[Halld-pid] Time-of-Flight Meeting Minutes, April 8, 2020

[Mark Ito]

Folks,

Please find the minutes here 
<https://halldweb.jlab.org/wiki/index.php/GlueX_TOF_Meeting,_April_8,_2020#Minutes> 
and below.

   -- Mark


    GlueX TOF Meeting, April 8, 2020, Minutes

Present: Edmundo Barriga, Eugene Chudakov, Paul Eugenio, Mark Ito 
(chair), Simon Taylor, Beni Zihlmann

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


      Review of minutes from the last meeting

We went over the minutes from March 11 
<https://halldweb.jlab.org/wiki/index.php/GlueX_TOF_Meeting,_March_11,_2020#Minutes>. 
Beni reminded us that changing out the FADC fixed the issue seen in the 
monitoring plots that we were dealing with at the time.


      Calibration

Beni reported that the calibration effort for the last runs of the 
recent running period were stalled due to lack of TOF root files. Sean 
got those jobs started again on Monday, they are starting to come in, 
and Beni has been processing them. He noted that the calibrations for 
the beginning of the run have been complete for some time and the 
reconstruction of those runs is not holding on TOF constants.

Beni also performed calibrations for the PrimEx running period. Only a 
few of the runs can be tested since the test requires tracking. For the 
runs that he was able to check, the resolutions looks good.


      Software Issues

Igal Jaegle has reported seeing "stripes" in the spatial distribution of 
charged tracks matched to the TOF that look like they are correlated 
with vertical counters in the downstream layer of the TOF. Simon and 
Beni are helping him understand the anomaly.


      TOF NIM paper

Paul reported that work continues on the paper. Sasha Ostrovidov is 
working on the section on testing.

Beni reminded us of the location of the Overleaf site 
<https://www.overleaf.com/project/5d5fe70448badb5a9fff112e>.


      PMT Replacement Capability

Paul reminded that the last time he was a JLab, he brought up a fixture 
for replacing TOF PMTs /in situ/. He has initiated the project to make 
six of them; materials have been ordered.

Beni says some PMTs may need replacement soon. One in particular is 
worrisome. Beni will go through the PMTs individually and assess viability.


      Health

All participants reported that they are in good health.

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  * This page was last modified on 8 April 2020, at 12:21.

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