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Jungfrau4M Tripper

Tyler NT Pennebaker 

Thanks in large part to Daniel Scott Damiani, a tripper has been created for the Jungfrau 4M detector in CXI. This is similar to the CSPAD tripper and will help to protect the detector from intense X-ray by blocking the beam when too many hot pixels are detected. The tripper runs through a combination of an IOC and AMI plugin. The IOC host PVs that for input and output to the tripper and closes the shutter when necessary. The window below can be easily seen on the CXI Home Screen, and can be used to adjust the threshold or clear a trip. From now on, the tripper should always be enabled to prevent burning out any more pixels.

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The "ADU Threshold" is the number of ADU below the saturation in low gain allowed before a pixel is considered too high. The "Pixel Count" is the number of high pixels allowed before tripping the beam. Please do not adjust these values without discussing with Meng or I beforehand.

As another form of feedback, the AMI plugin adds an option in the AMI window called "JungfrauTrip" that allows the user to watch the number of pixels above the threshold over time. Below, we can see a constant 20 pixels above the threshold, using the current settings without beam, due to the misbehaving already-burnt pixels. If you have any questions about the tripper, please feel free to reach out to me!

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Timing moves to RHEL7

Christina Pino 

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