warsaw, K. Krieger, 04/11/2009
C 1s: After annealing at 875 K
Experiment•PVD of C on BeO on W•Annealing steps up to 1370 K•Recording of spectra with
6 different energies after each experimental step
Results•Observation: Tungsten
subcarbide formation near the C-BeO-interface (red circle)
•Explanation: •Diffusion of BeO into the
tungsten substrate•Tungsten and carbon get in
touch in the surface near region
Increasing surface sensitivityTernary system: C/BeO/W
PWI TF Meeting, Warsaw, K. Krieger, 04/11/2009
WP09-PWI-07-01/IST/PS Responsible Scientist: R. MateusStudy of Be, W and C interdiffusion with microbeam and of carbideand Be/W alloy formation and W alloy sublimation.
WP09-PWI-07-01/MEdC/PS Responsible Scientist: Ch. LunguStudy of substrate temperature influence during film deposition information of the stable alloys: Be2C for the Be-C system and Be2W, Be12W, Be22W for Be-W system.
WP09-PWI-07-02/MEdC/PS Responsible Scientist: Ch. LunguStudy of ternary system formation Be-C-W using thermionic vacuum arcmethod; influence of oxygen on the process.
WP09-PWI-07-02/IPP/PS Responsible Scientist: Ch. LinsmeierAnalysis of ternary systems.
WP09-PWI-07-03/IPP/PS Responsible Scientist: K. SchmidAnalysis of Be-contaminated PISCES samples.
WP09-PWI-07-04/TEKES/PS Responsible Scientist: A. HakolaAnalysis of W-C mixed layers on AUG tiles, work on hot cells.
WP09-PWI-07-04/FZJ/PS Responsible Scientist: A. LitnovskyCharacterisation of mixed W/C layers formed in TEXTOR , analysis offuel retention in W/C mixed layers.
WP09-PWI-07-04/VR/PS Responsible Scientist: M. RubelStudies of material mixing on surfaces exposed to plasma.
Tasks with priority support
PWI TF Meeting, Warsaw, K. Krieger, 04/11/2009
Be and D area densities in the near surface region determined using NRA
Sample plasma exposure history:PISCES-B Targets (Pure D plasma)
Name Fluence
WITER1 ****
WITER2 1.2×1026 D ions/m-2
WITER3 5.0×1025 D ions/m-2
WITER4 2.0×1025 D ions/m-2
PISCES-B Witness plates (D+He mixed plasmas)
Name Temperature of Target
W WIT. PL. IPP 1 373 K
W WIT. PL. IPP 2 459 K
W WIT. PL. IPP 3 410 K
CU WIT. PL. 1 393 K
Be net deposition conditions
Be net erosion conditions
Be/D co-deposition studies in PISCES
PWI TF Meeting, Warsaw, K. Krieger, 04/11/2009
Question:Amount of D left after 1273K TDS
Question:D/Be ratio in co-deposits
D amount scales with Be content In all cases significant D left
D/Be ratio 0.1 +/- 0.05 No significant variation within the
100K target temperature range
Be/D co-deposition studies in PISCES
W ITER 1 W ITER 2 W ITER 3 W ITER 4
1E17
1E18
1E19
1E14
1E15
1E16
1E17
1E18
Be
/ cm
2
Sample ID
Be deposition case has highest D level
Significant amounts remain afterTDS also in Be net erosion case
W WIT. PL. IPP1W WIT. PL. IPP2W WIT. PL. IPP3 CU WIT. PL.11E17
1E18
1E19373 K 459 K 410 K 393 K
1E16
1E17
1E18
Target temperature
Sample ID
D /
cm-2
PWI TF Meeting, Warsaw, K. Krieger, 04/11/2009
WP09-PWI-07-01/IST/PS Responsible Scientist: R. MateusStudy of Be, W and C interdiffusion with microbeam and of carbideand Be/W alloy formation and W alloy sublimation.
WP09-PWI-07-01/MEdC/PS Responsible Scientist: Ch. LunguStudy of substrate temperature influence during film deposition information of the stable alloys: Be2C for the Be-C system and Be2W, Be12W, Be22W for Be-W system.
WP09-PWI-07-02/MEdC/PS Responsible Scientist: Ch. LunguStudy of ternary system formation Be-C-W using thermionic vacuum arcmethod; influence of oxygen on the process.
WP09-PWI-07-02/IPP/PS Responsible Scientist: Ch. LinsmeierAnalysis of ternary systems.
