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Mark S. Brown edited 30mmMeasurements.tex
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\subsection{30mm Measurements}
\label{sec:30mm}
\subsubsection{CTR Results}
Two identical polished Proteus LYSO:Ce
$2\times2\times30$mm$^3$ $2\times2\times30$ mm$^3$ scintillator crystals, which we will refer to as 30A and 30B, are measured at DOI values between 0 and
30mm 30 mm in
2.5mm 2.5 mm increments alternating between the two scintillator crystals. This is to determine the contribution, if any, of systematic errors introduced by differences in coupling, alignment and surface finish. Each measurement is repeated with and without PTFE tape. The PTFE tape covers all faces
bar except that in contact with the
photodetector with several photodetector. Several tightly-bound layers
of PTFE are used to increase
adhesion. adhesion with the scintillator crystal. Measurements with complete wrapping will referred to as the wrapped configuration. Likewise no wrapping is referred to as the unwrapped configuration. Each measurement was taken for 54 minutes each. As in the standard coincidence measurements, the first 5 minutes prior to data collection are ignored to ensure temperature stability within the sealed apparatus box.