Difference between revisions of "Jan 17, 2012 Calorimetry"

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# Review of Action Items
 
# Review of Action Items
 
# Monitoring.
 
# Monitoring.
−
# Beam tests in Hall B (fall 2011) (John)
+
#* [https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=1891 First Results with UV LEDS]
 
# FCAL
 
# FCAL
 
## Construction Status: mechanical, bases (notes from Matt)
 
## Construction Status: mechanical, bases (notes from Matt)
 +
## Beam tests in Hall B (John)
 
# BCAL
 
# BCAL
−
## Construction Status: builds, mini module
+
## 2006 Beam test analysis at forward angles: [https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=1887]
−
## Fibres
+
## [[BCAL Beam Tests 2012]]
 +
## SiPM  [https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=1890 PDE extraction] at Regina
 +
## [http://pdn.sciencedirect.com/science?_ob=MiamiImageURL&_cid=271580&_user=859303&_pii=S0168900210008156&_check=y&_origin=search&_zone=rslt_list_item&_coverDate=2010-08-21&wchp=dGLbVlt-zSkzV&md5=9f009a21ee5214aa9f32f6b0a0da28a7/1-s2.0-S0168900210008156-main.pdf Characterization studies of silicon photomultipliers NIM A620 (2010) 217] (Link for JLab)
 +
##* [[Media:NIMA620-217.png|Key Figure 8]]
 
# USM update
 
# USM update
−
## [https://halldweb1.jlab.org/wiki/images/3/3f/Production_manager_report_3_Jan_2012.pdf Production Manager Report]
+
## [https://halldweb.jlab.org/wiki/images/4/4b/PDE_comparisons_17Jan2012.pdf PDE measurement update at USM]
−
# [[Readiness Review: Testing of light sensors for Bcal]]
+
# TDR update
 +
#* We need to start revising our section
 
# Simulations/Reconstruction
 
# Simulations/Reconstruction
 
# Any other business
 
# Any other business
  
 
=Minutes=
 
=Minutes=
−
''Attending: Alam, Will, Hayk, Javiera (new production manager) (USM); Elton, John L., Tim, David, John D., Eugene (Jlab); Kei tried unsuccessfully to connect via EVO
+
''Attending: David, Tim, Beni, John L., John D., Elton (JLab); Will, Serguei (USM); Zisis, George, Andrei (UofR); George, Christina (Athens).
  
 
# Announcements
 
# Announcements
−
#* USM has hired a production manager for testing SiPM. Her name is Javiera Quiroz. !Bienvenida!
 
 
# Review of Action Items
 
# Review of Action Items
 
# Monitoring.
 
# Monitoring.
−
#* There have been some e-mail exchanges between Chuck, Jim and Elton at JLab and Christina.
+
#* [https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=1891 First Results with UV LEDS]
−
#* The current geometry appears to have an interference with the board. Will probably move the location of the LED on the bottom side of the board.
+
#* Tested UV LED and it performs similar to other light colors. Uniformity seems to be more uniform over a larger area.
−
#* I talked to Christina via skype this morning. They have made progress on setting up the Fcal setup: All UV LEDs are in hand and the plexiglass has been ordered but not yet polished.
+
−
# Beam tests in Hall B (fall 2011) (John)
+
−
#* Not much change since last meeting. Analysis is still in progress
+
−
#* Italian group is also testing a prototype of the forward cal, which is under the tagger on the floor of Hall B. Any changes to the configuration will need to include them in the discussions.
+
 