WP09-PWI-07-03/IPP/PS Responsible Scientist: K. SchmidAnalysis of Be-contaminated PISCES samples.
WP09-PWI-07-04/TEKES/PS Responsible Scientist: A. HakolaAnalysis of W-C mixed layers on AUG tiles, work on hot cells.
WP09-PWI-07-04/FZJ/PS Responsible Scientist: A. LitnovskyCharacterisation of mixed W/C layers formed in TEXTOR , analysis offuel retention in W/C mixed layers.
WP09-PWI-07-04/VR/PS Responsible Scientist: M. RubelStudies of material mixing on surfaces exposed to plasma.
Tasks with priority support
PWI TF Meeting, Warsaw, K. Krieger, 04/11/2009
SIMS used for surface analysis of retrieved ASDEX Upgrade samples: samples with a diameter of 17mm were cut from tiles 5-keV O2
+ primary ion beam used for sputtering positive secondary ions detected beam rastered across a 300×430-μm2 area contributions from walls of SIMS craters eliminated using a 10-% electronic gate
and a 1-mm optical gate sputtering rates: 0.37 nm/s for W coating, 1.5 nm/s for C (graphite) bulk
6A
4
6B
5
4B 9C
9B-1 9B-2
9A
10
1
2
3A
3Bs = 83 s = 196
1 29 35 20
1a 2a
9 36 19
Redeposited mixed material in AUG
Tile 6B
PWI TF Meeting, Warsaw, K. Krieger, 04/11/2009
analyzed tiles had 0.2 and 0.5 mm thick W coatings on them.
redeposition results in a thin surface layer (thickness < 0.5 μm).
carbon (12C) and boron are the dominant elements deposited on W, deuterium is mostly retained in the deposited layer.
6A
4
6B
5
4B 9C
9B-1 9B-2
9A
10
1
2
3A
3BInner-divertor tile 6B Outer-divertor tile 3A
Depth (m)
0 1000 2000 3000 4000 5000 6000
Inte
nsi
ty (
s-1)
100
101
102
103
104
105 HDB12C13CCrW
Depth (m)
0 1000 2000 3000
Inte
nsi
ty (
s-1)
100
101
102
103
104
105 HDB12C13CCrW
Redeposited mixed material in AUG
depth profiles of baffle tiles from 2008 campaign
PWI TF Meeting, Warsaw, K. Krieger, 04/11/2009
WP09-PWI-07-01/IST/PS Responsible Scientist: R. MateusStudy of Be, W and C interdiffusion with microbeam and of carbideand Be/W alloy formation and W alloy sublimation.
WP09-PWI-07-01/MEdC/PS Responsible Scientist: Ch. LunguStudy of substrate temperature influence during film deposition information of the stable alloys: Be2C for the Be-C system and Be2W, Be12W, Be22W for Be-W system.
WP09-PWI-07-02/MEdC/PS Responsible Scientist: Ch. LunguStudy of ternary system formation Be-C-W using thermionic vacuum arcmethod; influence of oxygen on the process.
WP09-PWI-07-02/IPP/PS Responsible Scientist: Ch. LinsmeierAnalysis of ternary systems.
WP09-PWI-07-03/IPP/PS Responsible Scientist: K. SchmidAnalysis of Be-contaminated PISCES samples.
WP09-PWI-07-04/TEKES/PS Responsible Scientist: A. HakolaAnalysis of W-C mixed layers on AUG tiles, work on hot cells.
WP09-PWI-07-04/FZJ/PS Responsible Scientist: A. LitnovskyCharacterisation of mixed W/C layers formed in TEXTOR , analysis offuel retention in W/C mixed layers.
WP09-PWI-07-04/VR/PS Responsible Scientist: M. RubelStudies of material mixing on surfaces exposed to plasma.
Tasks with priority support
PWI TF Meeting, Warsaw, K. Krieger, 04/11/2009
W balance in TEXTORMotivation: Test of W layer deposition during plasma operation.Fluorine long-term retention in plasma-facing components
Toroidal LimiterLocation of test limiter
Toroidal Limiterpoloidal
7 cm
toro
idal
11 c
m
Test Limiter after exposure
Surface analysis bySEM, EDX, EPMASIMS, NRA, RBS
Injection of WF6 during 7 NBI heated shots
3×1019 WF6 mol/shot = 2×1020 total
Shots without injection in between shots with WF6 injection
Hydrogen flux at injection (D+, r = 47.5) ≈ 4×18 /cm²s
PWI TF Meeting, Warsaw, K. Krieger, 04/11/2009
W balance in TEXTOR
•Similar deposition profiles on tiles from different locations.•16 % of injected tungsten found by ion beam analysis. •No fluorine found on ALT-II (important result).•No evidence of compound formation on the plates.
