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Introduction

Note that public detector geometry data can be found here.

Nearly all imaging experiments conducted at LCLS require a precise description of the experimental geometry, especially how one or more area detectors are arranged with respect to the x-ray beam and interaction site.  In pixel array detectors photon energy is usually deposited in a single pixel and hence a description of the experimental geometry should aim to provide the pixel location to a precision comparable with or better than its size, for the CSPAD about 100μm. 

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