[Halld-jlab] Hall D Staff Meeting Notes, April 17, 2017
Mark Ito
marki at jlab.org
Mon Apr 17 17:04:57 EDT 2017
Please find the notes below and at
https://halldweb.jlab.org/wiki-private/index.php/Hall_D_Staff_Meeting,_April_17,_2017
.
Hall D Staff Meeting, April 17, 2017
From Gluex PRIVATE Wiki
Present: Thomas Britton, Eugene Chudakov (chair), Mark Dalton, Alexandre
Deur, Hovanes Egiyan, Sergey Furletov, Mark Ito, David Lawrence, Paul
Mattione, Lubomir Pentchev, Patrizia Rossi, Elton Smith, Sascha Somov,
Simon Taylor, Beni Zihlmann
Contents
* 1 David
<https://halldweb.jlab.org/wiki-private/index.php?title=Hall_D_Staff_Meeting,_April_17,_2017&printable=yes#David>
* 2 Sergey
<https://halldweb.jlab.org/wiki-private/index.php?title=Hall_D_Staff_Meeting,_April_17,_2017&printable=yes#Sergey>
* 3 Elton
<https://halldweb.jlab.org/wiki-private/index.php?title=Hall_D_Staff_Meeting,_April_17,_2017&printable=yes#Elton>
* 4 Simon
<https://halldweb.jlab.org/wiki-private/index.php?title=Hall_D_Staff_Meeting,_April_17,_2017&printable=yes#Simon>
* 5 Alex A.
<https://halldweb.jlab.org/wiki-private/index.php?title=Hall_D_Staff_Meeting,_April_17,_2017&printable=yes#Alex_A.>
* 6 Alexandre D.
<https://halldweb.jlab.org/wiki-private/index.php?title=Hall_D_Staff_Meeting,_April_17,_2017&printable=yes#Alexandre_D.>
* 7 Sascha S.
<https://halldweb.jlab.org/wiki-private/index.php?title=Hall_D_Staff_Meeting,_April_17,_2017&printable=yes#Sascha_S.>
* 8 Thomas
<https://halldweb.jlab.org/wiki-private/index.php?title=Hall_D_Staff_Meeting,_April_17,_2017&printable=yes#Thomas>
* 9 Hovanes
<https://halldweb.jlab.org/wiki-private/index.php?title=Hall_D_Staff_Meeting,_April_17,_2017&printable=yes#Hovanes>
* 10 Mark I.
<https://halldweb.jlab.org/wiki-private/index.php?title=Hall_D_Staff_Meeting,_April_17,_2017&printable=yes#Mark_I.>
* 11 Beni
<https://halldweb.jlab.org/wiki-private/index.php?title=Hall_D_Staff_Meeting,_April_17,_2017&printable=yes#Beni>
* 12 Lubomir
<https://halldweb.jlab.org/wiki-private/index.php?title=Hall_D_Staff_Meeting,_April_17,_2017&printable=yes#Lubomir>
* 13 Paul M.
<https://halldweb.jlab.org/wiki-private/index.php?title=Hall_D_Staff_Meeting,_April_17,_2017&printable=yes#Paul_M.>
* 14 Mark D.
<https://halldweb.jlab.org/wiki-private/index.php?title=Hall_D_Staff_Meeting,_April_17,_2017&printable=yes#Mark_D.>
* 15 Senior Staff, Elton
<https://halldweb.jlab.org/wiki-private/index.php?title=Hall_D_Staff_Meeting,_April_17,_2017&printable=yes#Senior_Staff.2C_Elton>
* 16 OST/TOSP Guidance, Patrizia
<https://halldweb.jlab.org/wiki-private/index.php?title=Hall_D_Staff_Meeting,_April_17,_2017&printable=yes#OST.2FTOSP_Guidance.2C_Patrizia>
David
* preparations for L3 mini-review
o meeting held last week
* Geant3 vs Geant4 comparison work (with Elton)
* creating a "back" button for the new event display
Sergey
* work on L3 review -- performance improvements
o CODA 3.07 testing
+ 2-stream writing, fixed now
+ multi-threaded event building, problems encountered
* TRD performance studies with Lubomir
o getting agreement with MC
o will report at future meeting
Elton
* CPP MC work, simulating ρ→π^+ π^−
o putting in S-wave
o using MCwrapper
o comparing Geant3 vs. Geant4
+ resolution for forward tracks much worse in Geant4, issue
not resolved
+ proton track in CDC comparable between G3 and G4
Simon
* preparations for resubmitting JEF proposal
* cross section measurements
* improved matching to start counter
o change approach to swimming track toward start counter plane
Alex A.
* preparations for reconstruction launch
o monitoring launches done
o Sean D. working on calibrations
o final test this week
o yields higher for low intensity running, but calibrations for
high intensity behind
* started amplitude analysis working group
o now: spin density matrix elements
o GlueX-specific
o meet every other Monday
Alexandre D.
* writing review on spin structure functions
* testing new perturbative QCD procedure, using α_S at medium energies
* analysis of GDH experiment in Hall B
* beam energy in Hall D, understanding
* get Fast Access going for Hall D
o all equipment in place now
Sascha S.
* trigger
o long busy signal leads to crashes occasionally
+ TI/TD mis-communication
* Primkoff
o CompCal
+ Hall C ordering crystals, PMTs
+ testing dividers from Vladimir P.
+ can take 2 MHz with 2% deviation from linearity
o liquid helium target
+ Chris K. has liquefied helium at 4 K with augmented heat
shielding
+ will repeat with more realistic configuration
+ simulating method for monitoring target boiling
o ready for review in June, perhaps
* JEF
o simulating rare decay
* Nuclear target proposal
o worked on data analysis
Thomas
* MCwrapper, designed with low barrier to entry
* cross section for φ→KK
* event viewer work with Dmitry R.
* run browser performance speed-up work
Hovanes
* Goni repair work, with Tech Staff
o work on pitch stage in EEL
o took apart, changed electronics, re-assembled
o can do maintenance/repair here at Lab
o question on how to align stages, probably use Survey Group
* TAC: incorporate into ROOTSpy for monitoring
Mark I.
* added gluex ROOT analysis to standard build
* worked on gluex_install
o complete build from scratch
o incorporate Geant4, HDGeant4, gluex ROOT analysis
Beni
* TOF calibration
o re-do with finer data grid
* timing calibration help for PS hodoscope
* TOF PMTs look OK, not replacing them this summer
o continue to look at Vladimir's divider design
+ test counter set-up in ESB
+ can inject light from an LED into counter at high rate
* analysis: neutral events with π^0 's -- look for proton in start
counter only
o perhaps a way to access low t
Lubomir
* J/ψ from 2017 monitoring data
o get 30 more J/ψ's
o factor of 3 more φ's
o using only angles, can avoid using kinematic fit
Paul M.
* analysis library
o re-factoring to make more efficient, core code only
o ready for test in a few weeks
* CLAS paper
o passed committee review
* Launches
o waiting for alignment calibrations from Mike S.
o will re-run 2016 golden period
o 2017 data waiting on BCAL calibrations
Mark D.
* BCAL calibration, 4 ns offset in 2017 data
o need run-by-run calibration
o looking at TDC as standard to find ADC shifts
o after done, go on to attenuation length, gain, end-to-end timing
calibrations
Senior Staff, Elton
* ACC will try to run with 4 of 5 compressors for south CHL
o likely will result in more trips
OST/TOSP Guidance, Patrizia
* new web page in "For Scientists" section to guide newbies in writing
these
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--
marki at jlab.org, (757)269-5295
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