Difference between revisions of "Pion Meeting April 22 2022 3:30PM ET"
From Moller Wiki
(→Attendance) |
(→Minutes) |
||
| Line 16: | Line 16: | ||
=Minutes= | =Minutes= | ||
| + | #Continued work on setting up for cosmic studies of lucite. Some issues with understanding calibration of trigger scintillator signals. Idea (David): compare to expected cosmic rate of 1/cm^2/min for horizontal detector, to ensure signal dominated by cosmic muons. Don't really understand auto-trigger mode of the CAEN digitizer, but self-triggered spectra look reasonable for scintillators. See what appears to be cosmic muons in the acrylic. Idea (Neven): should one try using LED pulser to calibrate single PE peak? Will start with selective blackening studies soon. | ||
| + | #Comparing rates at lucite for various generators, Raj finds significantly larger rate for the beam generators than from the sum of the individual process generators. Is this beam-pipe or beam dump background? Idea: look at p_z=negative events, and vertex | ||
| + | locations to see if this is beam dump or beam-line background. | ||
| + | #David sees, again, imperfect "fair sampling" of pion momenta with latest version of pion detector/donut geometry. Some of this might be improved by moving lucite radially outward somewhat. Idea (David): look at open/transition/closed pion detectors to see if one get empirical handle on any momentum-dependence of asymmetry. Still don't understand the events that appears in the lucite which were generated at theta > 0.023 radians (i.e. outside nominal acceptance). Idea (Jim): replace primary collimator with kryptonite in the simulation. | ||
| + | #AOB: We might want to try Phythia-8 as alternative source for pion generator (Wouter). | ||
Revision as of 13:21, 25 April 2022
Back to Main Page >> Pion Meetings
Zoom link: https://jlab-org.zoomgov.com/j/1608212513?pwd=M25LR1hzN3hLWm0xaFFETjZ0U1lQZz09
Agenda
Agenda:
- Update on prototyping the pion detector, still blackening the Lucite is in progress- (Elham)
- Comparing rates from different generators (beam, Moller, pion, elastic, and inelastic) with different analysis methods (python analysis and root analysis)- (Raj)
- Update on Fair Sampling - (David) [1]
- AOB
Attendance
Elham, Wouter, Raj, David, Jim, Neven
Minutes
- Continued work on setting up for cosmic studies of lucite. Some issues with understanding calibration of trigger scintillator signals. Idea (David): compare to expected cosmic rate of 1/cm^2/min for horizontal detector, to ensure signal dominated by cosmic muons. Don't really understand auto-trigger mode of the CAEN digitizer, but self-triggered spectra look reasonable for scintillators. See what appears to be cosmic muons in the acrylic. Idea (Neven): should one try using LED pulser to calibrate single PE peak? Will start with selective blackening studies soon.
- Comparing rates at lucite for various generators, Raj finds significantly larger rate for the beam generators than from the sum of the individual process generators. Is this beam-pipe or beam dump background? Idea: look at p_z=negative events, and vertex
locations to see if this is beam dump or beam-line background.
- David sees, again, imperfect "fair sampling" of pion momenta with latest version of pion detector/donut geometry. Some of this might be improved by moving lucite radially outward somewhat. Idea (David): look at open/transition/closed pion detectors to see if one get empirical handle on any momentum-dependence of asymmetry. Still don't understand the events that appears in the lucite which were generated at theta > 0.023 radians (i.e. outside nominal acceptance). Idea (Jim): replace primary collimator with kryptonite in the simulation.
- AOB: We might want to try Phythia-8 as alternative source for pion generator (Wouter).
