• Created by Unknown User (hovanes), last modified on Nov 04, 2013

Time and Location

3pm Eastern time

Room F228 in F-wing at JLab

Agenda

  • SVT power supply and chiller interlocks [Hovanes,Pelle]
  • Beamline [Krister]
  • EPICS for ECAL monitoring system [Ken, Bryan]
  • ECAL voltage GUIs [Bryan]
  • Other business

Minutes

Present at JLab: Neres, Stepan, Krister, Bryan, F.-X., Ken, Hovanes

Present at SLAC: Pelle

SVT Interlock

Hovanes discussed his proposal for hardware  the SVT interlocks:

  • The overall cost is expected to be on the order of $6K. In addition, we can expand it to include 3 more thermocouple input modules.
  • According to the Andreas Rubin from Wiener, the old controllers for MPOD with LEMO connectors do not have the circuitry wired. We need to buy new controllers to have the controller-wise interlocks.
  • Pelle suggested to go with the controller fast-shutdown signal to turn of all the channels on the chassis. Only one MPOD chassis will be required y SVT, and ECAL LV will not be served from the same chassis.
  • F.-X. suggested to use fast shutdown (FSD) signal from the accelerator to turn off the power supplies, but not the chiller. The idea was supported by the overwhelming majority. 
Beamline

Krister did not have time to work on HPS controls, busy with the superconducting magnets for CLAS12. No progress with the magnet controls. Hovanes agreed to send Krister a time-ordered list of tasks for HPS controls that Krister needs to work on.

Sergey needs to know the list of the IOCs and the type of the controllers to be installed in Hall B for HPS slow controls.

We need to connect the Frascati magnet on the space frame to mini-T power supply soon to ramp it up to 1050 Amps and to measure the field. No EPICS controls are needed.

 

ECAL light monitoring system and ECAL voltage GUIs

Ken Livingston from Glasgow told us the the control modules for the HPS ECAL and CLAS12 forward tagger calorimeter are identical. Therefore, Glasgow will provide the EPICS support for the ECAL monitoring system.

Bryan McKinnon from Glasgow will work on the ECAL and SVT voltage GUIs in EPICS. The preliminary plan is to create one main voltage GUI for ECAL and SVT, and then use CLAS scripts and programs to generate the detailed GUIs displaying the voltage parameters. 

Stepan will send Hovanes, Nerses and F.-X. an Excel spreadsheet with the new HV grouping for ECAL.

The location of the CAEN SY1527 crate used for CLAS DVCS is not known. Sergey probably knows the location of the crate.

 

 

 

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