[Halld-pid] Time-of-Flight Meeting Minutes, October 25. 2017

[Mark Ito]

Folks,

Turnsou that there was a meeting after all. Find the minutes below and 
at 
https://halldweb.jlab.org/wiki/index.php/GlueX_TOF_Meeting,_October_25,_2017#Minutes

  - Mark

___________________________________


    Minutes

Present:

  * *FSU*: Sasha Ostrovidov, Brad Cannon
  * *JLab*: Thomas Britton, Simon Taylor, Beni Zihlmann

There is a recording of this meeting <https://bluejeans.com/s/EjILh/> on 
the BlueJeans site.


      Announcements

None


      Review of minutes from the previous meeting

We reviewed the minutes from the previous meeting 
<https://halldweb.jlab.org/wiki/index.php/GlueX_TOF_Meeting,_September_27,_2017#Minutes>. 



      Calibration

Code for TOF Hit factory has been updated. The default time window for 
matching ADC and TDC hits has been increased from 10 to 20ns to match 
the output signal width of the discriminators. The code was modified to 
NOT overwrite already found matches with new TDC match but instead make 
new Hit.


      PMT testing

The new HV power supply sent to FSU already stopped working. Us single 
channel module for now. Gain measured for 10 PMTs. The measured gains 
differ from the factory values by +/- 10-20% this is more than 
previously seen. One PMT seems to have very low QE.

[2] <http://hadron.physics.fsu.edu/%7Eostrov/tof/20171025/>

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