Difference between revisions of "April 5, 2017, Production & Analysis Working Group"

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=== Data Production ===
 
=== Data Production ===
 
# Monitoring Update --- Thomas Britton
 
# Monitoring Update --- Thomas Britton
# Calibration Update --- Sean Dobbs
+
# [https://halldweb.jlab.org/wiki/images/f/f4/Production_20170404.pdf Calibration Update] --- Sean Dobbs
 
#* [[Calibration_Dashboard#ver01_Recon_Checklist | ver01 Recon Checklist]]
 
#* [[Calibration_Dashboard#ver01_Recon_Checklist | ver01 Recon Checklist]]
 
#* [[RunPeriod-2017-01 Validation]]
 
#* [[RunPeriod-2017-01 Validation]]
 +
#* [https://logbooks.jlab.org/entry/3469212 Random trigger studies]
 
# Preparing for the first Spring 2017 production launch
 
# Preparing for the first Spring 2017 production launch
 
# Processing Update --- Alex Austregesilo
 
# Processing Update --- Alex Austregesilo
  
 
=== Analysis Focus: Total Cross Sections ===
 
=== Analysis Focus: Total Cross Sections ===
# J/Ψ, φ --- Lubomir
+
# J/Ψ, φ [http://www.jlab.org/Hall-D/detector/fdc/reports/jp/Jpsi_anal_apr2017.pdf] --- Lubomir
 
# η, ρ, ω, φ --- Simon
 
# η, ρ, ω, φ --- Simon
 
# φ --- Thomas
 
# φ --- Thomas
Line 51: Line 52:
 
# FDC Hit Efficiencies --- Alex Austregesilo
 
# FDC Hit Efficiencies --- Alex Austregesilo
 
# BCAL Hit Efficiencies --- Elton Smith
 
# BCAL Hit Efficiencies --- Elton Smith
# FCAL Hit Efficiencies --- Jon Zarling
+
# [https://halldweb.jlab.org/wiki-private/index.php/FCAL_Analysis_Summary FCAL Shower Efficiencies] --- Jon Zarling
  
 
=== Data Production Milestones ===
 
=== Data Production Milestones ===
Line 71: Line 72:
 
# Tracking Efficiencies --- Paul Mattione
 
# Tracking Efficiencies --- Paul Mattione
 
# BCAL Shower Efficiencies --- Elton Smith
 
# BCAL Shower Efficiencies --- Elton Smith
# FCAL Shower Efficiencies --- Jon Zarling
+
# [https://halldweb.jlab.org/wiki-private/index.php/FCAL_Analysis_Summary FCAL Shower Efficiencies] --- Jon Zarling
  
 
* '''Week after next: Other'''
 
* '''Week after next: Other'''
Line 88: Line 89:
 
