[Halld-jlab] Hall D Staff Meeting Minutes, July 11, 2016
Mark Ito
marki at jlab.org
Mon Jul 11 18:39:12 EDT 2016
Folks,
Please find the notes below and at
https://halldweb.jlab.org/wiki-private/index.php/Hall_D_Staff_Meeting,_July_11,_2016
.
-- Mark
________________________
Hall D Staff Meeting, July 11, 2016
From Gluex PRIVATE Wiki
Present: Alexander Austregesilo, Eugene Chudakov, Mark Dalton, Alexandre
Deur, Hovanes Egiyan, Sergey Furletov, Mark Ito, Vanik Kakoyan, David
Lawrence, Paul Mattione, Lubomir Pentchev, Patricia Rossi, Elton Smith,
Sascha Somov, Justin Stevens, Simon Taylor, Tim Whitlatch, Zhenyu Zhang,
Beni Zihlmann
Eugene
* Students who defended recently: Eric Pooser, Manuel Lara, Aristeidis
Tsaris, Hussein Al Ghoul, Will Levine
Patrizia
* returned from EIC Users' Group meeting at Argonne
* discussion of how to prepare for National Academy of Sciences review
o heard from FRIB person on their experience
* discussion of how to involve international community
o 2 reps from INFN, 1 from France, 1 from UK
o proposal: users group meeting in Italy
* talks on machine design, one from JLab, one from BNL
Tim
* target cell removed, being measured today
* issue with HVAC in Hall, got too chilly
* crate issue today: running at 6,000 RPM
* Aug. 9: Hall in controlled access for emergency management exercise
* solenoid: replacing transistor banks, finding new burnt spots
* StayTreat: discussion of gradients, cavities, radiation damage to
machine components, RF separator improvements for Fall
David
* Level 3 work: 1/4 of physics events reconstructable
o only 10% near beamline meet the criteria
o BDT retains 25% of background, retains 90% of good events
* simulation for CPP work
* RAID server: need to re-specify for order
Elton
* worked on proposal for beamdump experiment behind Hall A
o 285 PAC days requested
* calorimeter reconstruction
o split-off dealt with better after Will McGinley's work
o discrepancy between MC and data, MC pi0 peak wider
* reconstruction for pi+pi- for CPP
o doing rho production
o 17% reconstruction efficiency, needs to be understood
Simon
* adding drift times to FDC track fitting
o working now
* doing pass on recent reconstruction launch data, re-doing
multi-photon state analysis
Alexander A.
* took over reconstruction launches
o batch 4 almost finished
o link on main wiki page
o only small problems
* FDC reconstruction, eye to implementing timing
o found areas for improvements
* submitted abstract for APS meeting on rho polarization
Justin
* rho polarization as a function of beam energy
o mysterious polarization below coherent peak
o looking at diffs among diamonds, beam current levels
o experimental methods agree, see anomalous effect
* working with Jane on pi0 asymmetry measurement
* Level 3: resurrected BDT algorithm
o passed on the Adesh Subedi
Sascha
* trigger efficiency, rho events
o "not bad", 75% in data, must mask hot rings in FCAL
o in MC 85%, after correcting for min. ionizing effect, 90%
o will look at other channels
* new FADC firmware
o FCAL, BCAL, one crate each
o doing tests
* with Josh Crafts, mag. field effect measurements for PrimEx
prototype calorimeter
* tagger hodoscope repairs
* preping for PrimEx readiness review
Mark I.
* new release: 2.1.0
* RCDB deployed as part of standard build
* C++11 features now allowed for simulation and reconstruction code,
modifications in scripts setup, tests (nightly, b1pi)
* updated list of JLab shift takers
* write-through cache adjustments
o small files clean-up
o forced write and pin
o get and pin
o leader board software for cache
* Advanced Scientific Computing Research (ASCR) case study for GlueX
and Hall D
* preparations for sim1.1
Beni
* TOF: tested spare PMT
o reproduce behavior seen in Hall with laser
o at high rate, amplitude collapses
o at 1300-1400 V, 150 mV pulses, PMT handles rates to 10 MHz
o brighter pulses also collapse amplitude
o tested 8-stage PMT from Paul Eugenio
+ same behavior, lower voltages OK up to 10 MHz
o effect on timing resolution no known
o FSU doing test on cosmic test stand
* giving pizza seminar next week
Paul
* working on CLAS analysis last few weeks
* will do analysis launch in a few weeks
o run users analysis plugins against REST data
* preparing to analyze some channels
* will look at track reconstruction efficiency
Sergey
* looking at new improvements in software and in new CODA software
* performance testing planning underway
* development of F125 firmware
Lubomir
* using genfit to look at performance of FDC in mag. field
* see resolution < 200 microns down to 150
* single track comparison with Simon; differences understood and corrected
Hovanes
* with Vanik, microscope support motion work
o to adjust orientation with respect to electrons
o one actuator acting differently, will swap encoder
* looking at MCB simulation code from Mainz
o simulate photons at face of collimator
o working, next: compare to scan taken during last run
* modification to goniometer control
o use wire for scans
* collimator stage will get reworked in Sep.
o replace switches, add vertical motion
Alexandre
* with 4-operation will have additional source of bleed-through
o 4 lasers but only 3 slits
o still will have bleed-through from old source
* problem with manpower in MCC during run
o will be worse for 4-hall operation
o fast access for Hall D will help
* looking at Hall D beam energy history
o see 170 MeV drifts, some real, some fake
o made a table, anti-correlated with energy drifts in arcs
o anti-correlated with Hall A
Mark D.
* simulation of Bethe-Heitler production
* help with parity violation in resonance region proposal in Hall C
* next: BCAL efficiency study
Retrieved from
"https://halldweb.jlab.org/wiki-private/index.php?title=Hall_D_Staff_Meeting,_July_11,_2016&oldid=1068"
* This page was last modified on 11 July 2016, at 18:37.
* This page has been accessed once.
--
marki at jlab.org, (757)269-5295
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://mailman.jlab.org/pipermail/halld-jlab/attachments/20160711/cc4699b0/attachment.html>
More information about the Halld-jlab
mailing list