SP B.1 Kick-Off Meeting

Name: SP B.1 Kick-Off Meeting
Start: 2021-06-09T00:05:00+02:00
End: 2021-06-09T12:15:00+02:00
Location: No location set

Wednesday 9 Jun 2021, 00:05 → 12:15 Europe/Berlin

- 1
  
  Welcome and introduction to WP PWIE
  
  Speaker: Sebastijan Brezinsek
- 2
  
  Overview of SP B and SP B.1 in 2021
  
  Speaker: Antti Hakola
  
  SPB.1_Introduction_Hakola_090621.pdf
- 3
  DIFFER activities in 2021: Erosion rates of W model systems in MAGNUM-PSI – plans and capabilities
  
  Speaker: Tom Morgan
  
  SPB.1_DIFFER_Morgan_090621.pdf
  Low-T_e/high-n_e D plasmas in MAGNUM-PSI --> influence of seeding impurities, are they entrained in the plasma beam, and what happens to eroded W in MAGNUM-PSI conditions?
  
  Target, witness plate and insulator next to each other --> QCM and spectrocopy for gross erosion, RBS and XRF, NRA, TDS for post exposure analyses
  
  Sebastijan: witness plate could have a marker layer, maybe markers also on the insulator
  
  Marek: but markers may change thermomechanical properties? However, multiple samples so some may have marker layers, some not
  
  Per: implantation as a marker? Or FIB cuts --> collaboration with FZJ!
- 4
  ENEA activities in 2021: Effective sputtering yields of W model systems in GyM – plans and capabilities
  
  Speaker: Andrea Uccello
  
  SPB.1_ENEA_Uccello_090621.pdf
  GyM experiments: low T_i and flux 10²¹, manipulator system for exposing 4 samples simultaneously --> W model systems with varying morphologies (columnar and porous layers by PLD, also Laura's W-graphene heterostructures, also similar roughness samples as those produced for PFC)
  
  First experiments foreseen in He --> morphology evolution as well as data for simulation efforts (in SP D)
  
  Spectroscopy, weighing, SEM, AFM, QCM --> anything else?
  
  Marek and Sebastijan: motivation for the work? in reactor we know that instead of nice and shiny pure W, we will have something else, including impurities and evolving morphologies; how about some witness/catch-up plates --> deposited material; think also about FIB cuts
  
  Ion-beam analyses, also TEM analyses of relevant meshes missing --> Action on AH
- 5
  ENEA activities in 2021: Hypervelocity dust impacts – plans and capabilities
  
  Speaker: Marco de Angeli
  
  SPB.1_ENEA_deAngeli_090621.pdf
  Erosion by hypervelocity dust impacts, observed in FTU --> dust-gun system will be applied, W dust already ordered
  
  Hypervelocity dust occur from runaways, DEMO-relevant but this may not be an issue for ITER/JET (where Be first wall) --> scoping studies in 2021
  
  Morphology studies in the first place, maybe collaboration with IPPLM --> action on AH
- 6
  FZJ activities in 2021: Erosion rates of W model systems in PSI-2 - plans and capabilities
  
  Speaker: Oleksandr Marchuk
  
  SPB.1_FZJ_Marchuk_090621.pdf
  PSI-2 experiments --> erosion/re-deposition of W (poly and single crystalline), using spectroscopy
  
  Sputtering of W, re-deposition on witness plates (Mo, Ta), different geometries (big vs. small targets and catchers) foreseen as well as roughness levels
- 7
  ÖAW activities in 2021: Effective sputtering yields of W model systems – plans and capabilities
  
  Speaker: Christian Cupak
  
  SPB.1_OEAW_Cupak_090621.pdf
  Collaboration with VR, samples with W coatings on top, lab system with an ion source and QCM; catcher system recently upgraded to be usable for both erosion and deposition studies
  
  #1: create and characterize re-deposited layers, #2: experiments on W, #3: experiments on W with re-deposits
  
  Sebastijan: how rough surfaces can be modelled using SPRAY? Depends on the geometry! Recommendation to connect to other codes under SP D.
- 8
  VR activities in 2021: Characterization of samples from laboratory erosion and dust experiments – plans and capabilities
  
  Speaker: Daniel Primetzhofer
  
  SPB.1_VR_Primetzhofer_090621.pdf
  Ion beam analyses --> collaboration with ÖAW and ENEA; ENEA side mainly related to the dust samples (if needed)
  
  RBS, TOF-ERDA, PIXE, NRA (but focus not so much on retention here); MEIS and LEIS available
  
  Sebastijan: analysis capabilities table to be updated --> action on AH (also size, weight, Be, radioactive materials capabilities) --> together with Jari
  
  Sebastijan: isotope-enriched W, can isotopes be distinguished? Quite tough, mainly AMS or SIMS are left! How about micro-NRA resolution? a few microns, typical system
- 9
  IAP activities in 2021: Be and W dust formed during air and water leaks – plans and capabilities
  
  Speaker: Cristian Lungu
  
  SPB.1_IAP_Lungu_090621.pdf
  Lungu for Be dust, Acsente for W dust; target to characterize dust properties in off-normal conditions (water or air leaks)
  
  Analysis tools: EDX, SEM, XPS, TDS; 2021 target is to increase H₂ content (W dust part)
  
  Marek: what has the produced dust to do with tokamaks? Try to mimic what has been created in JET (publications pending!) --> discharges to be brought closer to fusion-reactor conditions
- 10
  Discussion on tasks and identification of gaps
  Francesco: where to place catcher plates for dust in GyM? Consult modellers for most suitable places!
  
  Francesco: surface roughness important, to be fully analyzed, single parameter not enough (also an issue for tokamak samples)
  
  Marcin: FIB markers --> organize a separate meeting --> action on AH
  
  Dina: can assist with ion-beam analyses of GyM samples --> action on AH
- 11
  
  Needs for analyses/measurements in other labs