Cathode High Voltage - Troubleshooting » History » Version 5

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Sarah Lockwitz, 12/01/2015 03:00 PM

Cathode High Voltage - Troubleshooting

What to do if....

  • The voltage on the pick-off point changes
    If the value changes to a new value like this:

Don't worry. This happens regularly:

  • The HV supply trips
    First, call the run coordinator.
    If it is not between the hours of 10 pm - 7 am, call the HV expert. Otherwise, call them in the morning. The detector will need a full system checkout -- we will not be ramping the voltage in the middle of the night.
  • HV Major Alarms
    Call the HV expert. They will monitor the situation.

Crash button

If the HV must be ramped down, it is best for an expert to use the expert GUI.

In the rare case where all else has failed and the HV must go down, the power button on the Glassman supply can function as a crash button. This is not the default method to ramp down. It will create a sudden drop in voltage in the entire system stressing components. The power button is highlighted below.