[Halld-pid] Start Counter Meeting Minutes, December 3, 2015

[Mark Ito]

Folks,

Please find the minutes below and at 
https://halldweb.jlab.org/wiki/index.php/GlueX_Start_Counter_Meeting,_December_3,_2015#Minutes 
.

   --  Mark
_________________________________________________________________________________


  GlueX Start Counter Meeting, December 3, 2015, Minutes

Present:

  * *FIU*: Werner Boeglin, Mahmoud Kamel
  * *JLab*: Mark Ito (chair), Eric Pooser, Simon Taylor, Beni Zihlmann


      Run Readiness

Eric went to the Hall yesterday to go through the Hot Checkout List. He 
and Nick Sandoval found 3 dead channels. On the scope there is a large 
DC offset on them; it looks like a loose connection between the ST-1 and 
ST-2 boards. Also Eric could not see output on the FADC scalers. He 
thought this might be related to changes in the ST crate to add the TRD 
(spare FDC package) read-out to the crate (some F125s). The signals look 
good at the front panel of the FADCs.

This morning at the Run Planning meeting it was announced we will not 
pull back the start-counter/target cart to fix the dead channels.

Eric will try soon to read-out the start counter via the DAQ in any 
case. The start counter remains un-checked in Hot Checkout.


      Calibration

Mahmoud is going through Eric's code to do the light propagation delay 
calibration. He sees clear separation of times when referenced to the RF 
signal, both for the time-of-flight and the start counter. This is 
work-in-progress.

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  * This page was last modified on 3 December 2015, at 13:50.


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