Difference between revisions of "Π polarizability Meeting Feb 24, 2021"
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== Meeting Time And Location == | == Meeting Time And Location == | ||
09:00 EST (JLab time) Weekly Meeting <br> | 09:00 EST (JLab time) Weekly Meeting <br> | ||
− | |||
REMOTE during Covid-19 | REMOTE during Covid-19 | ||
Line 44: | Line 43: | ||
== Action Items == | == Action Items == | ||
− | == Agenda | + | == Preliminary Agenda == |
# Previous CPP meeting: [[π polarizability Meeting Feb 3, 2021|Feb 3, 2021]] | # Previous CPP meeting: [[π polarizability Meeting Feb 3, 2021|Feb 3, 2021]] | ||
# Announcements | # Announcements | ||
# Action Items | # Action Items | ||
# [[CPP and NPP Readiness Review]] | # [[CPP and NPP Readiness Review]] | ||
+ | #* [https://markito3.wordpress.com/2021/02/22/muon-chambers-and-geant4-meeting/ Meeting Ilya, Mark, Beni and David] | ||
# Data Analysis | # Data Analysis | ||
# PID + AI | # PID + AI | ||
+ | # [[Media:MWPC_issues.pdf]] ERR review of MWPC development | ||
# Other business | # Other business | ||
# Next meeting | # Next meeting | ||
== Minutes == | == Minutes == | ||
− | '' Attending: | + | '' Attending: Elton, Andrew, Beni, David, Ilya, Mark, Miskimen, Kishan? |
+ | |||
+ | # Previous CPP meeting: [[π polarizability Meeting Feb 3, 2021|Feb 3, 2021]] | ||
+ | # Announcements | ||
+ | #* Elton: ERR Final Report has been received and posted to the ERR wiki page | ||
+ | # Action Items | ||
+ | # [[CPP and NPP Readiness Review]] | ||
+ | #* [https://markito3.wordpress.com/2021/02/22/muon-chambers-and-geant4-meeting/ Meeting Ilya, Mark and David] | ||
+ | #* Mark: All pieces to the simulation are in place but need testing. Elementary hit generation is also implemented. Mark, Ilya and Beni will start checking system, then coordinate with Richard | ||
+ | # Data Analysis (Andrew) | ||
+ | #* Andrew showed an update on the asymmetry of e+/e- pairs. Previously it was shown that there are more events at about -100deg compared to +100deg. | ||
+ | #* He checked in MC that no changes are seen if the photon beam is shifted. [There was some question if the analysis also moves with the beam position]. | ||
+ | #* He changed the position of the electron on the collimator by 1 mm. This does create an asymmetry but with a much smaller size than that seen in the data. | ||
+ | #* Computing the asymmetry with 0deg and 90deg data sets removes most, if not all, of the asymmetry. It is likely the asymmetry is instrumental (detector acceptance?) | ||
+ | # PID + AI | ||
+ | # [[Media:MWPC_issues.pdf | ERR review of MWPC development]] | ||
+ | #* Rory reviewed major recommendations relative to the MWPCs: efficiencies and rates | ||
+ | #* Prototype studies of small chamber guided decision to use Ar:CO2 90:10 mixture to decrease drift time | ||
+ | #* Efficiency plateaus were conducted for the prototype chamber in 2017 | ||
+ | #* For pi/mu identification, need good calibration of the muon response in the MC. | ||
+ | #* Rory proposes to install scintillators behind the muon detector in order to measure the efficiency in situ for the MWPC 5 and 6. For this measurement, the proposal is to install both MWPC 5 and 6 with vertical wires and a vertical scintillator to tag muons. | ||
+ | #* Beni: Could install more than one scintillator. Suggests having the scintillator oriented the same as the wires and use the time difference from tubes at each end to determine position. | ||
+ | # Other business | ||
+ | # Next meeting |
Latest revision as of 14:43, 24 February 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 -->):
- Make sure you have created a BlueJeans account via your JLab CUE account using this link:
- http://jlab.bluejeans.com (You should only need to do this once)
- Meeting ID: 949 429 419
- (you may need to type this in, depending how you connect)
- If connecting via Web Browser: click this link (no passcode is needed):
- 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
- If connecting via Phone: Dial one of the following numbers and then enter the meeting ID above and hit "#" or "##"
- Dial: (408) 740-7256 (US or Canada only)
- or, List of International Numbers
- If connecting via Polycom unit:
- Dial 199.48.152.152 or bjn.vc
- Enter meeting ID above
Action Items
Preliminary Agenda
- Previous CPP meeting: Feb 3, 2021
- Announcements
- Action Items
- CPP and NPP Readiness Review
- Data Analysis
- PID + AI
- Media:MWPC_issues.pdf ERR review of MWPC development
- Other business
- Next meeting
Minutes
Attending: Elton, Andrew, Beni, David, Ilya, Mark, Miskimen, Kishan?
- Previous CPP meeting: Feb 3, 2021
- Announcements
- Elton: ERR Final Report has been received and posted to the ERR wiki page
- Action Items
- CPP and NPP Readiness Review
- Meeting Ilya, Mark and David
- Mark: All pieces to the simulation are in place but need testing. Elementary hit generation is also implemented. Mark, Ilya and Beni will start checking system, then coordinate with Richard
- Data Analysis (Andrew)
- Andrew showed an update on the asymmetry of e+/e- pairs. Previously it was shown that there are more events at about -100deg compared to +100deg.
- He checked in MC that no changes are seen if the photon beam is shifted. [There was some question if the analysis also moves with the beam position].
- He changed the position of the electron on the collimator by 1 mm. This does create an asymmetry but with a much smaller size than that seen in the data.
- Computing the asymmetry with 0deg and 90deg data sets removes most, if not all, of the asymmetry. It is likely the asymmetry is instrumental (detector acceptance?)
- PID + AI
- ERR review of MWPC development
- Rory reviewed major recommendations relative to the MWPCs: efficiencies and rates
- Prototype studies of small chamber guided decision to use Ar:CO2 90:10 mixture to decrease drift time
- Efficiency plateaus were conducted for the prototype chamber in 2017
- For pi/mu identification, need good calibration of the muon response in the MC.
- Rory proposes to install scintillators behind the muon detector in order to measure the efficiency in situ for the MWPC 5 and 6. For this measurement, the proposal is to install both MWPC 5 and 6 with vertical wires and a vertical scintillator to tag muons.
- Beni: Could install more than one scintillator. Suggests having the scintillator oriented the same as the wires and use the time difference from tubes at each end to determine position.
- Other business
- Next meeting