Difference between revisions of "Π polarizability Meeting Apr 7, 2021"

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== Action Items ==
 
== Action Items ==
−
 
−
# Draft list of responses to the ERR recommendations for discussion (Elton)
 
  
 
== Preliminary Agenda  ==
 
== Preliminary Agenda  ==
−
# Previous CPP meeting: [[&pi; polarizability Meeting Mar 24, 2021|Mar 24, 2021]]
+
# Previous CPP meeting: [[&pi; polarizability Meeting Mar 31, 2021|Mar 31, 2021]]
 
# Announcements
 
# Announcements
 
# Action Items
 
# Action Items
 
# [[CPP and NPP Readiness Review]]
 
# [[CPP and NPP Readiness Review]]
−
# [https://drive.google.com/drive/folders/1aiSOVh4zWwnObV5fA0eF-OXG8YbE14pO?usp=sharing Responses to the ERR]
+
# [https://drive.google.com/drive/folders/1aiSOVh4zWwnObV5fA0eF-OXG8YbE14pO?usp=sharing Responses to the ERR]. This link points to the draft response to the ERR.
 
## MWPCs (fabrication, testing) (Rory)
 
## MWPCs (fabrication, testing) (Rory)
−
##* Small DAQ system in ESB to test chambers when the arrive at JLab
 
 
## Trigger rates (beam test analysis, expectation with target pulled back) (Ilya)
 
## Trigger rates (beam test analysis, expectation with target pulled back) (Ilya)
 
## Hdgeant4 (initial setup and plan for running simulations) (Mark and Beni + moral support from David)
 
## Hdgeant4 (initial setup and plan for running simulations) (Mark and Beni + moral support from David)
−
##* update geometry
 
−
##* check hits make sense
 
 
## Analysis (low level reconstruction, monitoring) (David to write paragraph)
 
## Analysis (low level reconstruction, monitoring) (David to write paragraph)
−
##* Basic factories to look at raw data + conversion to energy/time.
 
−
##* Develop during the testing in ESB
 
 
## [[Media:CDC Crate1 4 CPP.pdf | CDC Coverage of electronics by one crate]] (Beni)
 
## [[Media:CDC Crate1 4 CPP.pdf | CDC Coverage of electronics by one crate]] (Beni)
 +
## MWPC gas system
 +
  Hi Elton,
 +
    I will not be able to participate in the CPP meeting tomorrow. There is an ERR for the Alert
 +
experiment going on the whole day where I have to be the chair.
 +
    With regards to a new gas system for the FMWPC , I think we have nost of the parts
 +
already available as we can use spare MFC and controller box. What is missing is
 +
a "gas panel" in the gas shed and a mixing tank with a pressure relive valve.
 +
Basically a copy of lets say the CDC. We do not need an alcohol admixture system.
 +
    This system could be build mostly during beam taking (second part of this year) so
 +
it would not take man power away from current ongoing work.
 +
    cheers,Beni
 +
## Tracking / extrapolation to MWPCs (Simon)
 
## Higher level analysis (e.g. PID, efficiencies and reconstruction) (Rory)
 
## Higher level analysis (e.g. PID, efficiencies and reconstruction) (Rory)
 
## Rates in MWPCs (Ilya)
 
## Rates in MWPCs (Ilya)
−
##* Initially need a plan for running full simulations with production geometry
 
 
## Microscope move (Elton)
 
## Microscope move (Elton)
 
##* Meeting with Richard and Jim on April 12 @ 1:30 pm.
 
