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    AWAKE spectrometer meeting

    → Europe/Zurich
    1/1-025 (CERN)

    1/1-025

    CERN

    20
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    Minutes of AWAKE spectrometer meeting - 15/Dec/2016

    Present: Fearghus, Lawrence, Matthew, Michele, Simon, Stefano


    Stefano

    - See slides
      - Presented first ideas on support designs.
      - Presented first ideas on mount designs.
        - ESO people recommended to minimise metallic support area glued to glass.  The design was therefore adapted according to this.
        -> Need additional support (to the three on the back) from the side due to an angle of the mirror to the floor.

      - Mirror sample tests. 
        - Stefano will collect the mirrors next week.
        -> Thomas Schneider to analyse them in mid-January.

      - Ordering mirrors: order uncoated and then coat, protected or unprotected, as needed. 
      - The coating can then be done in CERN at a lower costs.     
      -> All agreed with this and so the orders can be placed.
      - Quotes from three companies are in.  For 3 big (~9k each) + 2 small (~6k each) total is ~ 40 kEUR.
      - The three quotes will be given to CERN purchasing and they will go with the cheapest.
     -> Decide to order 4 big + 2 small mirrors, i.e. ~ 50 kEUR.

     - Optical table arrived in CERN.  Since decided that it will be transported to final position and kept packed.

     -> Note that came up in discussion: due to mirror positions, the screen image is not completely horizontal at camera, so will tilt camera to have horizontal.
     

    Lawrence

    - Scintillator screen
      - The company is waiting on delivery of phosphor.
        -> To phone up and ask about why process went wrong.
      - Can CERN cut the screen to the right dimensions ?
        -> Stefano to ask and Fearghus to find data sheet so can check any safety concerns.
      - Another company (DMZ) makes these screens.
        -> Lawrence to ask for a quote.

    - Filter
      - Holder is a strange size.
      -> Stefano can order mount; Lawrence to pass on details.  Semrock has many options.

    - Water cooler: still waiting for quote.


    Michele

    - In discussion with Stefano on UPS.


    Simon

    - Light-tight enclosure.
      -> Fearghus still needs CAD drawings.
      -> Stefano to follow up switching off / on lights and light-tight path from mirror 3 to camera with Bart.
      - People in the workshop are thinking about blinkers / covers.
      -> Need more discussions about what to do in the linking tunnel.


    Next meeting: Tuesday 17 January at 11:00 / 12:00 (UK / CERN time).

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