# Trigger emulation --- Alex Somov
 
# Trigger emulation --- Alex Somov
 
# Triggering efficiency --- Alex Somov
 
# Triggering efficiency --- Alex Somov
 +
 +
= Minutes =
 +
 +
=== Data Production ===
 +
# Sean reported on the status of calibrations in preparation for the next production run.
 +
#* Gain calibrations are nearly done: FCAL is finished, and the BCAL and CDC are finishing off some last checks.
 +
#* Timing calibrations are an outstanding problem.  The 4ns run-to-run time shifts are due to issues with the fADC250 firmware (not TDCs as originally thought).  Both BCAL and FCAL groups are evaluating how to deal with these shifts in their new time calibration frameworks.
 +
#** The BCAL group potentially has a method using a new table to calibrate these 4 ns shifts for each run.  The impact of these recalibrations on higher level calibrations will need to be checked carefully, one step at a time.
 +
#** The FCAL group is planning to look at LED data to assess the run-to-run shifts.
 +
#** Sean showed some plots of pi- delta T time resolutions as a function of run number, which are generally flat but have some interesting features that need to be understood.  Outliers in the high-rate period (run > 30800) are due to tracking miscalibration.
 +
#* Mike Staib is working on getting the drift chamber alignment ot yield well-behaved kinematic fit pulls.  Following Elton's advice, he will start merging his code early net week with non-final constants so that it can be tested.
 +
#* A study of F1TDC unlocking shows that at these rates, it only affects the FDC wires, and is apparently due to the high-rate noise.  This effect will show up primarily as inefficiencies, and can be modeled.
 +
#* Sean pointed to his studies of background/noise rates using random/PS triggers in the referenced logbook entry,
 +
# Alex has done two monitoring launches since the last meeting, ver11 started last Friday, ver 12 started Monday after some timing problems were found and addressed.
 +
#* After some discussion in the meeting, the plan is to run over 20 files spread out through the run to increase the statistics used, perhaps the first and last 5 and 10 somewhere in the middle.
 +
# Given the ongoing calibration work, the plans for data production are shifted back by at least 2 weeks.
 +
#* Mike's alignment work is being done using Spring 2016 data.  If calibrations are ready for this soon, then this (much smaller) data will be prioritized.
 +
#* Sandy pointed out that the tape library will be down for a week in May as it is moved inside the computer center.
 +
 +
=== Analysis Focus: Total Cross Sections ===
 +
# Lubomir showed a plot with the J/psi under various selections, illustrating that proton and electron angles are well-reconstructed, it is just the electron momentum which is poorly reconstructed (as expected for very high-momentum, forward-going tracks).  He also showed a first glance at the spectrum using 2017 monitoring run data.
 +
# Simon has no update.
 +
# Thomas is still working and making progress.
 +
 +
=== Studies: Hit Efficiencies ===
 +
# Naomi reported that these studies have been on hold, pending calibrations.
 +
# Alex A. reported that the first look at 2017 data have shown slightly lower efficiencies.  The current values are limited by the calibrations, though.  He and Lubomir have been thinking about the best way to reproduce the observed efficiencies in simulation.
 +
# Elton has been studying the sources of BCAL hit inefficiencies, and has noted that some of them come from hits leaking out of the BCAL, and some from missing hits.  Will's upcoming clusterizer improvements may help with this.  The effects appear to be reproduced by simulation. 
 +
# Jon Z. reported on the current status of FCAL efficiencies.  The FCAL LED skims will be good for this, and will likely be a summer project for a new grad student.  He is making progress using omega -> 3pi decays where one of the photons is not reconstructed, and is obtaining good missing photon plots after tagger accidentals are subtracted.
 +
 +
=== Data Production Milestones ===
 +
 +
# Fri. April 21 - Finalize calibrations/software for low-rate running. Run final tests.
 +
#* Produce Spring 2016 "gold runs" as soon as alignment is ready
 +
# Fri. April 28 - Start production for low-rate running.
 +
# Fri. May 5 - Finalize calibrations/software for high-rate running. Run final tests.
 +
# Mon. May 8 -- Fri. May 12 (?) - Scicomp tape library down
 +
# Fri. May 19 - Start production for high-rate running.

Latest revision as of 16:03, 5 April 2017

Meeting Time and Place

The meeting will be on Wednesday April 5, 2017 at 2:00 pm EDT. For those people at Jefferson Lab, the meeting will be in room F326-327.

Meeting Connections

  1. To join via a Web Browser, go to the page [1] https://bluejeans.com/115815824.
  2. To join via Polycom room system go to the IP Address: 199.48.152.152 (bjn.vc) and enter the meeting ID: 115815824.
  3. To join via phone, use one of the following numbers and the Conference ID: 115815824.
    • US or Canada: +1 408 740 7256 or
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  4. More information on connecting to bluejeans is available.

Reconstruction & Analysis Studies Status

Agenda

  1. Announcements
  2. Collaboration Meeting May 15-17, 2017
  3. Data Production
  4. Analysis Focus
  5. This Week's Studies
  6. Any other studies
  7. Upcoming Study Schedule

This Week's Topics

  • Talks: Summary/overviews only. Detailed discussions should be held in the appropriate working groups.
  • Talks should be limited to 10 + 5 minutes.

Data Production

  1. Monitoring Update --- Thomas Britton
  2. Calibration Update --- Sean Dobbs
  3. Preparing for the first Spring 2017 production launch
  4. Processing Update --- Alex Austregesilo

Analysis Focus: Total Cross Sections

  1. J/Ψ, φ [2] --- Lubomir
  2. η, ρ, ω, φ --- Simon
  3. φ --- Thomas
  4. Any others?

Studies: Hit Efficiencies

(i.e. Is the detector working?) Updates on experiment, simulation, and the comparison between the two.

  1. CDC Hit Efficiencies --- Naomi Jarvis
  2. FDC Hit Efficiencies --- Alex Austregesilo
  3. BCAL Hit Efficiencies --- Elton Smith
  4. FCAL Shower Efficiencies --- Jon Zarling

Data Production Milestones

  1. Fri. April 7 - Finalize calibrations/software for low-rate running. Run final tests.
  2. Fri. April 14 - Start production for low-rate running.
  3. Fri. April 21 - Finalize calibrations/software for high-rate running. Run final tests.
  4. Fri. April 28 - Start production for high-rate running.

Upcoming Study Schedule

  • Updates on experiment, simulation, and the comparison between the two.
  • Summary/overviews only. Detailed discussions should be held in the appropriate working groups.
  • All talks should be limited to 10 + 5 minutes.
  • Next Week: Alignment & Track/Shower Efficiencies

(i.e. Is the reconstruction working?) Updates on experiment, simulation, and the comparison between the two.

