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\citation{PR05-007}
\citation{PR08-011}
\citation{Subedi:spin2008}
\citation{PR05-007}
\citation{PR08-011}
\citation{Alcorn:2004sb}
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\@writefile{toc}{\contentsline {subsection}{\numberline {}Introduction}{1}{}}
\@writefile{toc}{\contentsline {subsection}{\numberline {}Detector and Data Acquisition System}{2}{}}
\@writefile{lof}{\contentsline {figure}{\numberline {1}{\ignorespaces Grouping scheme (side-view) for the double-layered lead glass counters for the new DAQ. The colored vertical bars represent the range of each group. }}{2}{}}
\newlabel{fig:grouping}{{1}{2}{}{}{}}
\@writefile{lof}{\contentsline {figure}{\numberline {2}{\ignorespaces Electronics diagram for the Right HRS DAQ used by the PVDIS experiment. The Sum8's, discriminators and logic modules for two groups are shown, as well as the location of the tagger signal, setup of the VETO circuit using the scintillator and the gas cherenkov signals, the logic units for combining triggers from all eight groups into final triggers, and the scalers. Electronics for the Left HRS are similar except the units related to grouping. }}{3}{}}
\newlabel{daqflowchart}{{2}{3}{}{}{}}
\@writefile{toc}{\contentsline {subsection}{\numberline {}PID performance}{3}{}}
\@writefile{lof}{\contentsline {figure}{\numberline {3}{\ignorespaces Preshower vs. Shower ADC spectrum (sum of 8 blocks) for group 2 on the Left HRS, without fbTDC cut (left) and with cut on the electron wide trigger fbTDC signal. It clearly shows the hardware cuts on the shower and the total shower signals, indicating the DAQ is selecting the correct events as electrons. The cuts can be adjusted by changing the discriminator thresholds. The events near (200,1000) are electrons that deposited energy in overlapping blocks and are recorded in adjacent groups. }}{4}{}}
\newlabel{fig:showerspectrum}{{3}{4}{}{}{}}
\@writefile{lof}{\contentsline {figure}{\numberline {4}{\ignorespaces Electron detection efficiency (top) and pion rejection factor (bottom) vs. vertical (dispersive) hit position of the particle in the preshower detector for the narrow electron triggers in the Left HRS. For electron efficiencies, the total efficiency is shown by the red curve, while blue shaded area indicates events that are recorded by the two adjacent groups. The average electron efficiency across the detector for the run (about 60 minutes long) used in this figure is $(94.626\pm 0.002)\%$ and the averge pion rejection factor is $75.3\pm 1.1$. The error bars are statistical only. PID performance for the wide path and the Right HRS are similar. }}{4}{}}
\newlabel{fig:pidLeft}{{4}{4}{}{}{}}
\@writefile{toc}{\contentsline {subsection}{\numberline {}Deadtime Study}{4}{}}
\@writefile{lof}{\contentsline {figure}{\numberline {5}{\ignorespaces Schematic diagram for the tagger setup and it's timing sequence. A typical fbTDC spectrum for the relative timing between the output coincidence signal and the input tagger is shown in the bottom. Two different scenarios are shown: 1) when there is no PMT signal preceding the tagger, the tagger triggers the DAQ and forms a coincidence signal with the delayed tagger. This forms the main peak $I_0$ in the fbTDC spectrum; 2) when there is a PMT signal preceding the tagger by a time interval shorter than the delayed tagger width, the PMT signal triggers the DAQ and forms a coincidence signal with the delayed tagger. This forms the pileup area $I_1$ and $I_2$. }}{5}{}}
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\@writefile{lof}{\contentsline {figure}{\numberline {6}{\ignorespaces }}{5}{}}
\newlabel{fig:dtplot}{{6}{5}{}{}{}}
\@writefile{toc}{\contentsline {subsection}{\numberline {}Pileup in DAQ}{5}{}}
\@writefile{toc}{\contentsline {subsection}{\numberline {}Trigger Simulation}{5}{}}
\bibdata{pvdis_nim_v2}
\bibcite{PR05-007}{{1}{2005}{{Michaels et~al.}}{{Michaels, Reimer, Zheng et~al.}}}
\bibcite{PR08-011}{{2}{2008}{{Michaels et~al.}}{{Michaels, Reimer, Zheng et~al.}}}
\bibcite{Subedi:spin2008}{{3}{2009}{{Subedi}}{{}}}
\bibcite{Alcorn:2004sb}{{4}{2004}{{Alcorn et~al.}}{{}}}
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\@writefile{toc}{\contentsline {subsection}{\numberline {}Asymmetries}{6}{}}
\@writefile{toc}{\contentsline {subsection}{\numberline {}Conclusion}{6}{}}
\@writefile{toc}{\contentsline {section}{\numberline {}References}{6}{}}
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