[Halld-cal] Cal Working Group Meeting this morning

[Elton Smith]

Dear collaborators,

We will have our Cal Working Group meeting this morning at 10 am. See 
agenda below.

Note to JLab collaborators: Due to the Science Bowl preparations we have 
lost our room for the day. Let's meet in F326 and hope that they don't 
get around to moving things around in F326 till after the meeting is over.

Cheers, Elton.




= Tentative Agenda =

# Announcements
#* [[GlueX-Collaboration-Feb-2014|Collaboration Meeting Feb. 20-22]]
# Action Items
# Monitoring
# FCAL
# BCAL
# BCAL Interlocks 
[https://mailman.jlab.org/pipermail/halld-cal/2014-January/000857.html 
see e-mail] Elton)
## Need to provide input to Dave Butler as he implements the PLC logic 
and interlock systems for each detector.
## Chiller trips (or is off) -> turn HV and LV power off to MPPCs. Note: 
Probably it is only necessary to turn off the LV, but both are in the 
same crate, and I prefer turning them both off
##* We need to investigate the capabilities of the chiller to implement 
this and find a cable to connect to the MPOD crate
## For each side of the BCAL: Compute the dew point from temperature and 
humidity measured in the 4 sensors. Turn LV and HV off if temperature on 
cooling plate is close to dew point (e.g. less than 5 deg).
##* This calculation would be done in the PLC and the signal sent to the 
MPOD crate ORed with the signal from the chiller. This probably means it 
makes sense to send the chiller signals into the PLC and create an 
output that would shutdown the crate if either condition is satisfied.
## Note that shutdown can be relatively slow, as the time scale for 
environmental changes is ~ minutes.
## Note from Fernando: Insure that + and - 5 V power inputs to the BCAL 
readout is balanced. In particular, if one polarity is lost, the other 
should be turned off also. This will probably be implemented in EPICs.
# Reconstruction and Simulation
# TDR update
# Calibration
# Any other business

-- 
Elton Smith
Jefferson Lab MS 12H5
12000 Jefferson Ave STE 16
Newport News, VA 23606
(757) 269-7625
(757) 269-6331 fax