##* Meeting with Richard and Jim on April 12 @ 1:30 pm.
−
## Timeline to publication (Elton will make something up)
+
##* Tim has remeasured the distance and the geometry can accommodate a shift of 2.31 m (not 2.6 m). We will revisit this tomorrow at the CPP design meeting.
−
##* calibration, high level analysis, amplitude analysis, CPP and NPP
+
## Timeline to publication (Draft available)
−
## Table of responsibilities (Elton)
+
## Table of responsibilities (Draft available)
 
# GlueX Data Analysis
 
# GlueX Data Analysis
−
#* [[Media:ASchick_2021-3-31_pippimmissprot.pdf | π+π-(p) update]] (Andrew)
 
−
#* [[Media:ASchick BLTWG 2021-3-30 BH Polarization.pdf| BLTWG BH Polarization Presentation]] (Andrew)
 
 
# CPP Software
 
# CPP Software
 
#* [https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=5011  Amplitude errors using bootstrap method] (Elton)
 
#* [https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=5011  Amplitude errors using bootstrap method] (Elton)
Line 79: Line 81:
  
 
== Minutes ==
 
== Minutes ==
−
'' Attending:
+
'' Attending: Albert, Alex, Andrew, David, Ilya, Mark, Rory, Elton
 +
 
 +
# Previous CPP meeting: [[&pi; polarizability Meeting Mar 31, 2021|Mar 31, 2021]]
 +
# Announcements
 +
# Action Items
 +
# [[CPP and NPP Readiness Review]]
 +
# [https://drive.google.com/drive/folders/1aiSOVh4zWwnObV5fA0eF-OXG8YbE14pO?usp=sharing Responses to the ERR]. This link points to the draft response to the ERR.
 +
## MWPCs (fabrication, testing) (Rory)
 +
##* Report in progress; expect completion soon
 +
## Trigger rates (beam test analysis, expectation with target pulled back) (Ilya)
 +
##* Calculations on target position completed; need to write it up.
 +
## Hdgeant4 (initial setup and plan for running simulations) (Mark and Beni + moral support from David)
 +
##* No update
 +
## Analysis (low level reconstruction, monitoring) (David to write paragraph)
 +
##* No update
 +
## [[Media:CDC Crate1 4 CPP.pdf | CDC Coverage of electronics by one crate]] (Beni)
 +
## MWPC gas system
 +
##* Options include building a new gas missing system or purchasing premixed 90/10 Ar/CO2. Premix is more expensive but also lead times are long. Need to investigate pros/cons.
 +
##* Gas system will be discussed tomorrow at the CPP Design meeting. Here is an email update from Beni
 +
  Hi Elton,
 +
    I will not be able to participate in the CPP meeting tomorrow. There is an ERR for the Alert
 +
experiment going on the whole day where I have to be the chair.
 +
    With regards to a new gas system for the FMWPC , I think we have nost of the parts
 +
already available as we can use spare MFC and controller box. What is missing is
 +
a "gas panel" in the gas shed and a mixing tank with a pressure relive valve.
 +
Basically a copy of lets say the CDC. We do not need an alcohol admixture system.
 +
    This system could be build mostly during beam taking (second part of this year) so
 +
it would not take man power away from current ongoing work.
 +
    cheers,Beni
 +
## Tracking / extrapolation to MWPCs (Simon)
 +
##* Need stable hdgeant4 MC operation to generate events
 +
## Higher level analysis (e.g. PID, efficiencies and reconstruction) (Rory)
 +
##* Andrew met with David and Kishan last week. Andrew provided Kishan with some data, which he has used to train a neutral net model. They plan to meet tomorrow afternoon to discuss the next steps.
 +
## Rates in MWPCs (Ilya)
 +
##* Use rate estimates for first chamber determined for studies of the joint in Pb shielding.
 +
##* Geant3 calculations use a cutoff energy of 10 keV. Rory: Fe55 5.9 keV X-ray does not penetrate Al wall -> this cutoff is reasonable.
 +
## Microscope move (Elton)
 +
##* Meeting with Richard and Jim on April 12 @ 1:30 pm.
 +
##* Tim has remeasured the distance and the geometry can accommodate a shift of 2.31 m (not 2.6 m). We will revisit this tomorrow at the CPP design meeting.
 +
## Timeline to publication (Draft available)
 +
##* Estimates difficult. Time to publication is probably at least 2 years. Alex: COMPASS took 5 years to publish their first data. Difficulty was adjusting MC to match data to the necessary precision. GlueX probably has a better start on MC studies compared to COMPASS. COMPASS has now switched to Geant4 and has yet to publish their polarizability data from 2012.
 +
## Table of responsibilities (Draft available)
 +
# GlueX Data Analysis (Andrew)
 +
#* Andrew met with Richard and has learned how to run his Bethe-Heitler event generator. Would like to make direct comparison with Rory's program. Elton will send a python script as an example for processing.
 +
#* Polarization studies: Current result is a about 3sigma low compared to TPOL. The extraction depends directly on the beam asymmetry Sigma, which has kinematical dependences, in particular the mass of the pair W. The data and MC do not match all kinematics. In particular there is a deficiency of the data at low W (corresponding to small angles). There is also a mismatch in the elasticity  There was discussion on this discrepancy and Andrew was encouraged to send an email to the google software list for feedback.
 +
# CPP Software
 +
#* [https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=5011  Amplitude errors using bootstrap method] (Elton)
 +
# PID + AI
 +
# Other business
 +
# Next meeting

