\addvspace {10\p@ } \contentsline {figure}{\numberline {5.1}{\ignorespaces Diagram of the readout scheme of the tagger microscope. The SiPMs are connected to the scintillating fibers through clear fibers so that they can be mounted out of the radiation zone near the mid-plane of the spectrometer. }}{3} \contentsline {figure}{\numberline {5.2}{\ignorespaces The distribution in vertical coordinate of the post-bremsstrahlung electrons at the tagger focal plane in the region of the coherent peak, for all tags (upper curve) and those that pass the photon collimator (lower curve). When all fibers except the central row in the microscope are inhibited, only electrons with $|y|<1$\nobreakspace {}mm contribute to the tagging rate. }}{5}