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AlCapPSI/BeamRequirements.tex

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+\subsubsection*{ Experimental area}
+$\pi$E1 beam line
+
+\subsubsection*{Required beam properties}
+\begin{itemize}
+	\item Particle: $\mu^-$
+	\item Momentum: 30--35 MeV/c
+	\item Momentum bin: $<2$ \% FWHM
+	\item Beam spot: $<2$ cm in diameter
+	\item Intensity: $2 \times 10^{4}$ s$^{-1}$
+	\item Beam purity: $<10$ \% electrons
+\end{itemize}
+
+\subsubsection*{ Duration of the experiment}
+
+{\bf We request two 4 week PSI beam blocks, one scheduled in 2013 and the
+next one in 2014.} 
+
+The first experiment would be used to commission the full set-up and shake down its
+components for the three work-packages (WPs) planned. The priority would be to perform most of the proton
+measurements (WP1), while simultaneously measuring the X-rays for
+WP2. A first exploratory neutron measurement 
+to start WP3 is also anticipated. This part of the experiment is ready
+in spring 2013, and we would prefer an 
+early running time during the 2013 schedule. After that,
+the data would be analyzed and results reported at the BVR 2014. Depending on the outcome, 
+in 2014 additional proton statistics data taking and systematic studies are foreseen to achieve publication quality
+data. But the main focus in 2014 will be on final neutron
+measurements and operating the large NaI for the WP2 program.
+
+The requested 2013 beam time will be structured in the following way: 
+\begin{itemize}
+	\item Week 1:  Set-up. Commission beam counters, proton, X-ray and
+          neutron detectors. Vacuum in target chamber.
+
+	\item Week 2:  Beam-optimization. Thick, then thin Si detectors
+          as active targets are used to study beam properties and optimize the
+          stopping fraction, to quantify background and select the
+          optimal geometry of the detector packages, relative to
+          target and beam. The X-ray detector will assist in the tuning process. First high statistics data set is taken
+          with thin Si in the target position, to calibrate the target
+          response function and normalize the X-ray detectors. 
+
+	\item Week 3: High statistics measurements with 3 targets of
+          Al and Ti, 25-200 $\mu$m thickness.
+ 
+        \item Week 4: Continued Al, Ti measurements. Last days
+          dedicated neutron measurement, thick target, with proton vacuum chamber removed.  
+\end{itemize}