Latest revision as of 11:17, 7 April 2021

Meeting Time And Location

09:00 EST (JLab time) Weekly Meeting

REMOTE during Covid-19

Connecting

You can connect using BlueJeans Video conferencing (ID: 949 429 419). (Click "Expand" to the right for details -->):

  1. Make sure you have created a BlueJeans account via your JLab CUE account using this link:

  2. Meeting ID: 949 429 419
    • (you may need to type this in, depending how you connect)

  3. If connecting via Web Browser: click this link (no passcode is needed):

  4. If connecting via iOS or Android App:
    • Use your JLab e-mail address to log in and then enter the meeting ID given above to join the meeting

  5. If connecting via Phone: Dial one of the following numbers and then enter the meeting ID above and hit "#" or "##"

  6. If connecting via Polycom unit:
    • Dial 199.48.152.152 or bjn.vc
    • Enter meeting ID above



Action Items

Preliminary Agenda

  1. Previous CPP meeting: Mar 31, 2021
  2. Announcements
  3. Action Items
  4. CPP and NPP Readiness Review
  5. Responses to the ERR. This link points to the draft response to the ERR.
    1. MWPCs (fabrication, testing) (Rory)
    2. Trigger rates (beam test analysis, expectation with target pulled back) (Ilya)
    3. Hdgeant4 (initial setup and plan for running simulations) (Mark and Beni + moral support from David)
    4. Analysis (low level reconstruction, monitoring) (David to write paragraph)
    5. CDC Coverage of electronics by one crate (Beni)
    6. MWPC gas system
  Hi Elton,
   I will not be able to participate in the CPP meeting tomorrow. There is an ERR for the Alert
experiment going on the whole day where I have to be the chair.
   With regards to a new gas system for the FMWPC , I think we have nost of the parts
already available as we can use spare MFC and controller box. What is missing is
a "gas panel" in the gas shed and a mixing tank with a pressure relive valve. 
Basically a copy of lets say the CDC. We do not need an alcohol admixture system.
   This system could be build mostly during beam taking (second part of this year) so
it would not take man power away from current ongoing work.
   cheers,Beni
    1. Tracking / extrapolation to MWPCs (Simon)
    2. Higher level analysis (e.g. PID, efficiencies and reconstruction) (Rory)
    3. Rates in MWPCs (Ilya)
    4. Microscope move (Elton)
      • Meeting with Richard and Jim on April 12 @ 1:30 pm.
      • Tim has remeasured the distance and the geometry can accommodate a shift of 2.31 m (not 2.6 m). We will revisit this tomorrow at the CPP design meeting.
    5. Timeline to publication (Draft available)
    6. Table of responsibilities (Draft available)
  2. GlueX Data Analysis
  3. CPP Software
  4. PID + AI
  5. Other business
  6. Next meeting

