Straw bi-weekly meeting

Tuesday 5 Aug 2025, 09:00 → 10:00 Europe/Zurich

Hans Danielsson (CERN)

To be followed-up:

• vacuum vessel recovery
• gas connection (long proto): L-shaped connector, position on the side of the manifold
• material of spacers
• HV and RO boards wrt straw layout
  • make them rounded to have more space on the sides 
  • only read out a "cross" of straws - gain space in the corners
• gas manifold material
• how to ensure planarity of HV and FE boards
• how to guide the support tube in the vacuum vessel
• guides or rails for turning the supporting tube in the vacuum vessel
• alignment and positioning of the support tube wrt vacuum vessel
• tooling
• if we had long straws, should we equip the intermediate prototype first?

1 Updates

Speaker: straw-proto-wg

Update-August19.pdf

Update-August19.pptx

Short prototype:

Zuzana:

• ultem and brass pieces machined, will be delivered to apropriate labs for metalization this afternoon
• thorough review of drawings has begun

 

Peter:

• solution to bring HV connection outside - produce new PCB

 

Intermediate prototype:

Zuzana:

• researching companies to manufacture ultem and brass pieces for straw HV connection
• waiting for Minitubes crimp tubes (delivery probably delayed due to company being closed until August 18)

 

Long prototype:

Zuzana:

• recovery of the vacuum vessel has begun

 

Peter:

• RO side: plastic pin in the center of the flange to ensure planarity of the HV board
• gas manifold should be made of Optalloy
• very limited space for electronics in the corners and on the sides
• Spacers: due to cross-talk, it is better to use glass fiber - kapton sandwich

 

Vincent:

• added ball bearings to the support tube