Difference between revisions of "Pion Meeting June 4 2021 11AM ET"
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=Agenda= | =Agenda= | ||
| − | # Updates on pion detector studies (Elham) | + | # Updates on pion detector studies (Elham) [https://moller.jlab.org/cgi-bin/DocDB/private/ShowDocument?docid=735] |
# Beam generator simulations (Raj) | # Beam generator simulations (Raj) | ||
=Attendance= | =Attendance= | ||
| + | |||
| + | David, Elham, Julia, Raj, Wouter | ||
=Minutes= | =Minutes= | ||
| + | |||
| + | * Pion detector studies (Elham) | ||
| + | ** Entire pion donut holding frame changed to vacuum | ||
| + | *** improves pi/e ratio by factor 2 | ||
| + | *** still have charged particles reach lucite | ||
| + | *** frame is significant source of background | ||
| + | ** Shorter lucite detector and shifted inwards: | ||
| + | *** improves pi/e ratio marginally but not dramatically | ||
| + | ** TODO | ||
| + | *** Set the lucite lightguide to vacuum: check whether lightguide or PMT is a big part of the source of background in our lucite | ||
| + | *** Look at hit.phi - hit.vphi (= atan2(hit.vx,hit.vy)): does background come from same or different sector? | ||
| + | *** Draw separate sources independently and zoomed in: one plot each for showermax, concrete/lead, lightguide, lucite close-up with shielding, with number of entries shown on each plot | ||
| + | *** Draw direction histogram for lucite hits at top surface: 1d histo of momentum theta, 2d histo of momentum theta and phi, 1d histo of dot product with axis towards PMT | ||
| + | *** Check pi/e ratio at the main detector plane 28, probably only needs 100k events | ||
| + | *** Copy files from /home/elhamm/projects/rrg-jmammei/elhamm/PionDetectorOptimization/simulation/scratch/16-16-AllFrame-Galactic-2cmshiftedLucite-7cm/moller.root to volatile | ||
Latest revision as of 16:17, 4 June 2021
Back to Main Page >> Pion Meetings
- Bluejeans link: 420 107 252
- Dial-in: 408-740-7256 (US), 888-240-2560 (US Toll Free), 408-317-9253 (Alternate number)
Agenda
- Updates on pion detector studies (Elham) [1]
- Beam generator simulations (Raj)
Attendance
David, Elham, Julia, Raj, Wouter
Minutes
- Pion detector studies (Elham)
- Entire pion donut holding frame changed to vacuum
- improves pi/e ratio by factor 2
- still have charged particles reach lucite
- frame is significant source of background
- Shorter lucite detector and shifted inwards:
- improves pi/e ratio marginally but not dramatically
- TODO
- Set the lucite lightguide to vacuum: check whether lightguide or PMT is a big part of the source of background in our lucite
- Look at hit.phi - hit.vphi (= atan2(hit.vx,hit.vy)): does background come from same or different sector?
- Draw separate sources independently and zoomed in: one plot each for showermax, concrete/lead, lightguide, lucite close-up with shielding, with number of entries shown on each plot
- Draw direction histogram for lucite hits at top surface: 1d histo of momentum theta, 2d histo of momentum theta and phi, 1d histo of dot product with axis towards PMT
- Check pi/e ratio at the main detector plane 28, probably only needs 100k events
- Copy files from /home/elhamm/projects/rrg-jmammei/elhamm/PionDetectorOptimization/simulation/scratch/16-16-AllFrame-Galactic-2cmshiftedLucite-7cm/moller.root to volatile
- Entire pion donut holding frame changed to vacuum