Minutes

Attending: Albert, Alex, Andrew, David, Ilya, Mark, Rory, Elton

  1. Previous CPP meeting: Mar 31, 2021
  2. Announcements
  3. Action Items
  4. CPP and NPP Readiness Review
  5. Responses to the ERR. This link points to the draft response to the ERR.
    1. MWPCs (fabrication, testing) (Rory)
      • Report in progress; expect completion soon
    2. Trigger rates (beam test analysis, expectation with target pulled back) (Ilya)
      • Calculations on target position completed; need to write it up.
    3. Hdgeant4 (initial setup and plan for running simulations) (Mark and Beni + moral support from David)
      • No update
    4. Analysis (low level reconstruction, monitoring) (David to write paragraph)
      • No update
    5. CDC Coverage of electronics by one crate (Beni)
    6. MWPC gas system
      • Options include building a new gas missing system or purchasing premixed 90/10 Ar/CO2. Premix is more expensive but also lead times are long. Need to investigate pros/cons.
      • Gas system will be discussed tomorrow at the CPP Design meeting. Here is an email update from Beni
  Hi Elton,
   I will not be able to participate in the CPP meeting tomorrow. There is an ERR for the Alert
experiment going on the whole day where I have to be the chair.
   With regards to a new gas system for the FMWPC , I think we have nost of the parts
already available as we can use spare MFC and controller box. What is missing is
a "gas panel" in the gas shed and a mixing tank with a pressure relive valve. 
Basically a copy of lets say the CDC. We do not need an alcohol admixture system.
   This system could be build mostly during beam taking (second part of this year) so
it would not take man power away from current ongoing work.
   cheers,Beni
    1. Tracking / extrapolation to MWPCs (Simon)
      • Need stable hdgeant4 MC operation to generate events
    2. Higher level analysis (e.g. PID, efficiencies and reconstruction) (Rory)
      • Andrew met with David and Kishan last week. Andrew provided Kishan with some data, which he has used to train a neutral net model. They plan to meet tomorrow afternoon to discuss the next steps.
    3. Rates in MWPCs (Ilya)
      • Use rate estimates for first chamber determined for studies of the joint in Pb shielding.
      • Geant3 calculations use a cutoff energy of 10 keV. Rory: Fe55 5.9 keV X-ray does not penetrate Al wall -> this cutoff is reasonable.
    4. Microscope move (Elton)
      • Meeting with Richard and Jim on April 12 @ 1:30 pm.
      • Tim has remeasured the distance and the geometry can accommodate a shift of 2.31 m (not 2.6 m). We will revisit this tomorrow at the CPP design meeting.
    5. Timeline to publication (Draft available)
      • Estimates difficult. Time to publication is probably at least 2 years. Alex: COMPASS took 5 years to publish their first data. Difficulty was adjusting MC to match data to the necessary precision. GlueX probably has a better start on MC studies compared to COMPASS. COMPASS has now switched to Geant4 and has yet to publish their polarizability data from 2012.
    6. Table of responsibilities (Draft available)
  2. GlueX Data Analysis (Andrew)
    • Andrew met with Richard and has learned how to run his Bethe-Heitler event generator. Would like to make direct comparison with Rory's program. Elton will send a python script as an example for processing.
    • Polarization studies: Current result is a about 3sigma low compared to TPOL. The extraction depends directly on the beam asymmetry Sigma, which has kinematical dependences, in particular the mass of the pair W. The data and MC do not match all kinematics. In particular there is a deficiency of the data at low W (corresponding to small angles). There is also a mismatch in the elasticity There was discussion on this discrepancy and Andrew was encouraged to send an email to the google software list for feedback.
  3. CPP Software
  4. PID + AI
  5. Other business
  6. Next meeting
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