SP E kick-off meeting 2023

Tuesday 14 Mar 2023, 09:30 → 11:45 Europe/Berlin

https://us02web.zoom.us/j/83705344728?pwd=eVk3enJxVTN6RHJ3dEM4eWxabUpVdz09 Meeting ID: 837 0534 4728 Passcode: 603576 (Zoom)

1 Overview of SP E in 2023

Speaker: Jari Likonen (VTT)

SPE_Introduction_Likonen.pptx

2 CU activities in 2023: LIBS experiments of JET samples at VTT/FZJ – plans

Speaker: Pavel Veis (CU)

P_Veis WP PWIE SPE KoM 13 Mar 2023 def.pdf

Work done in 2022:
• Campaign of LIBS measurements of Be-coating samples and bulk Be JET limiter samples in VTT in May 2022
• LIBS results of Be-coating samples (depth profiling of main elements and D/H) – will be presented at
PFMC conf. in Bonn in May 2023

Plans for 2023:
• Campaign of LIBS measurements of JET samples in VTT in 2023 (if possible)
• LIBS analysis of JET Be limiter samples (depth profiling, partial quantification)

3 FZJ activities in 2023: Fuel retention analysis by TDS and LID-QMS – plans

Speaker: Miroslaw Zlobinski (FZJ)

FZJ_LIDQMS_TDS_plans20230314_V3.pptx

Status:

• FREDIS is back to operation in early March

• FREDIS is probably going out of operation in autumn 2023 due to construction work on the new hot cells in the same room as FREDIS
   

Plan for 2023:

• several samples/components at FZJ waiting for TDS and LID-QMS analyses
• several castellation samples from IWGL tile 2XR10, 2B2C dump plate and  4D14 WPL tile
• 9 small Be castellation samples from 2XR11 and 4D15 (exposed in 2011-2016)
• poloidal section of divertor tile HFGC14LH (ILW3), for comparison of D retention with LID-QMS and NRA
• W divertor lamellas (A14, B14 from ILW2; B12, B13 from ILW3)
• poloidal section of 14ING1C (ILW3),  perform poloidal laser scan for D profile
• new poloidal fragment of tile 14IWG1A (ILW1-3) and full complete HFGC tile (ILW1-3),  perform poloidal laser scan for D profile

4 IAP activities in 2023: Sample preparation and TDS and GDOES analysis of JET samples- plans

Speaker: Edi Grigore

Analysis of samples from JET divertor tiles_IAP_KoM_E_Grigore.pdf

IAP PWIE SP E KoM 2023 Porosnicu-Lungu.pptx

Edi Grigore:

• GDOES analysis of divertor core samples from 14IWG1A completed in 2022
• Be migrated to depths of ~25um at the bottom of tile 1 and up to depths of ~50um near the top of the tile
• Sample 12d from apron (top horisontal part) of tile 1 was not suitable for GDOES anlaysis
• Action on Jari to check if any other normal core from apron of tile 1 could be sent to IAP
• Analysis plan for 2023: GDOES analysis of core samples from tiles 4, 6, 7 and 8

Bobi Porosnicu:

• Cutting of IWGL tile with runaway electron damage successfully cut and optical microscopy completed
• Single castellations from this IWGL tile sent to IST for IBA analysis and to FZJ for metallographic investigations 
• Cutting of W lamellae completed and samples sent to various RUs.
• TDS analysis of divertor samples and Be castellations completed, next step is to compare GDOES and TDS results with each other
• Bobi presented other capabilities at IAP (tritiation of samples, nanointendation, XPS, LIBS...)
• Action on Jari to check if louvre clips need to be cut up

5 IPPLM activities in 2023: Electron microscopy and nanoindentation of JET PFCs – plans

Speaker: Elzbieta Fortuna-Zalesna (IPPLM)

SPE_2023_kick-off-final-2.pdf

• Nanohardness of Langmuir probes (LP) 1 and 5 measured
  • probe 5: clear difference in hardness values for the tip and base 
  • ISP was occasionally on stack B which could explain the differences in hardness for LP5
  • Only small differences between base and tip for LP1 (LP1 located on stack A which was mainly in SOL)

Plans for 2023:

• Nanoindentation of Langmuir probe No. 3.
• FIB cross-sections to assess the grain size in individual zones of LPs.
• More observations on the probes’ sidewalls to try to corelate surface morphology/chemical composition to Per Petersson's IBA results
• XRD measurements (if possible)
• TEM examinations of sub-surface structure
• More SEM observations
• Core sample from Tile 0

