====== Engineering Meeting Nov 05, 2024 ======

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: [[https://docs.google.com/presentation/d/1Uib-TNOytESU4InSWOHYdYiQsu0Fz9HPgITLHwsDJbw/edit?usp=drive_link|slides]]
      * Need sheet thickness of PE sheets, 10cm would be good
      * Need some sheets
      * Need to ask French colleagues what the maximum weight 

== last time ==

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