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XTCAV is a detector that is used to determine the laser-power vs. time of each LCLS shot. Alvaro Sanchez-Gonzalez has written psana-python code to do the rather complex analysis of images from the XTCAV camera to determine these quantities. Some detailed documentation from Tim Maxwell on this device is Here.
Analysis Setup
Two things must be done before XTCAV analysis will function: a "dark run" must be analyzed to get the pedestal values for cameras, and a "no lasing" run must be analyzed to generate sets of "no lasing" images (the latter is quite a complex process). An example of a dark-run analysis is:
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Overview
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