[Halld-pid] Time-of-Flight Meeting Minutes, February 13, 2019

[Mark Ito]

Folks,

Please find the minutes here 
<https://halldweb.jlab.org/wiki/index.php/GlueX_TOF_Meeting,_February_13,_2019#Minutes> 
and below.

   -- Mark

_____________________________________


    GlueX TOF Meeting Minutes, February 13, 2019

Present:

  * *FSU: * Sasha Ostrovidov
  * *JLab: * Thomas Britton, Ashley Ernst, Mark Ito (chair), Simon
    Taylor, Beni Zihlmann

There is a recording of this meeting <https://bluejeans.com/s/oxwox/> on 
the BlueJeans site. Use your JLab credentials to access it.


      Announcement: Machine Learning and the TOF

Thomas told us that ML-based online monitoring needs experts to label 
histograms. He has conscripted Beni to do so for the Time-of-Flight. The 
automatic system is trained on PNG files from the online monitoring 
program. It is doing well on the FCAL occupancy plots, with a false 
positive rate of less than 2%. Colin Gleason did the training for the 
FCAL in 20 to 30 minutes.


      Review of minutes from the January 30 meeting

We went over the minutes from last time 
<https://halldweb.jlab.org/wiki/index.php/GlueX_TOF_Meeting,_January_30,_2019#Minutes>. 


  * Mark reported that Tim Whitlatch is going to *get a designer*
    (probably Stephanie Worthington) *going on Paul's upgrade ideas*
    sometime in the next few weeks.
  * On Monday, Mark and Ashley made a *tagged release of HDDS* with (a)
    the Lucite shielding, (b) *no DIRC,* and (c) overlaps resolved. They
    leveraged Richard Jones additions and corrections to Ashley's
    initial draft of the shielding. The release was produced by using
    version 3.13 as a base and importing HDDS XML files from the CCDB
    for run 41000, i. e., a pre-DIRC run.


      Lucite Shield Geometry

Ashley ran us through slides from Richard that detailed his validation 
of the shield geometry. He identified and performed three classes of 
verification (slide 4):

 1. alignment verification (look at pictures)
 2. geometry verification (checks proper embedding, overlaps)
 3. functional verification (run HDGeant4 and analyze hits)

Please see his slides 
<https://halldweb.jlab.org/talks/2019/tof_shielding_sim-2-2019.pdf> for 
the details and the plots.

Added in press: Ashley reported some clarifications she obtained from 
Richard.

 1. There is a swap in plot positions between the low energy photon
    simulation. and the coherent bremsstrahlung beam simulation. The
    former shows the situation with shielding on the left and without
    shielding on the left. The latter is the reverse.
 2. The DIRC was present in all simulations.

Retrieved from 
"https://halldweb.jlab.org/wiki/index.php?title=GlueX_TOF_Meeting,_February_13,_2019&oldid=91262"

  * This page was last modified on 13 February 2019, at 12:34.

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://mailman.jlab.org/pipermail/halld-pid/attachments/20190213/e7554c92/attachment.html>