# FCAL
 
# FCAL
 
## Construction Status: mechanical, bases (notes from Matt)
 
## Construction Status: mechanical, bases (notes from Matt)
−
##* New batch of bases have been received, but fabrication issues remain and Paul is working on them.
+
##* Mechanical includes outer welded structure and inner stair step clamps for glass
−
##* The two faulty bases that were sent for the beamtest have been returned. Some loose connections of the transition board were found on one, but the failures are still under investigation.
+
##* Inner parts are being fabricated in the IU shop
 +
##* Outer welded structure drawing package is out for bids by outside contractor
 +
##* PMTs are being glued to light guides. Have glued about 700, and tested about 600. Tested all new tubes, about 450. 3 failures
 +
##* Tested about 150 from the old pmts, 2 cracked windows, 1 failure
 +
##* Concern about the cracked windows. Slow down and do more careful tests with 20-30 pmts. Concern about whether the type of glass is different between old and new, but could be aging.
 +
##* Status of CW bases. Comm boards completed. Multiplier board, which generate the HV
 +
##* Fabrication without conformal coating are mostly resolved
 +
##* Latest batch with conformal coating was horrible and have been returned to the vendor.
 +
## Beam tests in Hall B (John)
 +
##* Gains are balanced, checking that the procedure is robust
 +
##* Detector is aligned relative to small remote paddle.
 +
##* Next: reduce size of remote paddle, move detector down to floor, merge DAQ with Hall B tagger to check electron energy
 +
##* Resolution is about deltaE/E ~ 22%
 
# BCAL
 
# BCAL
−
## Construction Status: builds, mini module
+
## [https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=1887 2006 Beam test analysis at forward angles]
−
##* No update
+
##* Presenting data at small angles from the Hall B beam test. Recall we tested a full length, but rectangular cross section and blue HiTech fibers
−
## Fibres
+
##* Map angle dependence of resolution (Stamatis' thesis).
−
# [[Readiness Review: Testing of light sensors for Bcal]]
+
##* Resolution degrades from about 5.5/sqrt(E) to 7.2/sqrt(E).
−
#* Three recommendations
+
## [[BCAL Beam Tests 2012]]
−
#* Qualify the test setup by comparing results of 30 First Article units already tested at JLab
+
## SiPM  [https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=1890 PDE extraction] at Regina
−
#* Instate a production manager
+
## [http://pdn.sciencedirect.com/science?_ob=MiamiImageURL&_cid=271580&_user=859303&_pii=S0168900210008156&_check=y&_origin=search&_zone=rslt_list_item&_coverDate=2010-08-21&wchp=dGLbVlt-zSkzV&md5=9f009a21ee5214aa9f32f6b0a0da28a7/1-s2.0-S0168900210008156-main.pdf Characterization studies of silicon photomultipliers NIM A620 (2010) 217] (Link for JLab)
−
#* Update documentation with final procedures
+
##* [[Media:NIMA620-217.png|Key Figure 8]]
 
# USM update
 
# USM update
−
## Javiera Quiroz has been hired as the production manager
+
## [https://halldweb.jlab.org/wiki/images/4/4b/PDE_comparisons_17Jan2012.pdf PDE measurement update at USM]
−
## Only two days of holidays, so work on the testing has proceeded at a good pace
+
##* Systematic measurements at USM confirm the earlier reports of PDE~32% compared to JLab measurements of ~20%.  
−
## Qualifying the test setup (Alam and Will)
+
##* The USM are comparable to the Hamamatsu measurements. Elton pointed out that several groups obtain lower values consistent with the JLab measurements.
−
##* Detailed comparisons are proceeding in station 2.
+
##* A meeting to review and compare JLab/USM/UofR PDE measurements was scheduled for Friday at 10:30.
−
##* So far eight first article pieces have been tested. The test setup suffers from a slow DAQ, which is being replaced with a faster system. The current test rate is 6 hours/SiPM
+
# TDR update
−
##* Data from USM, JLab and Hamamatsu is strongly correlated, although the absolute values are somewhat different.
+
#* Elton with start an outline to be discussed next time and assign writing homework.
−
##* A more detail update will be presented at the Bcal meeting next week.
+
−
## Improvements in station 3 (Will)
+
−
##* Silicon pads to ensure contact between the SiPM and the cooling plate are on order
+
−
##* Data taking at different temperatures are accomplished using  station 3. The thermistors recording temperatures on the cooling plate are monitored and are repeatable, but not yet calibrated. Temperature for test is being set at the chiller to 1.5-2 deg below desired temperature at the SiPM.
+
−
## [https://halldweb1.jlab.org/wiki/images/3/3f/Production_manager_report_3_Jan_2012.pdf Production Manager Report]
+
−
##* Stage 4 will be the offline analysis. Results from this stage are currently being included into the data base. Two dedicated computers have been installed for the analysis.  
+
 
# Simulations/Reconstruction
 
# Simulations/Reconstruction
 +
#* Will has identified some issues with the present z vertex reconstruction and has posted them on a wiki page. They will be discussed at the offline meeting
 +
#* Elton suggested that the page be linked from the wiki pages that were used previously to discuss cal software.
 