6 ISPP_UL activities in 2023: Tritium and composition analysis of JET samples – plans

Speaker: Elina Pajuste (University of Latvia)

ISSP UL activities in 2023.pdf

• ISSP_UL has several techniques for tritium (T) measurements: TDS, full combustion (FC) and dissolution
• Detection of T is based on proportional counter or liquid scintillation
• TDS and FC analysis of samples form HFGC tile completed and agreement is good when results in T amount/g are compared
• Plan for 2023:
  • long term baking of divertor samples from tiles 0 (HFGC) and 1
  •  dissolution/etching of W lamellae samples
  • SEM/EDX analysis of cross sectional samples from tiles 0 and 1 to determine thickness of co-deposited layers
  • FT-IR analysis of louvre clips
• Action for Jari
  • send the cross sectional divertor samples to ISPP_UL
  • send the louvre clips

7 IST activities in 2023: IBA analysis of JET PFCs – plans

Speaker: Norberto Catarino

IST SP E kick-off meeting.pdf

• PFC and side surface of Be samples 788 and 789 from RE damaged IWGL tile analysed with RBS and PIXE
• PIXE showed D, Ni and W deposition on the side surface 
• PFC surface has D, C, O, Ni and W deposition
• Pre- and post-baking analysis has been performed using IBA for samples from HFGC tile exposed either during ILW1-3 or in ILW3

Plans for 2023:

• Analysis of Be bulk samples for baking simulation studies
• Analysis of bulk W samples to compare with TDS
• NDF data analysis for IWGL tile with RE damage
• IBA analysis of core samples from divertor tiles 4, 6, 7 and 8
• IBA analysis  of mirror cassettes (tubes)-TBC

8 NCSRD activities in 2023: IBA analysis of JET PFCs – plans

Speaker: Tassos Lagoyannis

Planning for 2023:

• Micro-beam NRA analysis
• ³He measurements to determine D retention more accurately
• SEM/EDS analysis
• XRD measurements
• TOF ERDA measurements
• Further samples from JET divertor tiles 

9 VR activities in 2023: IBA analysis of JET PFCs – plans

Speaker: M. Rubel/P. Petersson

SPE-VR-Uppsala-KTH-2023-03-14-presentation.pptx

Plan for 2023:

• Divertor samples from tiles 4, 6, 7 and 8 (exposed for ILW2+3)
• Co-deposited layers on these tiles typically very thin so analysis depth of ~350nm should be sufficient on most cases
• Before shipping any core samples discussions needed to determine how many and which samples will be shipped to VR
• Analysis of Langmuir probes using HIERDA
• Analysis of mirror cassettes, baffles and tubes need further discussions because deposition on the tubes installed inside the cassettes had very little deposition during the JET C-wall. Most likely tubes exposed during ILW has even less deposition

10 UKAEA activities in 2023: TDS and microscopy analysis of JET PFCs – plans

Speaker: Yevhen Zayachuk

SPE_kick-off_UKAEA_Zayachuk.pdf

Plans for 2023:

• Shipment of JET PFCs
  • tile 2BNG4C to VTT for Mo migration studies
  • W lamellae sample 106 cut from C2 to IPPLM
  • Additional Langmuir probes removed in 2015- shipments TBC
  • Louvre clips (ILW3)- shipments TBC
  • Mirror cassesttes with baffles and tubes-shipments TBC
• Baking cycle simulations:
  • Continuation of work started in 2022
  • Samples from HFGC, tile 1 and Be limiters (4D14) will be investigated 
  • Aim to anneal to ITER relevant temperatures (350C for divertor and 240C for main wall) for an extended period (~60hours)
  • IBA/SIMS analyses performed before TDS annealing
  • Post-TDS analysis to be performed using IBA/SIMS
  • Final annealing to 1000C using TDS
• Retention in molten Be
  • samples from UDP tile 3A8
  • TDS measurements, comparison with IBA
  • impact of melt damage on retention
• Retention in stack B bulk W lamellae samples
  • TDS measurements
  • toroidal and poloidal comparison with stacks A, C and D performed previously
  • correlation with discharge data (e.g. fluence and temperature) 
• IWGL tile 1XR18 with runaway electron damage
  • IBA analyses at IST and metallographic anlayses at FZJ and IAP

11 Discussion on tasks and identification of gaps

Speaker: All

12 Final remarks and future actions

Speaker: Jari Likonen (VTT)