Difference: Minutes2016-09-26 (1 vs. 3)

Revision 3
27 Sep 2016 - Main.ThomasHeld
Line: 1 to 1
 
META TOPICPARENT name="ForwardEndcapMeetings"

Minutes of the forward endcap EMC eZuce SRN meeting, 26th of September 2016, 14:00-15:00

Presence:

Line: 26 to 26
 
  • Order of manufacturing: offers from possible manufacturers awaited, tendering process started
  • Myroslav: will there be test pieces manufactured before production of full batch? Pawel: 1-2 test pieces
  • Malte: How much time left to decide on shaper stage values? Pawel: 5-6 months
Changed:
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  • Bochum will start work on shaper stage tests: simulation of pulses (charge injection to Basel preamp)
-- ThomasHeld - 26 Sep 2016
>
>
  • Bochum will start work on shaper stage tests: simulation of pulses (charge injection to Basel preamp) with rise time variation according to what is seen on cosmics events

Bonn Cosmics Setup:

  • The test subunit equipped with two crystals with two APDs each, glued with primer treated crystal surface and equipped with latest Basel preamp version works fine
  • Waiting for preamp output signal amplitudes resulting form vertically crossing muons in the crystals to confirm necessary APD preamp gain

-- ThomasHeld - 26 Sep 2016
Revision 2
27 Sep 2016 - Main.ThomasHeld
Line: 1 to 1
 
META TOPICPARENT name="ForwardEndcapMeetings"

Minutes of the forward endcap EMC eZuce SRN meeting, 26th of September 2016, 14:00-15:00

Presence:

Line: 19 to 19
 
  • The unsolved glueing problem still prevents us from starting subunit manufacturing
  • Some discussion with the Giessen colleagues last week: We will try their glueing technique (no vacuumizing of glue, high pressure curing instead) with our crystals and compare the coupling strengths
  • Much improvement comes from usage of special primer before glueing. Need to test for transparency and radiation hardness (Giessen)
Changed:
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<

>
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VPTTs:

  • 150 units still need to be B-field gain loss measured. This will start soon and is expected to last 2 weeks.
  • About the same number of tubes needs to be gain measured with 1000 V supply voltage in Bochum. Some of the tubes currently located in Bonn (need to check...). Measurement setup is in preparation...

ADC boards:

  • Order of manufacturing: offers from possible manufacturers awaited, tendering process started
  • Myroslav: will there be test pieces manufactured before production of full batch? Pawel: 1-2 test pieces
  • Malte: How much time left to decide on shaper stage values? Pawel: 5-6 months
  • Bochum will start work on shaper stage tests: simulation of pulses (charge injection to Basel preamp)
 
-- ThomasHeld - 26 Sep 2016
 
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