Difference between revisions of "May 29, 2012 Readout"

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(Tentative Agenda)
(Tentative Agenda)
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# Status of Testing at JLab
 
# Status of Testing at JLab
 
## [https://halldweb1.jlab.org/elog-halld/SiPM/ Hall-D ELOG].
 
## [https://halldweb1.jlab.org/elog-halld/SiPM/ Hall-D ELOG].
# [[BCAL Beam Tests 2012]]
+
# [[BCAL Beam Tests 2012]]
 +
## [https://mailman.jlab.org/pipermail/halld-cal/2012-May/000588.html | e-mail regarding amplification]
 
## Decision on configuration for electronic boards for the next iteration. Note that gain adjustments can be made after the boards are stuffed
 
## Decision on configuration for electronic boards for the next iteration. Note that gain adjustments can be made after the boards are stuffed
 
## All feedback from the beamtest is going into the new iteration of boards including wider ground traces, adjustments for the extraction of heat from the chips on the board, and simplification of assembly.
 
## All feedback from the beamtest is going into the new iteration of boards including wider ground traces, adjustments for the extraction of heat from the chips on the board, and simplification of assembly.

Revision as of 07:25, 29 May 2012

Teleconference Time: 11:00 a.m. EST

  • ESNET (Number is 8542553) and EVO session (GlueX Calorimetry meeting room)
  • Phone connection only upon request.
    • +1-866-740-1260 : US and Canada
    • +1-303-248-0285 : International
    • then use participant code: 3421244# (the # is needed when using the phone)
    • OR from www.readytalk.com type access code 3421244 into "join a meeting" without the # (you need java plugin)

Participant Direct Lines

  • JLab Phone: in CC F326 is 757-269-6337 (usual room)
  • JLab Phone in CC L207 is 757-269-7084
  • Phone in the Regina Videoconference Suite is 306-585-4204
  • Athens Phone: in Christina's office is 011-30-210-727-6947

Items for followup from previous meeting

  1. SiPMs
    • Plot dark rate of SiPM measurements extrapolated to 25deg C as for Hamamatsu data (Orlando and Serguei)

Presentations from recent meetings

Tentative Agenda

  1. Announcements
  2. Review of Action Items
  3. Update on monitoring (Athens)
  4. Update from USM
  5. Status of Testing at JLab
    1. Hall-D ELOG.
  6. BCAL Beam Tests 2012
    1. | e-mail regarding amplification
    2. Decision on configuration for electronic boards for the next iteration. Note that gain adjustments can be made after the boards are stuffed
    3. All feedback from the beamtest is going into the new iteration of boards including wider ground traces, adjustments for the extraction of heat from the chips on the board, and simplification of assembly.
    4. Bias configuration. We will make two mirror versions of the board, one for upstream and the other for downstream. We call this the mirror configuration, where bias 1 on the upstream feeds the opposite SiPMs and bias 1 downstream. Andrei suggested that one more bias be added to the board to allow entire rows to be powered at one time. Due to the increase cost in power supplies and design effort to change the board, we will go with the mirror solution. Note that this configuration will require more data to be collected when single cells are powered
    5. Gain of pre-amplifier. Elton suggested to set the nominal bias to Vover=1.2 V. With this configuration, the electronic gain is to be reduced by a factor of 2.5.
    6. Keep the latest TDC gain of x5 relative to the fADC gain.
    7. Zisis has a list of homework tasks to be worked on while the boards are manufactured and stuffed (about 3 weeks). Changes to the gain and
  7. Other

Minutes

Attending: