SP B.1 kick-off meeting 2022

Monday 21 Mar 2022, 11:00 → 14:00 Europe/Berlin

 

https://us02web.zoom.us/j/81661740288?pwd=K3VBanRoaGtEbW5KZVNrazNDSnFIZz09  

Meeting ID: 816 6174 0288

Passcode: 533849

1 Welcome and news from WP PWIE

Speakers: David Douai (CEA), Michael Reinhart (FZJ), Sebastijan Brezinsek (FZJ)

WPPWIE_SPB_Info.pptx

2 Overview of SP B and SP B.2 & SP B.3 in 2022

Speaker: Antti Hakola (TEKES / VTT)

SPB.1_Introduction_Hakola_210322.pdf

3 Erosion studies in MAGNUM-PSI

Speaker: Thomas Morgan (Dutch Institute for Fundamental Energy Research)

WP PWIE SP B 2022 Kick-off meeting DIFFER.pdf

• 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
•  

4 Erosion studies in GyM

Speaker: Andrea Uccello (ENEA)

KoM_2022_SPB1_Uccello.pdf

• 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

5 Erosion studies in PSI-2

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

6 Effective sputtering yields of W model systems

Speaker: Christian Cupak

PWIE-SPB-2022-ÖAW-TUW-Cupak_Kickoff_2203.pdf

• Now focus on oriented samples (nano-columnar W, collaboration w/ UPM Madrid and Uni Helsinki) --> global reduction in sputtering rate seen
• Work started with Ar, next proceed to D
• Maybe extend the scope of the work to study also ENEA samples with various substrate features --> action on Christian and Andrea to organize a meeting
• Wolfgang: microstructure also important for erosion --> EBSD for orientation effects --> action on Christian to consider this

7 Hypervelocity dust impact investigations

Speaker: Dr Marco De Angeli (ENEA-CNR Milan)

KoM SPB_1 Dust ENEA 2022.pdf

• Monodisperse dust impinging on target surfaces --> analysis of craters and making conclusions of their relevance for ITER
• Hypervelocity impact, plastic deformation and sticking --> mutual relevance of each of them
• Experiments almost done, analyses ongoing --> damage law to be extracted as well as estimates for erosion

8 Be and W dust formation during air and water leaks

Speaker: Dr Cristian Lungu

Dust IAP SPB 5.1 March 2022 C Lungu and T Acsente.pdf

• Be dust production: basically milling happening at different conditions (air vs. water)
  • Preliminary results shown
• W dust production: magnetron sputtering for creating the dust particles
  • In 2022 influence of air leaks and humid Ar to be considered during the magnetron phase
• Action to report the results in a systematic manner + make AUG/JET comparison

9 Discussion

10 Final remarks and future actions

Speaker: Antti Hakola (TEKES / VTT)