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Action items, nonstandard connections, and known problems
as of  April 10th,  2006

 


  • Action Items - next access:
    • Reinstall Avalanche LV readout board after modification. No power supply LV readback until then. LV currents are still operational.
  • Nonstandard Connections:
  • High Voltage:
    • The following previously sparking chambers no longer have individual current readout. They have been connected via HV reversing extensions and individual long haul cables to a positive supply in the EH. The supply voltage is on the nominal ground side while the E field direction is kept the same by using an opposite polarity HV
      • RPC ID---------Cable--- High Voltage Splitter---HV channel
      • FE_6TU-----------E16-----------------81a------------5-5
      • FW_2BL-----BF07-Pwr7-----------------81b------------5-5
      • FW_6TU-----BF07-Pwr3--------------direct------------5-7
    • The chambers connected to Crate 4, channel #9_A have been temporarily moved to Crate 5, channel #2_A in order to check if the frequent trips which affect Crate 4, channels #9_A and #9_B are due to some problems on PS4.
    Gas:
  • The gas outputs from 2 chambers(FEM-5 and FEM-7) have been connected to gaslines which go to the EH for Fluorine tests. The EPICs displays for these channels will be zero.
  • The gas inputs for the 3 avalanche RPCs are provided by a distribution box on the lower east door.FEM 1,3,5 are connected to channels 9,10,11. The avalanche RPC outputs are in the nominal locations(except for the above note).
  • Known Problems:
    • The following forward endcap RPCs are known not to bubble.
      • FWT-12,13,14,FWM5,7,9,14,FWB16
      • FEM 4,5,6,7,15,FET14,16
      • FEbelt_1LLB,FEbelt_2LUB


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