General Considerations

• Gas Shed
  
  • ethane regulator "chugs"
  • update the schematic for the gas systems
  • dry air for the hall - replace system with compressor?
    
  • connect argon/ethane manifold pressure sensor to ADC
  • re-do Gas Interlock System Master Chassis with latching signals
  • Tech Note for gas flush - make 2 setups
  • fabricate a quad gas mixer
  • Swap out MFCs in VDC mixing system
  • Replace pressure sensors on the Hall A Ethane manifold
    
• General Stuff
  
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  • full list of devices on 188 subnet
  • review EPICS Archiver checklists
  • SBS GEM's gas mix controller
    
  • communicating with UPSs
  • TOF for gas mix monitoring
  • Schematic for portable gas mixer - for Whit
  • Modify 4-20mA displays to remove 555 timers
  • RMS to DC converters to monitor donut transformers
  • need a memory test for RPi with background effects
    
  • 555 for radiation damage and CTR circuit
• Must be done - No deadlines involved
  
  • single HV card in a box
  • Compton dipole extenders
  • VDC wire tension measuring circuit - determine operating parameters - correct the layout of the wire tension bridge circuit
  • add gas bottle changing procedure to HAWGS
  • add flow controller swap procedure to HAWGS
• Both Arms
  
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  • On Detector Stacks
    
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  • Bogies
    
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  • D1
    
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  • Q2 and Q3
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• Right Arm
  
  • General things to do
    
    • remove shielding on power supply platform
    • remove electronics from power supply platform
    • remove elctronics from under boxbeam
      
  • Bogies
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  • On Detector Stack
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  • Right Q3
    • stripped nut on blue busbar inside-front
    • black handled switch has problems "catching" when lowered - it often takes a little playing around to get the lever to "catch" when raised back up
  • Right Dipole
    
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    • when the supply is off the output current is not reading zero - some small power supplies still getting 120VAC
      
    • Firing problem on SCRs - maybe the firing circuit?
      
    • voltage out of the supply is almost twice that of the LD1 for the same current
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  • Right Q2
    
    • 18 bit DAC power supply out of tolerance
      
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  • Right Q1
    
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• Left Arm
  
  • General things to do
    
    • remove shielding from power supply platform - leave shielding on beamline side
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  • On Detector Stack
    
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    • carbon doors not fully open
      
  • Left Q3
    
    • is Zero Current LED operating correctly?
    • oscillations on current readback 6/29 thru 7/1
    • change in ramp up rate - see 06-27
    • waver in 480VAC donuts (also in LD1)
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  • Left Dipole
    
    • Fix LCW leak in LD1 Dynapower
      
    • waver in 480VAC donuts (also in LQ3)
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  • Left Q2
    • Test LQ2 FuG with new polarity reversal switch
      
    • odd, small pulsing in output current - find the source
      
    • noise on the current readback - seems real - can see it in the hall probe - not in transistor bank voltages
    • pulse sense leads to find where break is in wire
  • Left Q1
    
    • Replace ground fault module in LQ1 power supply
      
    • power supply does not trip off on loss of communications - how should we implement this?
    • when the magnet is cycled to 900 amps the UPS under the Right Boxbeam sends an "on battery" email and "on utility" when brought down
      
    • install strainer on LCW input line
• Super Big Bite
  • General
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  • Gas system
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  • Power supply
    • Ground fault detector ties one side of supply to ground - Do we want this?
    • LCW flow meter is bad - bogus readings
      
    • install AC power
  • Beamline corrector coils
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• Big Bite
  • General
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  • Power Supply (BigBox)
    • add donut transformers to 480VAC inputs
      
    • no indication when e-stop button pushed on the front of the supply
• Compton Polarimeter
  
  • In the Hall
    
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  • ARC Laser Lab
    
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• 9th Dipole Shed
  
  • install MAGNET ON signs
    
  • scan in papers and manuals
• Moller Polarimeter
  
  • Superconducting Target Magnet
    
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  • Controls
    
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