Time: 8am PT/11am ET/5pm CET

Zoom link: https://uzh.zoom.us/j/5166204490?pwd=VUt1VmFLVmJsYTExeXJka0JwbUlIQT09

Attendance:

Agenda:

• Update sims Alex
• Discussion of technical aspects (dimensions, thermal considerations) for Oxford technical report
  • HEMPS will double the head load, interface with Julien for heat load constraints
  • Emma working on two things:
    • Gordon shared the vibration decoupler design with Emma
    • Updating how the load support is handled
  • AK, BP: Ask load distribution design of Oxford
  • Emma:
    • Preliminary cold joint design, needs to be signed off by Julien
    • Still canister closed, the rest can be open
    • Bottom canister discussion
  • Active veto discussion, shift the weight of the veto off the scale to the mixing chamber
    • need to ask manufacturers

• Andrey: slides
  • Need sheet thickness of PE sheets, 10cm would be good
  • Need some sheets
  • Need to ask French colleagues what the maximum weight

Agenda:

• Alex - Ancient Lead Sims
  • It seems only a few hundred kg of ancient Pb, not all Edelweis is low in Pb210
  • Changing inner Pb layer has rather small effect compared to clean Cu
  • Estimate impact of cryogenic cooper as function of wall thickness
  • Check dimensions from drawings and double check both dimension
  • Andrey will send step file of complete assembly

• Emma - Thermal Modeling Update
  • Thermal contraction modelling:
    • Neck will not displace more than 0.2mm
    • Upper and payload cannister both less than 1mm
    • Vertical displacement up to 4mm
    • Note from comment: all flanges deflection less than 1mm
    • Mixing chamber heatloads can be well controlled
    • HEMTs on the CP, their heat loads are high, can lead to large heat loads exceeding 50mk
      • We need to check with Julie
• Cryo CDR
• AOB