Injected 2×1020 100 %Local deposition:
Injection plate0.02×1020 1 %
Local deposition:
Back plate (integrated)0.134×1020 7 %
ALT-II (integrated) 0.16×1020 8 %0,00
0,50
1,00
1,50
2,00
2,50
0 5 10 15
Poloidal direction [cm]
W c
on
ten
t [
E15
/cm
2]
ALT-II 1/19
ALT-II 5/19
Toroidal limiter tile
Dep
ositi
on z
one
Eros
ion
zone
W distribution along the tiles
NiCr Fe
Fe
Ni Mo MoClMoNi
Mo Cl Ni
Fe
Cl
Ni
MoCr FeSi
CrOCr
C
1 2 3 4 5 6 7 8 9
keVFull Scale 681 cts Cursor: 0.093 (9 cts)
1
C, Cr, Ni, Fe, Mo, Sibut no W detected with EDS and EPMA
Surface after WF6 puffing experiment
PWI TF Meeting, Warsaw, K. Krieger, 04/11/2009
Summary
Properties of mixed materials of ITER PFMs (Be, C, W) and formation ofcompounds studied under controlled conditions to establish data base onfundamental processes.Depending on temperature carbides and metallic alloys may form.Data on interdiffusion of respective species still incomplete.
Strong influence of deposited (foreign/mixed) material layers on D retention D codeposition with Be quantified
Further effort required to integrate fundamental results withplasma device data
Integrated plasma-wall modelling
PWI TF Meeting, Warsaw, K. Krieger, 04/11/2009
Baseline Support Summary Table TA: WP09-PWI-07
*)Completed, Partially done, Not done
Task id.Associations involved
Manpower (PPY)
Status*)Short description with milestones/deliverables
WP09-PWI-07-05/CEA/BS CEA 1.25 Quantum modeling of Be/W alloy formation and reactivity
WP09-PWI-07-03/FOM/BS FOM 0.40
Material intermixing at ITER relevant fluxes in Pilot-PSI: Study of dynamic processes with C and Al (to mimic Be) on W targets.
MD Modelling of W-C-D mixed layers with HCPARCAS
WP09-PWI-07-04/FZJ/BS FZJ 0.40Characterisation of mixed W/C layers formed in TEXTOR, analysis of fuel retention in W/C mixed layers
WP09-PWI-07-05/FZJ/BS FZJ 0.50ERO code simulation of mixed layer formation, application to PISCES- B Be- seeding experiments
WP09-PWI-07-02/IPP/BS IPP 1.00 Analysis of ternary systems
WP09-PWI-07-03/IPP/BS IPP 0.20 Analysis of mixed material samples from PISCES
WP09-PWI-07-04/IPP/BS IPP 0.20Data collection of chemical compositions of mixed deposits
WP09-PWI-07-05/IPP/BS IPP 0.40MD calculations and potential development in collaboration with TEKES
WP09-PWI-07-04/IPPLM/BS IPPLM 1.25Laser ablation spectroscopy of samples from TEXTOR and AUG samples
PWI TF Meeting, Warsaw, K. Krieger, 04/11/2009
Baseline Support Summary Table TA: WP09-PWI-07
*)Completed, Partially done, Not done
Task id. Associations involved
Manpower (PPY)
Status*) Short description with milestones/deliverables
WP09-PWI-07-01/IST/BS IST 0.10 Study of Be, W and C interdiffusion, carbide and alloy formation
WP09-PWI-07-01/MEdC/BS MEdC 0.50 Study of substrate temperature influence during film deposition in formation of stable compounds. Study of reaction kinetics for Be-C and Be-W using thermal desorption (TDS).
WP09-PWI-07-02/MEdC/BS MEdC 0.50 Study of the ternary system Be-C-W and the influence of oxygen on the system using thermionic vacuum arc method.
WP09-PWI-07-04/TEKES/BS TEKES 0.05 Analysis of W-C mixed layers on AUG tiles
WP09-PWI-07-05/TEKES/BS TEKES 1.20 MD simuation of mixed material properties and corresponding PSI processes. Coupling MD material simulation with ERO.
WP09-PWI-07-04/VR/BS VR 0.20 Studies of material mixing on surfaces exposed to plasma.