Difference between revisions of "Jul 10, 2012 Readout"

From GlueXWiki
Jump to: navigation, search
(Minutes)
m (Text replacement - "/halldweb1.jlab.org/" to "/halldweb.jlab.org/")
 
(4 intermediate revisions by one other user not shown)
Line 34: Line 34:
 
## Light guides (Iñaki)
 
## Light guides (Iñaki)
 
# Status of testing at JLab
 
# Status of testing at JLab
## [https://halldweb1.jlab.org/elog-halld/SiPM/ Hall-D ELOG].
+
## [https://halldweb.jlab.org/elog-halld/SiPM/ Hall-D ELOG].
 
# [[BCAL Beam Tests 2012]]:
 
# [[BCAL Beam Tests 2012]]:
 
# Status of work at Regina  
 
# Status of work at Regina  
Line 47: Line 47:
 
# Review of Action Items
 
# Review of Action Items
 
# Update from Athens: monitoring
 
# Update from Athens: monitoring
#* Reordered components, expect 3 weeks ARO
+
## Fabrication
#* Digi key small connectors are the pacing items, expect delivery Aug 20
+
##* Reordered components, expect 3 weeks ARO
#* Boards are in hand
+
##* Digi key small connectors are the pacing items, expect delivery Aug 20
#* Flexi-cable cleared today, expect delivery in about 10 days
+
##* Boards are in hand
#* First delivery of cards expected mid Sept.
+
##* Flexi-cable cleared today, expect delivery in about 10 days
 +
##* First delivery of cards expected mid Sept.
 +
## JLab testing
 +
##* Summer student (Tara) has taken many runs at different LED bias voltages. The range of voltages of 4-6.5 V cover the ADC range, which is considerable lower than ranges suggested by Athens. George Voulgaris verified that operating the LEDs at these voltages should be fine. The LED threshold will be about 3.7 V. The data are still under analysis and will be presented in a couple of weeks.
 
# Update from USM
 
# Update from USM
 
## [[Media:USMReport21.pdf|SiPM Update]] (Javiera)
 
## [[Media:USMReport21.pdf|SiPM Update]] (Javiera)
Line 58: Line 61:
 
## [[Media:Working_point_analysis.pdf|Working Point Analysis]] (Orlando)
 
## [[Media:Working_point_analysis.pdf|Working Point Analysis]] (Orlando)
 
##* Summary of pde, gain, pde*gain and amplitude rms/mean distributions shown for several temperatures and sensors as a function of operating voltage.
 
##* Summary of pde, gain, pde*gain and amplitude rms/mean distributions shown for several temperatures and sensors as a function of operating voltage.
 +
##* The rms/mean continues to decrease as a function of over-voltage. No minimum if found for the data plotted.
 
##* Mix of various temperatures will be separated out in to separate plots (Orlando).
 
##* Mix of various temperatures will be separated out in to separate plots (Orlando).
 
##* Understanding of how these relate to the specifications needs to be understood.
 
##* Understanding of how these relate to the specifications needs to be understood.
Line 65: Line 69:
 
##* Pieces on hand show dispersion on the order of 80-100 microns for D type. Dispersion is less, about 20 microns for B type. The D type guides might still meet specifications.
 
##* Pieces on hand show dispersion on the order of 80-100 microns for D type. Dispersion is less, about 20 microns for B type. The D type guides might still meet specifications.
 
##* Iñaki will send JLab list of deviations for all light guides this week.
 
##* Iñaki will send JLab list of deviations for all light guides this week.
 +
##* Tim: Suggest that a table be presented with progress at each stage.
 +
##* Tim: What is the schedule for the first couple of light guide sets. Assuming that the machine part comes in this week, the first sets could be shipped in a couple of weeks.
 
# Status of testing at JLab
 
# Status of testing at JLab
## [https://halldweb1.jlab.org/elog-halld/SiPM/ Hall-D ELOG].
+
## [https://halldweb.jlab.org/elog-halld/SiPM/ Hall-D ELOG].
 +
##* Yi is working with summer student Ben St. Laurent on analyzing the data.
 +
##* 1050 production units tested at 15 degC. Good agreement with Hamamatsu data. (More have been tested as part of the first article).
 +
##* To date one unit that fails specs has been found.
 +
##* Data has been taken to investigate cross talk and after pulsing at different voltages. These data should allow determination of the optimal operating point for the SiPMs.
 +
##* Ben will present a summary in a couple of weeks.
 +
## Will: Is it possible to operate the SiPMs at 15 degC in the experiment. Elton: Yes, before irradiation, the dark count  is acceptable.
 
