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Minutes of the forward endcap EMC Vibe/eZuce meeting, 16th of August 2019, 14:00-14:50

Presence:

  • Basel: -
  • Bochum: Matthias, Thorsten, Tom
  • Bonn: Christoph, Christian
  • Groningen: -
  • Stockholm: -
  • Uppsala: Pawel
  • Giessen: -
  • GSI: -

APD-Submodules:

  • Cosmics measurment results of the first 16-crystal APD submodule:
    • The 12 GeV Panda FWEC EMC single crystal energy maximum is obviously detetcable with all channels (detailed analysis follows)
    • The spread of channel responses (inter crystal and between APDs on one crystal) is as expected and acceptable
    • Second APD submodule is going to cosmics test stand soon
    • Noise figures of both submodules comparable in terms of sigma, but a closer look to the shape (non guassian contribution) is needed as this indicates the occurance of pickup noise
  • Annealing LED cabling appears to be short (probably not too short but close to limit) - does this come from cable routing through the aluminum tube (as tested for one of the two submodules built)?
  • The signal labeling/color coding should be improved: ideal would be an omission of the shrinking tube as it hinders cabling to the PCB and preferred is a labeling that does not move along the signal cable
  • We therefore will change to the newly tested paper cable labels that we print on out own and that include the color coding by colored prints

-- ThomasHeld - 27 Aug 2019
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Topic revision: r1 - 27 Aug 2019, ThomasHeld
 
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