Hutch:MFX

Beam energy: 8.8keV


Shift summay:

MFX X-10059 Hansson – shift 1 and 2 (4/15,4/16)
Beamtime was targeted at testing the ePixM prototype detector for the first time at a beamline. Detector ran well in the DAQ due to the efforts of the DAQ group - thanks a lot guys! The detector was successfully timed in and we saw beam for the first time. A number of ASIC register settings and thresholds were tuned, and we successfully measured the detector transfer function for both the Autoranging and softHigh gain modes. Linearity and single photon data were collected for frame rates ranging from 120 Hz to 4680 Hz, and data to evaluate the effect or full area exposure and temperature variation was also collected. All in all a very productive first beamtime for the ePixM prototype detector!


Data analysis:

ePixM Linearity&Crosstalk_Bhavna



Dionisio's Link: https://confluence.slac.stanford.edu/x/tQNjGg

  • ASIC documentation

ePixM & ePixHRM

  • Analyses documentation

https://github.com/slaclab/beamtime-calibration-suite

  • Test setup

  • Timing in the detector

Scope and weighing funcion

start_ns set to 37500



  • Intensity scan

  • Single photon analyses

  • Full frame image

The image shows that the air-scatter intensity goes down really fast. So choosing the pixels in the high flux region is necessary (Note that the functional asics are the ones on the right. Compared to what is shown in the AMI, the top right asic in this plot has been flipped left-right as we assume this might be the physical layout - to be confirmed)

Initially the threshold was only allowing for the edges of the detector to switch into low gain after trimming the detector threshold most of the array now switches nd we can see a proper image in the detector. Below is an image of a key in from of the detector. That enables us to know the detector orientation with respect to the image. The beam is position above the detector, where the orange tape is  located.


Next steps (4.16 beam shift)

  • recording intensity scans with different thresholds. That enables
  • Pin hole

Added lead tape in front of the detector and repeating threshold scan and exercising the intensity scan for each threshold step


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