# [[BCAL Beam Tests 2012]]:
 
# [[BCAL Beam Tests 2012]]:
 
# Status of work at Regina  
 
# Status of work at Regina  
 +
#* Cosmic-rays are setup at UofR, considering reconfiguring the DAQ.
 +
#* Cosmics have been collected at Vover=0.9V and now taking data at Vover=1.2 V.
 +
#* Planning to add amplification to be able to measure timing resolutions with cosmics
 
## Simulations
 
## Simulations
 
## BCAL Cosmics at Regina
 
## BCAL Cosmics at Regina
 
# Other
 
# Other

Latest revision as of 03:04, 1 April 2015

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
    • Investigate the optimum overbias setting for the SiPMs (Serguei and Orlando)
  2. Monitoring
    • Check on payment for first article delivery (Elton) Payment has been made

Presentations from recent meetings

Tentative Agenda

  1. Announcements
  2. Review of Action Items
  3. Update from Athens: monitoring
  4. Update from USM
    1. SiPM Update (Javiera)
    2. Working Point Analysis (Orlando)
    3. Light guides (Iñaki)
  5. Status of testing at JLab
    1. Hall-D ELOG.
  6. BCAL Beam Tests 2012:
  7. Status of work at Regina
    1. Simulations
    2. BCAL Cosmics at Regina
  8. Other

Minutes

Attending:Elton, John, Zisis, Shaun, Tara, Eugene, Yi, Tim (Jlab); Will, Javiera, Orlando, Hayk, Iñaki (Jlab); Christina, Stratos, George (Athens).

  1. Announcements
  2. Review of Action Items
  3. Update from Athens: monitoring
    1. Fabrication
      • Reordered components, expect 3 weeks ARO
      • Digi key small connectors are the pacing items, expect delivery Aug 20
      • Boards are in hand
      • Flexi-cable cleared today, expect delivery in about 10 days
      • First delivery of cards expected mid Sept.
    2. JLab testing
      • Summer student (Tara) has taken many runs at different LED bias voltages. The range of voltages of 4-6.5 V cover the ADC range, which is considerable lower than ranges suggested by Athens. George Voulgaris verified that operating the LEDs at these voltages should be fine. The LED threshold will be about 3.7 V. The data are still under analysis and will be presented in a couple of weeks.
  4. Update from USM
    1. SiPM Update (Javiera)
      • 1800 MPPCs stage 1, 1600 MPPCs stage 3, 1300 MPPCs stage 2. Have measured 80 extra units in stage 2.
      • 5th delivery from Hamamatsu delayed, expected next week.
    2. Working Point Analysis (Orlando)
      • Summary of pde, gain, pde*gain and amplitude rms/mean distributions shown for several temperatures and sensors as a function of operating voltage.
      • The rms/mean continues to decrease as a function of over-voltage. No minimum if found for the data plotted.
      • Mix of various temperatures will be separated out in to separate plots (Orlando).
      • Understanding of how these relate to the specifications needs to be understood.
    3. Light guides (Iñaki)
      • Waiting on spare parts for machine, expected this week
      • Once in hand, the part will be exchange and recalibrated
      • Pieces on hand show dispersion on the order of 80-100 microns for D type. Dispersion is less, about 20 microns for B type. The D type guides might still meet specifications.
      • Iñaki will send JLab list of deviations for all light guides this week.
      • Tim: Suggest that a table be presented with progress at each stage.
      • Tim: What is the schedule for the first couple of light guide sets. Assuming that the machine part comes in this week, the first sets could be shipped in a couple of weeks.
  5. Status of testing at JLab
    1. Hall-D ELOG.
      • Yi is working with summer student Ben St. Laurent on analyzing the data.
      • 1050 production units tested at 15 degC. Good agreement with Hamamatsu data. (More have been tested as part of the first article).
      • To date one unit that fails specs has been found.
      • Data has been taken to investigate cross talk and after pulsing at different voltages. These data should allow determination of the optimal operating point for the SiPMs.
      • Ben will present a summary in a couple of weeks.
    2. Will: Is it possible to operate the SiPMs at 15 degC in the experiment. Elton: Yes, before irradiation, the dark count is acceptable.
  6. BCAL Beam Tests 2012:
  7. Status of work at Regina
    • Cosmic-rays are setup at UofR, considering reconfiguring the DAQ.
    • Cosmics have been collected at Vover=0.9V and now taking data at Vover=1.2 V.
    • Planning to add amplification to be able to measure timing resolutions with cosmics
    1. Simulations
    2. BCAL Cosmics at Regina
  8. Other