Difference between revisions of "BCAL Reconstruction Meeting 2016-01-21"

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## Effective speed (George)
 
## Effective speed (George)
 
## Muon decays (Will)
 
## Muon decays (Will)
−
## Pi0 events Fall 2015 [https://logbooks.jlab.org/entry/3370103] (Will M)
+
## Pi0 events
 
## Calibration (CCDB)
 
## Calibration (CCDB)
 
# Reconstruction
 
# Reconstruction
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= Minutes =
 
= Minutes =
  
−
''Attendees: Elton, Mark (Jlab), Curtis, Will, Mike (CMU), George (Athens), Ahmed, Noemi, Zisis (Regina)’’
+
''Attendees: Christina, George (Athens), Will, Curtis (CMU), Noemi, Tegan, Ahmed, Zisis, Andrei (Regina), Elton, Mark (JLab) "
  
−
# Announcements:  
+
# Announcements: magnet is being cooled, 10 K by next week.
−
## Solenoid on track to be cooled down in a couple of weeks; keep at 1200 A for spring run, higher current after run.  Accelerator will need commissioning weeks in February to tune things (fast feedback, nano amps bpms).  Standard shifts ops.  
+
# Action Items:
−
## Elton's email: ongoing conversation; solicit input by email. This could pipe info into the upcoming Wed meeting.
+
## Run preparations: BCAL is down to 5 C, SiPM at 7 C.  Some outliers in terms of temp: 4D, 19D (at 9 C). Possible poor connection.  Beni is taking cosmics and LED data mixed in. Ahmed will work on identifying LED triggers and Andrei will look at the cosmics.
−
## Hall D Wednesday Jan 13 meeting: initial discussion to set up run plan. Status of detector system.
+
## BCAL NIM work: Elton is has gathered a summary of JLab and USM work (the latter has two publications).  Regina work should be included as well. Curtis suggested we evaluate Share-LaTex product for the BCAL NIM, set up by Mike Staib for the CDC.
−
# Action Items
+
 
# Calibration/Commissioning
 
# Calibration/Commissioning
−
## Cosmics analysis (Andrei, Irina)
+
## Cosmics analysis (Andrei, Irina): in progress.
−
##Time-walk corrections (Noemi): progressing. 4-parameter fits done, fits done on all data points rather than fits within bins, and TDC vs ADC t-w will be checked next and compared to TDC-ADC_t vs ADC.
+
##Time-walk corrections (Noemi): Report on DocDB ([https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=2898 GlueX-doc-2898]) using TDC minus ADC timing. Improvements on the range are included in the report. Noemi will now move to TDC_BCAL minus TDC-START timing.  
−
## Layer efficiencies (Ahmed): Mike is making progress in emulation code.  Will not work for old runs; mostly for future runs.  Firmware fADC250 might be ready during spring run, but collaboration might not use it during the run.  f125 emulation works great: 200 bad events out of 10,000,000 events.  Mod 8 was missing the integral and will have it in the new format (even in raw data).
+
## Layer efficiencies (Ahmed): Draft report ready.  Zisis will look at it over the weekend and then it will be posted to DocDB.  He will also look at the new LED data that will be taken in a few days.
−
## Effective speed (George): nothing new.  Effective speed is on hold; waiting for new data to run the code.  Working on pi0 analysis and learning.
+
## Effective speed (George): nothing new.  Will run his code after new data arrives, including cosmics.
−
## Muon decays (Will): nothing new.  Working on Andrei's text file and Andrei will provide ROOT files for this calibration.
+
## Muon decays (Will): Will work on Andrei's stuff soon.  Working on plugin for SiPMs to be ready before spring run.
−
## Pi0 events Fall 2015 [https://logbooks.jlab.org/entry/3370103] (Will M): Mark's NSA and NSB changes between spring and fall 2015.  Code same as that in offline monitoring histograms.  Target position is 63.8 cm but should be 96 cm for this run.  Target position is in HDDS and should be communicated automatically to the different codes.  Curtis: does HDDS have time stamps, or run-number dependencies?  Bring this up with Offline Group. pi0 means vary from 100-109 MeV/c2. With 96cm target means go 125-127 MeV/c2.  NSA-NSB captured ratio is 88% of old NSA-NSB value.  Fall had no tracking, but the NSA-NSB made up for some of this compared to spring running.  S/N dropped in fall vs spring running, because of inability to use tracking.  Optimization code has not been done yet, but will be attempted even without tracking.  Target was downstream of START so it can't be used either.  The final table is in eLog; useful for pi0 count for runs.  We should normalize (beam current, radiator thicknesses) and produce a flux.
+
## Pi0 events: Will produced an offline data monitoring plot browser plugin: pi0 peak fir for 1g-BCAL, 1g-FCAL and 2g-BCAL. It is checked into GIT so it was included in the last run of offline.
−
## Calibration (CCDB): After Colombia talk on SiPM, Elton is looking at MySQL DBs for SiPM (Santa Maria and JLab).  There are discrepancies:  a) PDE values disagree (Santa Maria has larger PDE than JLab).  At JLab Vbr was not measured, just took Hamamatsu values.  Santa Maria measured it.  b) Santa Maria dark rates are very small.  Sort this out for a BCAL paper.  BCAL Construction stuff should be included in a NIM (what was learned about the construction).  Orlando and Hayk are still at Santa Maria.  Orlando will come to Jlab to work on Hall B.  Zisis to do outline for paper and stab at construction paper.
+
## Calibration (CCDB): nothing to report.
−
# Reconstruction: Tegan and Justin have made progress on the eta prime; a peak is now visible above the background.
+
# Reconstruction: Tegan will present his work on the eta-prime at the Monday Physics meeting and possibly at the Physics session of the Collaboration meeting in February.
−
# Any other business (Elton's email)
+
# Any other business: none.
−
## Proposal to Tom and Tim to run the chiller at 5 C (so sensors at 7 C), using water in the chiller.  Check for stable operation for a long time at this temperature.  Mark will study the bias voltages at 7 C (he did before at 10 C and 18 C).
+
## [https://mailman.jlab.org/pipermail/halld-cal/2016-January/001195.html Preparations for Spring Run]
−
## Get pi0 normalization.
+
−
## Experimental triggers. EPICs events trigger, BCAL, BCAL-FCAL etc. We do not know what the trigger bits mean. We need a convention and understand.  We need LED pulser data in the data.  Comics data before and after run.  Mix LED and Cosmic data before run starts.  Run Orlando' scripts at the beginning of each run.; now we need to accommodate data taking with the TS.  Will can work on this with help from Mark.  Also, we need to print out diagnostics (instead of just looking at histos).
+
−
## Make a specific request for how much data we need in the spring running at next week's Wed meeting. 
+
−
## Make a Wiki page that is linked off Alexandre's run plan page.
+

