Same set of slides as in 2021: focus on the role of impurities in W erosion --> confirming modelling predictions and to see how different mechanisms influence re-deposition
Small target, surrounded by insulator with a high thermal conductivity --> measurements of witness plates (not directly facing the beam) and actual targets
Experiments most likely in June 2022 (if no further delays), also including FIB marker cuts
Samples: W coatings on graphite and Si (with varying features by etching) + polished bulk W
Experiments: 5 different ion energies at fixed He fluence --> data for modelling benchmarking
Update: FIB samples ready, substrates with different features ready, deposition of W coatings to happen in March-April
First results should be available already early summer; propose to apply "parallel strategy" so exposure of FIB markers and coatings in parallel
11:35
→
11:45
Erosion studies in PSI-210m
Speaker:
Oleksandr Marchuk(FZJ)
Recap of the different line shapes for W emission from W samples with varying crystallinity but no differences in erosion rates
Modelling of the profiles still ongoing
Plans for 2022: Ne vs. Ar comparison, require to some extent new manipulator to continue studies --> timescale to have new set of results by the time of the midterm meeting