  1. Drift chamber alignment --- Mike Staib
  2. Tracking Efficiencies --- Paul Mattione
  3. BCAL Shower Efficiencies --- Elton Smith
  4. FCAL Shower Efficiencies --- Jon Zarling
  • Week after next: Other
  1. Track / Hit Matching: BCAL, FCAL, TOF, SC --- Paul Mattione
  2. Efficiencies: TOF, SC
  3. Means & Resolutions (time, energy, dE/dx): Tracking, BCAL, FCAL, SC, TOF
  4. Uncertainties: PID (BCAL, FCAL, TOF, dE/dx), Kinfit (BCAL, FCAL, tracking)
  5. Channel/Analysis Studies: Branching ratios, cross sections, SDMEs, beam asymmetries
  6. Other reconstruction/analysis issues
  • The following week: Beamline & Triggering
  1. Flux --- Justin
  2. Beam energy --- Beamline Group
  3. Polarization (TPOL & lineshape) --- Beamline Group
  4. Beam Asymmetries --- Alex Austregesilo
  5. Trigger emulation --- Alex Somov
  6. Triggering efficiency --- Alex Somov

Minutes

Data Production

  1. Sean reported on the status of calibrations in preparation for the next production run.
    • Gain calibrations are nearly done: FCAL is finished, and the BCAL and CDC are finishing off some last checks.
    • Timing calibrations are an outstanding problem. The 4ns run-to-run time shifts are due to issues with the fADC250 firmware (not TDCs as originally thought). Both BCAL and FCAL groups are evaluating how to deal with these shifts in their new time calibration frameworks.
      • The BCAL group potentially has a method using a new table to calibrate these 4 ns shifts for each run. The impact of these recalibrations on higher level calibrations will need to be checked carefully, one step at a time.
      • The FCAL group is planning to look at LED data to assess the run-to-run shifts.
      • Sean showed some plots of pi- delta T time resolutions as a function of run number, which are generally flat but have some interesting features that need to be understood. Outliers in the high-rate period (run > 30800) are due to tracking miscalibration.
    • Mike Staib is working on getting the drift chamber alignment ot yield well-behaved kinematic fit pulls. Following Elton's advice, he will start merging his code early net week with non-final constants so that it can be tested.
    • A study of F1TDC unlocking shows that at these rates, it only affects the FDC wires, and is apparently due to the high-rate noise. This effect will show up primarily as inefficiencies, and can be modeled.
    • Sean pointed to his studies of background/noise rates using random/PS triggers in the referenced logbook entry,
  2. Alex has done two monitoring launches since the last meeting, ver11 started last Friday, ver 12 started Monday after some timing problems were found and addressed.
    • After some discussion in the meeting, the plan is to run over 20 files spread out through the run to increase the statistics used, perhaps the first and last 5 and 10 somewhere in the middle.
  3. Given the ongoing calibration work, the plans for data production are shifted back by at least 2 weeks.
    • Mike's alignment work is being done using Spring 2016 data. If calibrations are ready for this soon, then this (much smaller) data will be prioritized.
    • Sandy pointed out that the tape library will be down for a week in May as it is moved inside the computer center.

Analysis Focus: Total Cross Sections

  1. Lubomir showed a plot with the J/psi under various selections, illustrating that proton and electron angles are well-reconstructed, it is just the electron momentum which is poorly reconstructed (as expected for very high-momentum, forward-going tracks). He also showed a first glance at the spectrum using 2017 monitoring run data.
  2. Simon has no update.
  3. Thomas is still working and making progress.

Studies: Hit Efficiencies

  1. Naomi reported that these studies have been on hold, pending calibrations.
  2. Alex A. reported that the first look at 2017 data have shown slightly lower efficiencies. The current values are limited by the calibrations, though. He and Lubomir have been thinking about the best way to reproduce the observed efficiencies in simulation.
  3. Elton has been studying the sources of BCAL hit inefficiencies, and has noted that some of them come from hits leaking out of the BCAL, and some from missing hits. Will's upcoming clusterizer improvements may help with this. The effects appear to be reproduced by simulation.
  4. Jon Z. reported on the current status of FCAL efficiencies. The FCAL LED skims will be good for this, and will likely be a summer project for a new grad student. He is making progress using omega -> 3pi decays where one of the photons is not reconstructed, and is obtaining good missing photon plots after tagger accidentals are subtracted.

Data Production Milestones

  1. Fri. April 21 - Finalize calibrations/software for low-rate running. Run final tests.
    • Produce Spring 2016 "gold runs" as soon as alignment is ready
  2. Fri. April 28 - Start production for low-rate running.
  3. Fri. May 5 - Finalize calibrations/software for high-rate running. Run final tests.
  4. Mon. May 8 -- Fri. May 12 (?) - Scicomp tape library down
  5. Fri. May 19 - Start production for high-rate running.