Latest revision as of 17:12, 24 February 2017

Video Conferencing Information

Meeting Time: 11:00 a.m. EST

  1. To join via a Web Browser, go to the page [1] https://bluejeans.com/907185247.
  2. To join via Polycom room system go to the IP Address: 199.48.152.152 (bjn.vc) and enter the meeting ID: 907185247.
  3. To join via phone, use one of the following numbers and the Conference ID: 907185247.
    • US or Canada: +1 408 740 7256 or
    • US or Canada: +1 888 240 2560
  4. Upon connection all microphones are automatically muted. To unmute your mike on a Polycom or equivalent unit, enter *4. Unmuting on a computer is trivial as there is a microphone button than can be clicked.
  5. More information on connecting to bluejeans is available.

Participant Direct Lines

  • JLab Phone: in CC F326 is 757-269-6460 (usual room)
  • JLab Phone in CC L207 is 757-269-7084
  • Phone in the Regina Video-conference Suite is 306-585-4204

References

Action Items

  1. See Elton's new Wiki page for Spring 2016 run preparations
  2. Estimate pi0's needed and their rates for the run plan
  3. Work on BCAL NIM paper outline & construction section (Zisis)
  4. Sampling fraction tables (Tegan, Andrei)

Agenda

  1. Announcements
  2. Action Items
  3. Calibration/Commissioning
    1. Cosmics analysis (Andrei, Irina)
    2. Time-walk corrections (Noemi)
    3. Layer efficiencies (Ahmed)
    4. Effective speed (George)
    5. Muon decays (Will)
    6. Pi0 events
    7. Calibration (CCDB)
  4. Reconstruction
  5. Any other business
    1. Preparations for Spring Run

Minutes

Attendees: Christina, George (Athens), Will, Curtis (CMU), Noemi, Tegan, Ahmed, Zisis, Andrei (Regina), Elton, Mark (JLab) "

  1. Announcements: magnet is being cooled, 10 K by next week.
  2. Action Items:
    1. Run preparations: BCAL is down to 5 C, SiPM at 7 C. Some outliers in terms of temp: 4D, 19D (at 9 C). Possible poor connection. Beni is taking cosmics and LED data mixed in. Ahmed will work on identifying LED triggers and Andrei will look at the cosmics.
    2. BCAL NIM work: Elton is has gathered a summary of JLab and USM work (the latter has two publications). Regina work should be included as well. Curtis suggested we evaluate Share-LaTex product for the BCAL NIM, set up by Mike Staib for the CDC.
  3. Calibration/Commissioning
    1. Cosmics analysis (Andrei, Irina): in progress.
    2. Time-walk corrections (Noemi): Report on DocDB (GlueX-doc-2898) using TDC minus ADC timing. Improvements on the range are included in the report. Noemi will now move to TDC_BCAL minus TDC-START timing.
    3. Layer efficiencies (Ahmed): Draft report ready. Zisis will look at it over the weekend and then it will be posted to DocDB. He will also look at the new LED data that will be taken in a few days.
    4. Effective speed (George): nothing new. Will run his code after new data arrives, including cosmics.
    5. Muon decays (Will): Will work on Andrei's stuff soon. Working on plugin for SiPMs to be ready before spring run.
    6. Pi0 events: Will produced an offline data monitoring plot browser plugin: pi0 peak fir for 1g-BCAL, 1g-FCAL and 2g-BCAL. It is checked into GIT so it was included in the last run of offline.
    7. Calibration (CCDB): nothing to report.
  4. Reconstruction: Tegan will present his work on the eta-prime at the Monday Physics meeting and possibly at the Physics session of the Collaboration meeting in February.
  5. Any other business: none.
    1. Preparations for Spring Run
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