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Minutes of the forward endcap EMC meeting, 13th of April 2015, SeeVogh, 15:15-16:05

Topics are not in the order of discussion, but by subject.

Presence
  • Basel: Werner
  • Bochum: Cathrina, Claudius, Fritz-Herbert, Malte, Mario, Matthias, Miriam, Ronja, Tobias H., Tobias T.
  • Bonn: Christoph, Ulrike
  • Groningen: -
  • Uppsala: -
  • GSI: -

Mechanics workshop 27/28.4. at GSI
  • Tentative schedule of talks (Fritz-Herbert will contact Lars):
    • Christoph: Status of cable orders, open points for final orders, delivery times etc.
    • Claudius: Cable routing outside of forward endcap, plans for holes in magnet, space for cooling (mixer box), crate positions
    • Fritz-Herbert: Mounting of forward endcap (rails etc.)

Mechanics
  • Plans for spare alveoli: 214 full plus 20 spare, 54 half plus 6 spare.

FEE/DAQ workshop
  • Tobias T. reports briefly:
    • Sodanet not yet functional, intermediate step Soda-net with point to point connections
    • Manpower problem for prototype DAQ, only Milan Wagner remaining.
    • Status of new SADC?
    • Hardware for DAQ on hold, waiting for next FPGA generation. Delays software developments and tests.

Preamplifier
  • Tom: Two new VPTT preamps tested
    • 0.5 pF version -> rel. gain 2.16
    • 0.4 pF version -> rel. gain 2.61 is too high, not needed.
  • Werner: Only modification by 0.1 pF possible (5% capacitors) or use e.g. 0.56 pF (10% tolerance)
  • Decision: try gain with 0.6 pF, 0.7 pF 0.56 pF? Tobias H. will mail Werner details.
  • Werner: 4 month delivery time for capacitors. Decision: order various capacitors to have them available for production.
  • Tom: new APD preamp unstable below -20 degree.
  • Werner: will produce one version with a little higher gain and another with different parts.

AOT
  • Tobias H.: Replacement for defekt VPTT received from Hamamatsu.

-- FritzHerbertHeinsius - 13 Apr 2015
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Topic revision: r1 - 13 Apr 2015, FritzHerbertHeinsius
 
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