EIO in the target cave: related documents 


Microwave motor control system 

Motor controller ORC: Microwave motor Control Box.pdf


Operating the microwave system Polarization  

Turning on the system 

  • Turn on the microwave chiller near the NM3 area
  • Turn on the microwave interlock box in the slow controls rack. After about one minute, the value displayed on the “Gem sensor “of the interlock box should be greater than 0.10r.
    • If not, do not proceed and contact the target expert.
















  • Turn on the “Varian” power supply in the slow controls rack.
    • Initially, the power supply will on the “Filament delay” state for about 2 minutes
    • After two minutes the power supply will be changed the state to “Standby”. Now the power supply is ready.
    • If the power supply goes to the “Summary fault” state, contact the target expert
  • Change the power supply mode from Local to Remort by pressing the button as in the picture below

 

  • Turn on the EIP frequency counter in the slow controls rack and press 7 3 7 numeric buttons. This will select the correct frequency band
  • Turn the power supply controller in the control room rack and set the mode to Local. Make sure the power supply is in the Standby mode

  • Now the power supply is ready to transmit the microwave to the target cups.

       

Restoring the microwave system from fault conditions 

Whenever there is a loss of microwave frequency, you will hear a continuous warning sound from the microwave computer.

As in the image below, you will see a blinking "μ-wave temperature issue" warning on the microwave VI. This happens when the "wave guide temp" drops below the threshold level.

    • Steps to follow

    1.  Check the front panel of the microwave power supply controller in the control room rack. If it is in fault mode, you will see red warning lights on the front panel.
      1. If it is not in fault mode, proceed directly to step d.
    2. Press the, transmit/standby button two times around one-second intervals. It will clear the warning and start the microwave transmission.
      1. If the warning comes back right at the same time, do not proceed; call the target expert.
    3. In a few seconds, you will see the red line (waveguide temp) in the EIO temperature plot rising. At the same time, the EIP frequency may appear (This is not essential). It will take less than 15 seconds to clear the warning sound and the alerts on the VI. Now the system is back again. No need to perform further steps.




      1. If the temperature does not come back, follow the step d.
    4. Change the Set position (rev) value to 1.75 and press enter 


    5. Monitor the waveguide temperature on the EIO temperature plot. If there is a temperature increase OR if you observe numbers on the EIP Frequency (GHz), press STOP MOTOR



      1. If this action is unsuccessful, change the Set position (rev) value to 2 and repeat step e.

      2. If the issue persists, press the transmit/standby button once on the power supply to switch the mode to standby. Then, call the target expert.

                                                                                                                                                                                                                                                                                               





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