\addvspace {10\p@ } \contentsline {figure}{\numberline {4.1}{\ignorespaces Generic diagrams for hard photon production.}}{3} \contentsline {figure}{\numberline {4.2}{\ignorespaces Photon energy spectrum from the Compton back-scatter source}}{5} \contentsline {figure}{\numberline {4.3}{\ignorespaces Photon power spectrum from an oriented diamond radiator.}}{8} \contentsline {figure}{\numberline {4.4}{\ignorespaces Schematic plan view of the photon beam line}}{9} \contentsline {figure}{\numberline {4.5}{\ignorespaces Coherent bremsstrahlung spectrum}}{12} \contentsline {figure}{\numberline {4.6}{\ignorespaces Coherent bremsstrahlung spectrum after collimation.}}{14} \contentsline {figure}{\numberline {4.7}{\ignorespaces Linear polarization in the coherent bremsstrahlung peak}}{16} \contentsline {figure}{\numberline {4.8}{\ignorespaces Linear polarization of the coherent bremsstrahlung beam}}{17} \contentsline {figure}{\numberline {4.9}{\ignorespaces Maximum polarization {\em vs} radiator-collimator distance.}}{18} \contentsline {figure}{\numberline {4.10}{\ignorespaces SRS setup}}{23} \contentsline {figure}{\numberline {4.11}{\ignorespaces Rocking curve 1}}{25} \contentsline {figure}{\numberline {4.12}{\ignorespaces Rocking curve 2}}{26} \contentsline {figure}{\numberline {4.13}{\ignorespaces Collimated coherent bremsstrahlung spectrum }}{28} \contentsline {figure}{\numberline {4.14}{\ignorespaces Schematic illustration of crystal mounted in goniometer}}{29} \contentsline {figure}{\numberline {4.15}{\ignorespaces Temperature profile of crystal at full current}}{32} \contentsline {figure}{\numberline {4.16}{\ignorespaces Coherent photon spectrum}}{37} \contentsline {figure}{\numberline {4.17}{\ignorespaces Horizontal and vertical beta functions for electron beam}}{39} \contentsline {figure}{\numberline {4.18}{\ignorespaces Horizontal and vertical envelopes for the electron beam}}{40} \contentsline {figure}{\numberline {4.19}{\ignorespaces Plan view of tagging spectrometer}}{44} \contentsline {figure}{\numberline {4.20}{\ignorespaces Two magnet tagger optics }}{45} \contentsline {figure}{\numberline {4.21}{\ignorespaces comparison of beta}}{46} \contentsline {figure}{\numberline {4.22}{\ignorespaces Fixed array of tagging counters}}{50} \contentsline {figure}{\numberline {4.23}{\ignorespaces Conceptual design of tagging microscope}}{51} \contentsline {figure}{\numberline {4.24}{\ignorespaces Angular distribution for pair production by polarized photons}}{55}