Difference between revisions of "BCAL Reconstruction Meeting 2015-08-06"

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(Agenda)
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# Make some plots that clarify the need for implementation of "shower curvature" information into the reconstruction.
 
# Make some plots that clarify the need for implementation of "shower curvature" information into the reconstruction.
 
# Determine up/down gain ratios for spring data (Mark)
 
# Determine up/down gain ratios for spring data (Mark)
 
 
# High priority items
 
# High priority items
 
## BCAL and FCAL z coordinates: some are referenced to the center of the target, not the global coordinate system.
 
## BCAL and FCAL z coordinates: some are referenced to the center of the target, not the global coordinate system.
Line 51: Line 50:
 
= Minutes =
 
= Minutes =
  
''Attendees: ''
+
''Attendees: Elton, Simon, David, Mark (JLab), Will M, Mike (CMU), Noemi, Ahmed, Tegan, Zisis (Regina)''
 +
 
 +
# Announcements: LED data was taken for both North and South sections of BCAL.  One LED appears to be dead.
 +
# Action Items:
 +
## Shower curvature plots: Tegan will re-send his email from July 13 showing the effect of implementing the shower curvature.
 +
## Up/down gain ratios: This is related to gain calibration (2 step process: get mean gains and separate the two ends to use timing). U/D ratio is from the fall running.  Mark will update the procedure to make it more efficient and easy to use.
 +
## BCAL/FCAL coordinates: a) David and George worked on the radial coordinates.  As far as z-coord is concerned, Matt had proposed to leave things as they are, since most folks work with higher level objects and do not need to worry about different coordinate systems at the lower levels.  The issue originated with nonlinearity corrections for the FCAL but now the FCAL showers work ok.  Anyhow, the code is well documented where coordinate systems other than the global one are used.
 +
## Sampling fraction: before proceeding on this, we should review production MC plots and look at E vs Egen and extract resolution, etc. Tegan & Zisis will look at these and circulate.
 +
# Commissioning Efforts
 +
## Effective Velocities and Time Offsets (George)
 +
## Time-walk corrections (Noemi)[http://argus.phys.uregina.ca/gluex/DocDB/0027/002789/004/twalkTimingRuns.pdf]
 +
## Layer efficiencies (Ahmed) [https://halldweb1.jlab.org/wiki/images/2/2c/BCAL_EFF_Reconstruction_Aug52015.pdf]
 +
## DigiHits wrap up (Tegan)
 +
# Reconstruction
 +
## Update (Will M.) [http://argus.phys.uregina.ca/gluex/DocDB/0027/002790/001/single_end_pi0_stats.png]
 +
# Simulations
 +
# Any other business

Revision as of 10:15, 7 August 2015

Video Conferencing Information

Meeting Time: 11:00 a.m. EDT

  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

  1. BCAL Reconstruction Issues
  2. BCAL Reconstruction Algorithms
  3. Will's reconstructed energy info

Action Items

  1. Make some plots that clarify the need for implementation of "shower curvature" information into the reconstruction.
  2. Determine up/down gain ratios for spring data (Mark)
  3. High priority items
    1. BCAL and FCAL z coordinates: some are referenced to the center of the target, not the global coordinate system.
  4. Low priority items
    1. z-coordinate determination from up/down amplitude ratio
    2. Sampling fraction tables
    3. Code Cleanup

Agenda

  1. Announcements
  2. Action Items
  3. Commissioning Efforts
    1. Effective Velocities and Time Offsets (George)
    2. Time-walk corrections (Noemi)[2]
    3. Layer efficiencies (Ahmed) [3]
    4. DigiHits wrap up (Tegan)
  4. Reconstruction
    1. Update (Will M.) [4]
  5. Simulations
  6. Any other business

Minutes

Attendees: Elton, Simon, David, Mark (JLab), Will M, Mike (CMU), Noemi, Ahmed, Tegan, Zisis (Regina)

  1. Announcements: LED data was taken for both North and South sections of BCAL. One LED appears to be dead.
  2. Action Items:
    1. Shower curvature plots: Tegan will re-send his email from July 13 showing the effect of implementing the shower curvature.
    2. Up/down gain ratios: This is related to gain calibration (2 step process: get mean gains and separate the two ends to use timing). U/D ratio is from the fall running. Mark will update the procedure to make it more efficient and easy to use.
    3. BCAL/FCAL coordinates: a) David and George worked on the radial coordinates. As far as z-coord is concerned, Matt had proposed to leave things as they are, since most folks work with higher level objects and do not need to worry about different coordinate systems at the lower levels. The issue originated with nonlinearity corrections for the FCAL but now the FCAL showers work ok. Anyhow, the code is well documented where coordinate systems other than the global one are used.
    4. Sampling fraction: before proceeding on this, we should review production MC plots and look at E vs Egen and extract resolution, etc. Tegan & Zisis will look at these and circulate.
  3. Commissioning Efforts
    1. Effective Velocities and Time Offsets (George)
    2. Time-walk corrections (Noemi)[5]
    3. Layer efficiencies (Ahmed) [6]
    4. DigiHits wrap up (Tegan)
  4. Reconstruction
    1. Update (Will M.) [7]
  5. Simulations
  6. Any other business