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\citation{active_collimator_idea_article}
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\@writefile{lof}{\contentsline {figure}{\numberline {6.1}{\ignorespaces   Results from Monte Carlo studies of the active collimator in the Hall D photon beam line. Panel one shows the current asymmetry (difference over sum) between two opposing inner sectors, as the beam position is shifted along the line between their centers. Panel two shows the systematic shift in the rate of tagged photons within the polarized peak that reach the GlueX target, as a function of the shift of the photon spot from the collimator axis. }}{3}}
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\@writefile{lof}{\contentsline {figure}{\numberline {6.2}{\ignorespaces   Results from a test of the prototype active collimator in the Hall B coherent photon beam during 2007. The two curves are the currents in inner opposing sectors, as the beam is moved across the collimator face along an axis passing through the centers of the two sectors. Only the two inner sectors were connected to amplifiers during this test. }}{5}}
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