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

[Mark Ito]

Correction to clarification 2, it should read:

For both simulations the two geometry arrangements were (1) with shield, 
without DIRC and (2) without shield, with DIRC.

On 2/13/19 12:37 PM, Mark Ito wrote:
>
> 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://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fbluejeans.com%2Fs%2Foxwox%2F&data=02%7C01%7Cmarki%40jlab.org%7C6481c56ecb234ed16e8708d691da0075%7Cb4d7ee1f4fb34f0690372b5b522042ab%7C1%7C0%7C636856762829889999&sdata=5NkwLAmMq1SvP8mFJzWT0rBxiKt8klaA7qpG0OAL7MA%3D&reserved=0> 
> 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.
>
>
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