Difference: Minutes2015-01-19 (1 vs. 3)

Revision 3
23 Jan 2015 - Main.FritzHerbertHeinsius
Line: 1 to 1
 
META TOPICPARENT name="ForwardEndcapMeetings"

Minutes of the forward endcap EMC meeting, 19th of January 2015, SeeVogh, 14:00-15:45

Line: 19 to 19
 
  • Gain will be optimized for 2.2 V maximum amplitude
  • Werner: Production of preamps takes 3-4 month.
  • Basel will start with production of "medium" gain preamps, once gain is defined
Changed:
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  • APD preamp: no news from Bochum concerning test of ringing for preamp with increased gain (Action: Bochum)
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  • APD preamp: no news from Bochum concerning test of ringing for special APD preamp with increased gain compared to preamps with reduced gain (Action: Bochum)
 

Shaper and ADC
  • Matthias tested shaper based on KVI design, as currently implemented in the ADC.
Revision 2
22 Jan 2015 - Main.FritzHerbertHeinsius
Line: 1 to 1
 
META TOPICPARENT name="ForwardEndcapMeetings"

Minutes of the forward endcap EMC meeting, 19th of January 2015, SeeVogh, 14:00-15:45

Line: 28 to 28
 
    • Suggestion to design two different boards, one optimized for endcap and Basel preamp (single ended 50 Ohm dual gain and shaping), one optimized for ASIC (differential, single gain, no shaping) and required barrel form factor.
    • There is some DC coupling, which causes an amplitude dependance on the baseline (some %)
  • Action Myroslav: Check effect of base line shifts on amplitude.
Changed:
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  • Action Pawel: Optimize shaper/filter for 2.2 V input with Basel preamplifier. Check maximum input from ASIC.
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>
  • Action Pawel: Optimize shaper/filter for 2.2 V input with Basel preamplifier (Note from Matthias after meeting: damping in signal cable will slightly reduce the maximum amplitude). Check maximum input from ASIC.
 
  • Pawel: ADC PCB are in production. Assembly starts soon.
    • 2 for Mainz, 2 for Giessen (64 ASIC inputs)
    • 1 for KVI: 16 linear inputs, 16 shaper inputs (optimized for Basel preamp)
Line: 53 to 53
 
  • Bochum: APD and VPTT alveole dismounted. Pbs with gluing of some APDs. To be investigated.
  • VPTT Alveole will be transported to Bonn for test setup
Changed:
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-- FritzHerbertHeinsius - 21 Jan 2015
>
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-- FritzHerbertHeinsius - 22 Jan 2015
 
  • Preamp 0.5V/pC output for VPTTs @12GeV, 1kV and 0.88T:
    preamp_output.png
 
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