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%\title[GEANT4/EGS5]{GEANT4/EGS5}

\title{Trigger update}

\author{Sho Uemura}
%\institute[SLAC]{SLAC\\}
\date[January 12, 2012]

\begin{document}

%\begin{frame}
%  \titlepage
%\end{frame}

\begin{frame}{Trigger simulation progress}
	\begin{itemize}
		\item Large data sets done (/hps\_data/meeg/lcio/v3pt1/); background rates check out
		\item A' efficiency with time evolution done
		\item Background trigger rates and A' efficiency are not significantly affected by: 
			\begin{itemize}
				\item FADC sum resolution (use 80 MeV, for a full range of 2.6 GeV)
				\item Clusterer thresholds (use 100 MeV for seed and add thresholds)
				\item FADC threshold (use 5 MeV for now, still need to nail down)
			\end{itemize}
		\item Overlaying A' with beam background adds some A' triggers (triggers on 1 background cluster+1 A' cluster) and removes others (time walk/crystal dead time)
	\end{itemize}
\end{frame}

\begin{frame}{Trigger rates and efficiencies}
	\begin{center}
		\begin{tabular}{|l|r|r|r|}
			\hline
			Sample & Bunch count & Trigger count & Rate (kHz)\\
			\hline
			%BH	& $5\times 10^7$	& 4	& 4	\\
			Geant4+tridents	& $5\times 10^7$	& 3404	& 34	\\
			EGS5+tridents	& $5\times 10^6$	& 138	& 14	\\
			\hline
		\end{tabular}
	\end{center}
	\begin{itemize}
		\item $10^4$ A' events at each value of A' mass, spaced by 1000 ns (500 bunches)
	\end{itemize}
	\begin{center}
		\begin{tabular}{|l|r|r|}
			\hline
			A' mass & Trigger count & Acceptance\\
			\hline
			50 MeV	& 1023	& 10.2\%	\\
			75 MeV	& 1881	& 18.8\%	\\
			100 MeV	& 1817	& 18.2\%	\\
			150 MeV	& 740	& 7.4\%	\\
			200 MeV	& 308	& 3.1\%	\\
			250 MeV	& 220	& 2.2\%	\\
			\hline
		\end{tabular}
	\end{center}
\end{frame}

\begin{frame}{Trigger monitoring}
	\begin{itemize}
		\item Per-crystal scalers:
			\begin{itemize}
				\item Hits seen by trigger system
				\item Cluster seed count
				\item Cluster add count
				\item Trigger count
			\end{itemize}
		\item Trigger scalers: count of cluster pairs passing each trigger cut
	\end{itemize}
\end{frame}

\end{document}

