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Sept 21/22 PionLT/KaonLT Analysis Meeting Notes
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(Notes by GH and SJDK)
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Today: KaonLT will be discussed first
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Please remember to post your slides at:
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https://redmine.jlab.org/projects/kltexp/wiki/Kaon_LT_Meetings
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Present:
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Regina - Stephen Kay, Garth Huber, Nathan Heinrich, Vijay Kumar, Alicia Postuma
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Muhammad Junaid, Love Preet, Ali Usman
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FIU - Pete Markowitz
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Ohio - Jacob Murphy, Julie Roche
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CSULA - Konrad Aniol, Emery Mark Gunselman, Erika Gwin
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CUA - Richard Trotta, Tanja Horn
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Glasgow - David Hamilton
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Discussion before we start:
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- CaFe is running a different trigger setup. Coin and 3/4 arriving at the
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same time?
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- GH is interested in finding out about the data they took for "proton
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absorption correction" and "Heep normalization"
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- Konrad introduces Emery and Erika, two 1st year Masters students who've just
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started. Cal state has an interest in Hall A as well as Hall C
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Richard Trotta Updates
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----------------------
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- KaonLT Lumi Analysis
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- Scaler yield calculation
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- using pTrig3=ELREAL
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- Had CPULT applied. Now removed and things look better, although
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scaler yield still increases with current
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- Cuts shown for Tracked vs Non-Tracked analyses
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- Cuts are a little on the tight side
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- Cuts are all lower bound, no upper bound cuts, so should be okay
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- Tracked yield calculation has the total efficiency
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- Tracking efficiencies in report file
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- Jacob points out that we could have Evttype == 3 too
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- Tracked yield drops very quickly with current, definitely an issue!
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- How old is the replay? From May
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- *Reminder: *SHMS was pi+ polarity for one scan, e- for everything else so
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the PID cuts used for the pi+ Lumi scan will be much different than for
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all other scans
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- -ve polarity lumi scan runs have low TLT
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- +ve polarity lumi scans have some issues with the cuts included in the
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replay
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- planning to implement Aerogel Tray cut for +ve runs
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- Seem to be a couple of issues tied to replay
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- 6p2 GeV Lumi scans - very low TLT
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- Low beam on time. Possibly tied to the >5uA current cut?
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- Could also be linked to cuts defined in the DEF-CUTS file
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- GH: Please add a plot of the actual DAQ rate so we can see whether low
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CPULT and TLT makes sense or not
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- Ali: made subtle changes to the event selection to enable tracking
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efficiencies to be calculated for multiple event types
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- was restricting event type after decode EDTM info
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- now doing ALL events
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- not sure whether this will affect Lumi analysis or not
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- Bill's LT-sepaaration section code
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- Richard going through code to understand and get it working
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- Original code was a little messy, unclear variables etc
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- Lots of hard coding, particularly in analysis.cpp
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- Setting up pathing for filenames after analysis
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- it is inevitable that some hard coding will remain, since the number of
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SHMS angles is different at high/low epsilon for different settings
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- making backend scripts for plotting that are separate for each setting
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that can be called by master scripts as necessary
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- GH/TH ask him to post some notes as part of code documentation, kaonlt log
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- RT will post notes in sections as they are completed
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- will try to have a working version to show in 2wks
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- GH will go again through his LT-separation tutorial next Tues @ 12:00 EDT
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- To do/upcoming
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- Calorimeter calibrations
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- HGCer efficiency calculation
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- Ali has some notes on this
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Ali Usman Updates
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-----------------
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- Total efficiency per run
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- All efficiencies and LTs multiplied together
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- HMS ElTrack
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- SHMS ProtonTrack
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- Hodo 3/4 (both)
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- Need to verify how hcana actually calculates the hodoscope
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efficiencies
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- EDTM LT
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- HMS Cherenkov
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- Effective Q=Total Eff * Q
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- sum Effective Q for all runs in a setting
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- yield Y=Counts/Effective Q
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- Heep Coin Data/SIMC comparisons
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- with latest replay, gbeam.parm fixed
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- Comparison looks good, but plots include too many types of data
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(unsubtracted, w/o cuts, etc) and this partly obscures the comparison
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- Future versions should only be the two things we actually want to
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compare
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- Data 3% low compared to MC
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- still need to apply cryotarget boiling and proton absorption, so we
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might eventually with data a bit too high compared to MC
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- Need to finalise offsets for KaonLT data (all of it)
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- Ali and Vijay will work together to try to find offsets that aren't too
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different from each other, if possible
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- Tanja shares the Fpi-2 logbook
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- https://hallcweb.jlab.org/fpilog/
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Username: hms Password: sos
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- Fpi-2 website
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- https://hallcweb.jlab.org/experiments/fpi/FPI_PHASE2/
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Vijay Kumar Updates
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-------------------
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- Updated gbeam.param file
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- Switched to one Dave G had recommended
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- Should now have consistent param files with Ali/Richard
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- Working on Lumi study
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- Low energy PionLT data
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- Ran into some issues with
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- Summer 2019 data gbeam.param?
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- Do we need a new file?
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- Dave G has a script that gives some of the beam on target parameters that
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go in the file
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- it should be the same as KaonLT except for this change
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Stephen Kay Updates
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-------------------
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- Merged in new online updates to offline branch
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- Should not be any conflicts
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- Scripts are compartmentalised in UTIL directories
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- Merger doesn't cause any issues with this
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- Should start to organise PionLT param and DB files as we did with KaonLT
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- Ali did some organization of KaonLT param
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- every detector is organized in directories
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- better isolates for chagnes, to avoid overwriting
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- also need to trim down std.kin, just PionLT settings
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- Nathan: we should make these changes as we begin doing the calibs
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Jacob Murphy Updates
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--------------------
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- will start with HGC, NGC calibs
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- HMS Optics work
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- first optics pass for HMS 6.8GeV calibrations
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- Small issue where it's not getting the correct ytar value?
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- Look at where holes end up from all three foils
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- Jacob demonstrates why we meed the 6 GeV optical matrix
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- Peaks in H.gtr.y blend into each other if the wrong one is used
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- Ysieve resolution much better than Xsieve for some settings
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- possibly saturation effects larger for Ysieve?
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Next meeting: Wed Sept 28 @ 9:00 Eastern/7:00 Regina/6:00 Calif
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- Jacob will start first next time
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- ask to give some intro on the optics fitting for those less familiar
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