# Any other business
 
# Any other business

Latest revision as of 17:12, 24 February 2017

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). Electronics is being prepared, should be ready by next week sometime.
    • Measure stability of light intensity as a function of time.
    • Jlab to generate a drawing of the plexiglass sheet to be used in next batch of tests.
  2. FCAL
    • Send IU the drawings for the FCAL welded frame. (Tim) Drawings are being signed today and will be forwarded to IU.

Tentative Agenda

  1. Announcements
  2. Review of Action Items
  3. Monitoring.
  4. FCAL
    1. Construction Status: mechanical, bases (notes from Matt)
    2. Beam tests in Hall B (John)
  5. BCAL
    1. 2006 Beam test analysis at forward angles: [1]
    2. BCAL Beam Tests 2012
    3. SiPM PDE extraction at Regina
    4. Characterization studies of silicon photomultipliers NIM A620 (2010) 217 (Link for JLab)
  6. USM update
    1. PDE measurement update at USM
  7. TDR update
    • We need to start revising our section
  8. Simulations/Reconstruction
  9. Any other business

Minutes

Attending: David, Tim, Beni, John L., John D., Elton (JLab); Will, Serguei (USM); Zisis, George, Andrei (UofR); George, Christina (Athens).

  1. Announcements
  2. Review of Action Items
  3. Monitoring.
    • First Results with UV LEDS
    • Tested UV LED and it performs similar to other light colors. Uniformity seems to be more uniform over a larger area.
  4. FCAL
    1. Construction Status: mechanical, bases (notes from Matt)
      • Mechanical includes outer welded structure and inner stair step clamps for glass
      • Inner parts are being fabricated in the IU shop
      • Outer welded structure drawing package is out for bids by outside contractor
      • PMTs are being glued to light guides. Have glued about 700, and tested about 600. Tested all new tubes, about 450. 3 failures
      • Tested about 150 from the old pmts, 2 cracked windows, 1 failure
      • Concern about the cracked windows. Slow down and do more careful tests with 20-30 pmts. Concern about whether the type of glass is different between old and new, but could be aging.
      • Status of CW bases. Comm boards completed. Multiplier board, which generate the HV
      • Fabrication without conformal coating are mostly resolved
      • Latest batch with conformal coating was horrible and have been returned to the vendor.
    2. Beam tests in Hall B (John)
      • Gains are balanced, checking that the procedure is robust
      • Detector is aligned relative to small remote paddle.
      • Next: reduce size of remote paddle, move detector down to floor, merge DAQ with Hall B tagger to check electron energy
      • Resolution is about deltaE/E ~ 22%
  5. BCAL
    1. 2006 Beam test analysis at forward angles
      • Presenting data at small angles from the Hall B beam test. Recall we tested a full length, but rectangular cross section and blue HiTech fibers
      • Map angle dependence of resolution (Stamatis' thesis).
      • Resolution degrades from about 5.5/sqrt(E) to 7.2/sqrt(E).
    2. BCAL Beam Tests 2012
    3. SiPM PDE extraction at Regina
    4. Characterization studies of silicon photomultipliers NIM A620 (2010) 217 (Link for JLab)
  6. USM update
    1. PDE measurement update at USM
      • Systematic measurements at USM confirm the earlier reports of PDE~32% compared to JLab measurements of ~20%.
      • The USM are comparable to the Hamamatsu measurements. Elton pointed out that several groups obtain lower values consistent with the JLab measurements.
      • A meeting to review and compare JLab/USM/UofR PDE measurements was scheduled for Friday at 10:30.
  7. TDR update
    • Elton with start an outline to be discussed next time and assign writing homework.
  8. Simulations/Reconstruction
    • Will has identified some issues with the present z vertex reconstruction and has posted them on a wiki page. They will be discussed at the offline meeting
    • Elton suggested that the page be linked from the wiki pages that were used previously to discuss cal software.
  9. Any other business
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