CPP-NPP Experimental Controls

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CPP requirements

Power HV/LV

  • HV for muon chambers: 6 HV channels for the 6 wire chambers (+1765V nominal)
  • LV for muon chanbers: 6 times +5V and 6 times -5V (nominal current ?1mA?)
  • HV for 4 scintillator paddles: 8 HV channels for PMTs (-1800V nomial)
    • HV main frame location (existing?)?
    • LV main frame location (existing?)?

Chamber Gas

  • Ar/CO2 (90%/10%) premixed in bottles
  • gas line from gas shed to downstream platform
  • gas manifold on downstream platform
  • gas flow control though manual rota-meter (flow meter): nominal flow 300 sccm
  • gas flow exhaust protected with oil bubblers

Chamber cooling

  • under discussion, potentially with dry nitrogen
  • no sensory foreseen, neither for flow nor for temperature.

DAQ readout

  • CDC VXS crate \#1 is used with all fADC125s, moved to downstream platform
    • needs new ROC (never used before in Gluex == new/unknown to GlueX mac/ip address)
    • needs 2 Ethernet connections one for the fan-tray (slow control network) one for the ROC (DAQ network)
    • needs 1 fiber optics connection to TI
  • One fADC250 for scintillator digitization. Added to TOF crate?

Software

  • GUI for HV/LV control, values to EPICS data base
  • low level monitoring histograms, scaler display