Few introductory remarks on topical meetings

1
Few introductory remarks on topical meetings
2
System safety review
Presentation to LNGS SC, Oct 14

• Dense schedule of meetings with LNGS and safety
  experts during last six months
• Various documents and studies performed in
  collaboration with external experts (TDR, FMECA,
  HAZOP, TÜV, 2nd opinion, )
• Intense discussions BSK vs. 3rd wall
• Pragmatic conclusion (Sep 5/9 meetings) study of
  feasibility of 3rd wall in close co-operation
  with LNGS and implement if
• ? performance of the experiment not compromised
• ? within financial capabilities of collaboration
• Under study Cu and Lexan
• Safety concept of GERDA accepted by LNGS with
  implementation of 3rd wall

3
Discussion within management team after LNGS SC
meeting

• Proceed with water tank tender submission to INFN
  council in October
• Organize topical meeting on WT/Cryo-tank 3rd
  wall at Tuebingen meeting
• Review WT/CT/3rd wall design
• Make sure that 3rd wall has no impact on physics
  performance
• Make sure that 3rd wall has no/minimal impact on
  WT or CT
• If flaws of design appear, still in time to fix
• If possible, take decision for 3rd wall
  material/design at this meeting
• Move on with maximum speed to start WT and CT
  construction

4
Topical meeting on LAr vs. LN

• LN design based on our experience of radio
  purity, liquid/gas handling, supply chain quality
  control
• LAr considered interesting alternative (?1.4
  g/cm3, bp 10 K above LN, scintillator)
• Review advantages and disadvantages of LAr and LN
  
• ?Do we have all information needed to make
  choice?
• ?If not, come up with to do list
• ?Does design of particular hardware need early
  decision? (e.g. Cryogenic system?)
• ?Is change at later time possible/realistic/needed
  ?