\addvspace {10\p@ } \addvspace {10\p@ } \contentsline {figure}{\numberline {2.1}{\ignorespaces Generic diagrams for hard photon production.}}{4} \contentsline {figure}{\numberline {2.2}{\ignorespaces Photon energy spectrum from the Compton back-scatter source}}{5} \contentsline {figure}{\numberline {2.3}{\ignorespaces Photon power spectrum from an oriented diamond radiator.}}{8} \addvspace {10\p@ } \contentsline {figure}{\numberline {3.1}{\ignorespaces Schematic plan view of the photon beam line}}{12} \contentsline {figure}{\numberline {3.2}{\ignorespaces Coherent bremsstrahlung spectrum}}{15} \contentsline {figure}{\numberline {3.3}{\ignorespaces Coherent bremsstrahlung spectrum after collimation.}}{17} \contentsline {figure}{\numberline {3.4}{\ignorespaces Linear polarization in the coherent bremsstrahlung peak}}{19} \contentsline {figure}{\numberline {3.5}{\ignorespaces Linear polarization of the coherent bremsstrahlung beam}}{20} \contentsline {figure}{\numberline {3.6}{\ignorespaces Maximum polarization {\em vs} radiator-collimator distance.}}{22} \contentsline {figure}{\numberline {3.7}{\ignorespaces SRS setup}}{27} \contentsline {figure}{\numberline {3.8}{\ignorespaces Rocking curve 1}}{29} \contentsline {figure}{\numberline {3.9}{\ignorespaces Rocking curve 2}}{30} \contentsline {figure}{\numberline {3.10}{\ignorespaces Collimated coherent bremsstrahlung spectrum }}{32} \contentsline {figure}{\numberline {3.11}{\ignorespaces Schematic illustration of crystal mounted in goniometer}}{34} \contentsline {figure}{\numberline {3.12}{\ignorespaces Temperature profile of crystal at full current}}{37} \addvspace {10\p@ } \contentsline {figure}{\numberline {4.1}{\ignorespaces Coherent photon spectrum}}{43} \contentsline {figure}{\numberline {4.2}{\ignorespaces Horizontal and vertical beta functions for electron beam}}{45} \contentsline {figure}{\numberline {4.3}{\ignorespaces Horizontal and vertical envelopes for the electron beam}}{46} \addvspace {10\p@ } \contentsline {figure}{\numberline {5.1}{\ignorespaces Plan view of tagging spectrometer}}{52} \addvspace {10\p@ } \contentsline {figure}{\numberline {6.1}{\ignorespaces Angular distribution for pair production by polarized photons}}{61} \addvspace {10\p@ }