Electronics Shift

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Electronics Shift Jump to: navigation, search Contents

[hide] 
   1 Electronics
   2 Checking settings
   3 Routine Operation
   4 Expert On Call

[edit] Electronics

The Electronics consists of all the equipment related to the detector readout through the data acquisition. These include frontend detector electronics, data converter readout modules, high and low voltage systems and distribution, cabling, crates, chassis and racks.


[edit] Checking settings

Before starting the run the shift operator should follow the run configuration requirements and perform the following actions:

   check that all the GUIs show correct operation and settings within each specific detector sub-system. The power supplies and controls should be within the nominal operating voltages and currents.
   check that no interlock flags have been set. These include HV disconnections, temperature levels, cooling system status, alarms.
       Contact the appropriate sub-system expert if necessary. 
   check that the VXS, VME, CAEN HV and Wiener LV chassis are operational. Certify that the temperature in the hall is about 21 degree C or 70 degree F; the VXS fans should be set to 4,000 RPM.

[edit] Routine Operation

The shift crew should monitor sub-system performance within their respective GUIs and verify correct operation:

   HV, LV (includes SiPM bias where applicable), Chassis/Crate operational temperature and fan speed
   Replacing modules: orientation guidance provided by an expert and familiarity with standard operations is necessary. Carefully replace modules and log all the following information in JInventory: module type, serial number, description of defect, date of occurrence, person performing replacement, newly installed module. Notify expert via email with the same information so that problem can be investigated and an adequate number of spare modules will be available.
   Changes to cabling, grounding, equipment and configuration are not permitted without prior approval from the chief electrical engineer. This includes bringing any equipment into the halls. Additionally, all the cabling and equipment must conform to the following standards:
   Cabling & Installation: NEC NFPA 70 UL CL2 or better, NECA/NEMA 105-2007 
   EMC/EMI/RFI: FCC part 15 Class B, CISPR 11/ EN 55011 Class B, CISPR 22/ EN 55022 Class B and EN 61000-6-3


[edit] Detector Expert On Call

The individuals responsible for approving and checking that the Electronics conform to the design standards are shown in following table. Problems with normal operation of the Electronics should be referred to those individuals and any changes to their settings must be approved by them. Additional experts may be trained by the system owner and their name and signature added to the document residing in the Hall D Counting House.


Table: Expert personnel for the Pair Spectrometer system Name Extension Date of qualification Fernando J Barbosa 269-7433 June 16, 2014 Nick Sandoval 269-6506 June 16, 2014 Chris Stanislav 269-6506 June 16, 2014