Mar 13, 2012 Calorimetry

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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+Canada
    • +1-303-248-0285 : International
    • then enter participant code: 3421244# (remember the "#").
    • or www.readytalk.com (and code without the #)

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(s)

  1. Monitoring
    • Send additional SiPMs to Athens for tests (Elton). Shipment has been prepared and permission from DOE has been granted

Tentative Agenda

  1. Announcements
  2. Review of Action Items
  3. Monitoring
  4. Calibration of Calorimeters
  5. FCAL
    1. Construction Status
    2. 2011 Hall B FCAL Beam Test (John)
  6. BCAL
    1. BCAL Beam Tests 2012
    2. SiPM Database (Yi)
  7. USM update
    1. Production Manager Report (Javiera)
    2. Stage 3 update (Alam)
    3. Update on lightguide production (Iñaki)
  8. TDR update
    1. Instructions for the TDR (You must be logged into the wiki to access this page).
    2. We need to start revising Chapter 4 Detector, Section 4.3 Calorimetry.
  9. Simulations/Reconstruction
    1. Status of Sampling Table Generation (Andrei and Irina)
  10. Any other business

Minutes

Attending: Elton, Beni, John, Tim, David, Eugene (JLab); Will, Iñaki, Sergei, Alam, Javiera (USM); Christina, Pavols, George, Stratos (Athens); Zisis, Andrei (UofR)

  1. Announcements
    • U of R is preparing for a celebration of the completion of the Bcal modules on March 23 10-11:30 am. Federal and Provincial representatives will be present, press, university officials will participate. Claus Rode and Eugene will represent JLab. They will have two prototypes on display. The CBC filmed a 2min documentary, which is available online. Students that have contributed to the project have been invited and will be treated to dinner.
  2. Review of Action Items
  3. Monitoring
    • Bcal LED boards arrived at JLab in time to be installed into the mini-Bcal
    • One control board will be shipped out tomorrow
    • Second control board has been ordered, but has not yet arrived. Will ship when ready
    • Clarified connections to control board: +5V, +Bias (typical 8-10 V up to 13 V), trigger signal (TTL +5V 100 ns long, up to 60 KHz repetition rate)
    • Four SiPM and compact sum electronic boards are ready to be shipped. George requested that we hold off until they clear all necessary custom paperwork on their end.
  4. Calibration of Calorimeters
    • Will schedule a special opportunity to discuss calibration in preparation for the software review
  5. FCAL (Kei filling in for Matt)
    1. Construction Status
      • Testing pmts continues at a routine pace, 50% complete
      • No update on the Cockcroft Walton bases since Matt and Paul visited the company
    2. 2011 Hall B FCAL Beam Test (John)
      • New target is being installed in Hall B this week and the hall is open
      • Common Hall B tagger/Fcal data will be taken soon after beam comes back on Thu
      • The present plan for the accelerator is to run 5 pass now and go back to 3 pass opportunistically
  6. BCAL
    1. BCAL Beam Tests 2012
    2. SiPM Database (Yi)
      • Following Yi's announcement of the JLab DB, Javiera got access to the wiki from Mark Ito. Ricardo, the DB expert, will upload information in the next few days. He is currently busy analyzing the stage 3 production data.
  7. USM update
    1. Production Manager Report (Javiera)
      • PDEs from 40 MPPCs has been completed in the stage 2
      • Responding to questions from previous meetings, Javiera and Remski checked the tail for the station 2 setup and found that it died quickly, did not have a long component. There is a visible DC offset leading to 100nA before amplification and about 7 microA after amplification.
      • Four SiPMs will be taken as references during measurements in stage 3. There will be one reference in each of the 4 rows (arrangement is 4x8 array). Systematics of illumination/uniformity of response is still under study. The uniformity is better for the top rows.
      • First set of production data has been taken in stage 3. Data is currently being analyzed
      • Additional personnel has been hired to cover additional shifts in stage 3
      • One shift per day is scheduled in stage 3 until all personnel is trained. Expect to go to two shifts next week
      • Sergei: Special pedestal runs with various length gates (up to 1 micros) were taken and the data shown.
      • The data seem to show only pedestal, increasing in width and mean for longer gates. It is unclear why the single p.e. peak is not more pronounced for longer gates.
      • The 1 micros gate data will be added as a routine data set during tests.
    2. Stage 3 update (Alam)
    3. Update on lightguide production (Iñaki)
  8. TDR update
    1. Instructions for the TDR (You must be logged into the wiki to access this page).
    2. We need to start revising Chapter 4 Detector, Section 4.3 Calorimetry.
  9. Simulations/Reconstruction
    1. Status of Sampling Table Generation (Andrei and Irina)
    2. See BCAL Readout Segmentation Task group Meeting: Aug 19, 2011 for background (especially slides 6-8).
    3. A large number of MC data sets have been collected to compare simulations with the "full" geometry to the "homogeneous" geometry.
    4. The full geometry simulations take an order of magnitude more time than the homogeneous geometry.
    5. Analysis of the data is underway to parameterize the differences so that they can be applied as corrections to the standard Hall D simulations.
    6. It was decided to find a dedicated time to go over the goals, plans and procedures for determining the realistic response of the calorimeter.
  10. Any other business