Page History

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• Hovanes and Sergey got an MPOD crate from CLAS12 SVT for temporary use with 3 low voltage and 3 bias boards.
• Hovanes started an IOC on clonioc2 server in the counting house. The IOC at this time has the bias voltages and FE LV channels.  
• The IOC is using the Hall D scheme (Nerses) for configuring the EPICS DB based on the MPOD chassis content and on a SQLite DB for detector hierarchy.
• The mapping of the detector channels into the MPOD channels is arbitrary at this point. Pelle will create an Excel file with the correct mapping and send to Hovanes. 
• Bryan gave a presentation on his progress on the SVT voltage control GUIs. 
  • Bryan crated an overview GUI for SVT voltages and the detail view for the voltage parameters for the bias voltages and FEC voltages. 
  • Pelle asked Bryan to setup a button for group operations (at this point just ALL CHANNELS grouping, but in the future TOP and BOTTOM group operation might be needed).  
• Pelle reported that Ryan and himself will meet with an EPICS expert to discuss and start working on the DAQ CA server for voltages and the SVT temperatures. 
• Ani Simonyan started working on the alarm configuration for the SVT voltages.
• Still unclear when would the right time be for Bryan to travel to SLAC to setup SVT voltage controls in EPICS. 

Motor setup

• Hovanes reported that I it was decided to use a Newport XPS-Q8 motion controller for the HPS SVT motor control.
• Most applications will not be affected much by this change with the exception of scans. Hall D is using these controller and the scan procedure will be developed together with Hall D folks. 
• Armen from JLab Fast Electronics group is working on the three SVT motor cables. He is ordering the cables and connectors.  
• Ani Simonyan (Yerevan) will start working on the scan software in April. 
• For now the other six motors will be using the Hall B standard scheme with OMS drivers. IF If we decide to move some of them to XPS, then we will use short adapter cables to connect them to XPS. 

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• Stepan ordered a chiller that will first be used for ECAL test, and later will be used for the SVT FEC cooling. 
• Since this chiller will also be in vacuum, it needs to be interlocked similar to the main SVT chiller (Pelle). 
• A bypass circuit with solenoid valves will need to be installed on the chiller for the interlock to be able to shut off the coolant flow. 
• A mass flow meter will need to be installed in the piping to be able to shutoff the power supplies when there is not sufficient flow of coolant. 

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