Difference: Minutes2016-05-23 (1 vs. 2)

Revision 2
24 May 2016 - Main.ThomasHeld
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META TOPICPARENT name="ForwardEndcapMeetings"

Minutes of the forward endcap EMC SeeVogh meeting, 23rd of May 2016, 14:00-15:00

Presence:

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  • In this context there was some confusion about the grounding layout of the different ISEG HV power suppliy versions: the 16 channel units are not channel wise floating as the 8 channel and VPTT units but have a floating ground common to all 16 channels!
  • Delivery of the VPTT preamps is delayed by about four weeks. They are expected to arrive end of June.

Read out electronics:

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  • There was some discussion about the definition of thresholds: Malte and Matthias remarked that.......
  • Myroslav will report on the triggering mechanism in the KVI-firmware in detail on the upcoming GSI-Meeting in June
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  • There was some discussion about the definition of thresholds:
    • Malte and Matthias remarked that the effective threshold is not the stated threshold as there are additional requirements to be fulfilled, i.e. a time over threshold constraint, before accepting a signal, effectively increasing threshold
    • Myroslav explained that the difference in thresholds is not that dramatic
    • He will report on the triggering mechanism in the KVI-firmware in detail on the upcoming GSI-Meeting in June
 
  • The four shaper versions have been tested:
    • There is a ringing in the high gain branches causing double peaking spectra
    • The factor between high and low gain branch is clearly lower than 16
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    • Linearity test with six different amplitudes done (okay)
  • Malte will prepare a brief report on this measurements and send it around

HV regulation:

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  • Christoph presented some slides showing the integration of the HV regulation board to the patch panel board (sitting on top as piggy back board)
  • The HV regulation boards also acts as security lock for the signal U.FL connectors
  • A mock-up for installation feasibility test may be available the week after next week
  • A real version of the fully equipped HV regulation board will arrive at Bonn soon, tested there and then go to irradiation tests to Giessen
 

-- ThomasHeld - 24 May 2016
 
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