Stopping the AGIPD Detector at MID

This is a guideline on how to stop and power down the AGIPD detector at MID.

Data taking should be stopped for doing this procedure.

Switching off sequence

Depending on what are the next plans with the detector, not all these steps are necessary. Please check with the run coordinator from MID (for example whether warming up of the detector is necessary).

Powering down the detector

The detector can be powered down with the automatic procedure or manually.

Powering down the detector with the automatic procedure

  • One Step procedure:

    • Go to the AGIPD power Control part of the agipd_overview scene and press Detector Shutdown
    • When the procedure is finished, the indicator for`All off` should be green and all channels in the browser feedback (Fig. 9) either ‘Off’ or ‘Interlocked’

  • Procedure in three steps:

    • Go to the AGIPD Power part of the scnene agipd_overview and press the button ‘HV Off’. When the procedure is finished the indicator for HV on should be blue and all HV channels in the browser feedback should be off.
    • Press ASICS off, the Asics on indicator should turn blue, and the channels U100 - U407 off
    • press Elecronics Off, when this procedure is finished,`Electronics on` should be blue, All off should be green and all channels should be off or interlocked

Note

Emergency off: in case the power procedure results in an error state and the normal control buttons are not available the Emergency off button can be pressed, which will prompt all power channels (low and high voltage) to power down. In case this includes the HV channels this will still take ~ 5 minutes to ramp down. When all channels in the browser feedback ar off or interlocked the device can be resetted. Another Check of the power status should result in the indicator for “All off” to be green.

Powering down the detector manually

In case the automatic procedures do not work the detector can always be switched off manually: There is a guideline in the lower right part of the manual power scene regarding how to power down the detector. This scene is also used for the powering down.

  1. Using the manual power scene switch off the high voltage:

    Tag filter = bias    Switch channels = press Off
wait for ramping

  2. Using the manual power scene switch off ASIC power:

    Tag filter = asic   Switch channels = press Off

  3. Using the manual power scene switch off FPGA:

    Tag filter = fpga   Switch channels = press Off

  4. Using the manual power scene switch off the remaining powers:

    Tag filter = adc|aux|mfpga|mc|efan   Switch channels = press Off

A mix of both methods is also possible, e.g. switching off the HV and asics manually (step 1. and 2. from the manual procedure) and using the automatic procedure to switch off the Electronics.

Switching off Huber Unichiller

The Huber chiller can be switched off by pressing the ‘off’ button on the ‘external housing cooling control’ subscene of the Agipd overview scene

Note

Usually it is not necessary to switch off the Unichiller at the end of the shift, unless this is necessary for maintenance.

Warm up detector

This only needs to be done when the detector will not be operated for a long time and/or if maintenance needs to be done which requires access to the detector. Please check with thr run coordinator if warming up the detector is necessary.

To warm the detector
  • make sure the detector is powered down.
  • go to the subscene AGIPD Cooling Control.
  • press heat in the subscene, the Final Setpoint should change to +20 degC and the Current temp. should slowly increase by approximately 1 degC per minute.
  • when the procedure is finished the system state is warm.