View source for Π polarizability Meeting Aug 14, 2024

10:00 EDT (JLab time) Weekly Meeting <br>

== Action Items ==

== Agenda  ==
# Previous CPP meeting: Aug 7 but no agenda
# Announcements
# Action Items
# Calibrations
#*TOF: Full calibration complete. Tested one run, looks very good, resolution below 100ps (for mean-time). CCDB has been updated.
#*FCAL: Calibration complete.
#*BCAL: Finished.  Running checks now.
#*CDC: calibration is done. [https://halldweb.jlab.org/gluex_demon/demon.html?RunPeriod=RunPeriod-2022-05&Version=27&Detector=CDC_CPP#cdc_dedxmean dE/dx vs run number]  Note that the timing resolution looks terrible in PlotBrowser because the figure of merit selection on the tracks plotted is very loose; if one looks at the higher FOM plots in the root files it can be seen that the timing is fine.  
#*FDC: t0 alignment running now: [https://halldweb.jlab.org/work/halld2/data_monitoring/RunPeriod-2022-05/mon_ver26/Run100531/FDC_resi.png]
#*CTOF, FMWPC:
#** Digihit integral vs peak 2-d plots for groups of 24 MWPC channels show noise dependence on hit multiplicity in the group.<br>[https://userweb.jlab.org/~ilarin/cpp/3333/ plots made for the entire group], file name legend: 1st number - MWPC#, 2nd - 24 wires group #, 3rd - one for 1...2 hits in the group, five for 10 or more hits
#* Tagger-Mic, PS, TPOL: ?
#** ver10: mic. and hod. timining mostly ok., needs some tweaking of individual channels. PS timing itself looks ok however the relative timing between PS and tagger is off by 4ns(always), this inhibits to do and accidental scaling factor calibration. One block of 5 microscope columns are off regarding energy calibration, it seems the ordering is switched (this seems to be also true for the 80k run period and the 110k run period).
#** ver11: looks worse regarding timing, e.g. tagger time minus RF time is off by 4ns most of the time., tagger time minus PS time is still off by 4ns
#** tagger microscope walk correction does not work well for all run periods after fall 2021. Ellie Prather from UCON is working on this issue.
#** Accidental Scaling Factor calibration requires Tagger and PS calibration.
#** Energy calibration of tagger microscope is ok, the issue is in some "cable swap" that was not yet addressed on the translation table see: [https://logbooks.jlab.org/entry/4156839 logbook]
# CCDB Constants Status (Elton)
#* [[Media:CCDB constants CPP.png]]
# REST Production
#* [https://halldweb.jlab.org/halld_versions/version_5.17.0.xml version_5.17.0.xml]
#* Plugins:
#** skims: evio_writer,randomtrigger_skim,ps_skim,trigger_skims,syncskim,npp_skim,cpp_skim
#** analysis and monitoring: cpp_hists,npp_hists,FMWPC_online,FMWPC_Performance,FCAL_cpp
#** polarization: TPOL_tree,PS_flux
#* Other special setting:
#** ''KALMAN:ADD_VERTEX_POINT 1''
#** Write out hit objects (FMWPC, CTOF, FCAL?): ''PID:ADD_FCAL_DATA_FOR_CPP 1''
# Data Analysis
#* [[Media:Pi0pi0missprot_upload.pdf| <math> \pi^{0} \pi^{0} (p) </math> update (Iesa)]]
#* CTOF and MWPC Offline Monitoring (Albert)
#* [https://halldweb.jlab.org/wiki/images/c/c2/Glue-cpp-npp-igal-jaegle-31072024.pdf Primakoff photoproduction off <math> \pi^{0} </math> and <math> \eta </math>] (ig)
# Wiki Page [[Analysis_Overview]]
# Documentation
# Upcoming Presentations
# Other business
# Next meeting

== Minutes ==

''Attending:

== Docs/Files ==
in: /u/group/halld/www/halldweb/html/talks/2024/CPP/  link: This directory is accessible from the web at [https://halldweb.jlab.org/talks/2024/ https://halldweb.jlab.org/talks/2024/CPP]