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\def\ARROW{{\color{JungleGreen}{$\Rrightarrow$}}\xspace}
\def\ARROWR{{\color{WildStrawberry}{$\Rrightarrow$}}\xspace}

\author{ {Marcin Chrzaszcz} (CERN)}
\institute{UZH}
\title[Special LHC run for Magnet Stations]{Special LHC run for Magnet Stations}


\begin{document}
\tikzstyle{every picture}+=[remember picture]

{
\setbeamertemplate{sidebar right}{\llap{\includegraphics[width=\paperwidth,height=\paperheight]{bubble2}}}
\begin{frame}[c]%{\phantom{title page}}
\begin{center}
\begin{center}
	\begin{columns}
		\begin{column}{0.75\textwidth}
			\flushright \bfseries \Huge {Special LHC run for \\Magnet Stations}
		\end{column}
                \begin{column}{0.02\textwidth}
                  {~}
                  \end{column}
                \begin{column}{0.23\textwidth}
                 % \hspace*{-1.cm}
                  \vspace*{-3mm}
                  \includegraphics[width=0.6\textwidth]{lhcb-logo}
                  \end{column}

	\end{columns}
\end{center}
	\quad
	\vspace{3em}
\begin{columns}
\begin{column}{0.99\textwidth}
\center \vspace{-1.8em} {M. Bettler$^1$, J. Bhom$^2$ , P. Billoir$^3$, M. Chrzaszcz$^4$, C. Da Silva$^5$, M.Durham$^5$,  R.Greim$^6$, W.Karpinskig$^6$, T.Kiring$^6$, M. Martinelli$^4$, M. Pikies$^2$\\~\\
$^1$ Cambridge,  $^2$ IFJ PAN, $^3$ LPNHE, $^4$ CERN, $^5$ LANL, $^6$ Aachen}

\end{column}
%\begin{column}{0.53\textwidth}
%\includegraphics[height=1.3cm]{uzh-transp}
%\end{column}
\end{columns}

\vspace{1em}
%		\footnotesize\textcolor{gray}{With N. Serra, B. Storaci\\Thanks to the theory support from M. Shaposhnikov, D. Gorbunov}\normalsize\\
\vspace{0.5em}

	\textcolor{normal text.fg!50!Comment}{OPG, CERN, September 13, 2018}
\end{center}
\end{frame}
}




\begin{frame}\frametitle{Where our tracks are?}
\begin{columns}
\column{0.1in}
{~}\\
\column{3in}
\ARROW The upstream tracks have rather poor momentum resolution: $\frac{\Delta p}{p} \sim 15\%$. \\
\ARROW The particles die after short and sad (for physics) life in the magnet yoke. \\
\ARROW If one put chambers in the magnet stations, one could record the particles before they death.\\
\ARROW This will not increase the material budget of the rest of the detector.\\
\begin{center}
\includegraphics[width=0.7\textwidth]{images/joke.png}
\end{center}


\column{2in}
\includegraphics[width=0.95\textwidth]{images/sketch.png}\\
\includegraphics[width=0.95\textwidth]{images/magnet.png}



\end{columns}
\end{frame}




\begin{frame}\frametitle{Studies done so far}

\ARROW We have performed studies:
\begin{itemize}
\item Radiation: Dosimeters have been put in the magnet region to measure the radiation dose.
\item For sensitivity studies the MC was used.
\end{itemize}

\ARROW These of course are important studies but having a data driven method is the best.

\begin{columns}

\column{0.5\textwidth}

\ARROW Often our MC prediction are wrong ;)

\column{0.5\textwidth}
\includegraphics[width=0.9\textwidth]{images/ATLAS.png}

\end{columns}


\end{frame}

\begin{frame}\frametitle{The proposal}


\ARROW We would like to propose of obtaining a sample of lower $p_T$ tracks from data.\\
\ARROW There are essentially two possibilities: (many thanks to Niels for discussion and guidance):
\begin{itemize}
\item Make a run with a $50~\%$ of magnetic field.
\begin{itemize}
\item {\color{green}{Direct access to particles that would be swapped by magnet.}}
\item {\color{green}{Not much work on our side}}
\item {\color{red}{Needs additional 10-12h for machine to understand our magnetic field.}}
\end{itemize}
\item Run with nominal magnet and open the OT.
\begin{itemize}
\item {\color{green}{No work for the LHC people.}}
\item {\color{red}{Needs some extrapolation on our side.}}
\item {\color{red}{Needs 1-2h access to open the OT.}}

\end{itemize}

\end{itemize}



\end{frame}



\begin{frame}\frametitle{The golden question}


\begin{alertblock}{}
How much to open the OT, how much coverage/gain you get?
\end{alertblock}

\ARROW This is a hard one ;) and took a bit of time to answer.\\
\ARROW We made two types of simulation:
\begin{enumerate}
\item Open the OT fully.
\item Make a half magnetic field
\end{enumerate}


\end{frame}

\begin{frame}\frametitle{Opened OT}

\begin{columns}

\column{0.5\textwidth}
\ARROW Efficiency gain:\\
\includegraphics[width=0.99\textwidth]{OpenOT_zoom.eps}

\column{0.5\textwidth}
\ARROW Slow pions from $\PDstar$:\\
\includegraphics[angle=-90,width=0.99\textwidth]{out.pdf}


\end{columns}


\end{frame}

\begin{frame}\frametitle{Half magnetic field, closed OT}

\begin{columns}

\column{0.5\textwidth}
\ARROW Efficiency gain:\\
\includegraphics[width=0.99\textwidth]{ClosedOT_halffield.eps}

\column{0.5\textwidth}
\ARROW Slow pions from $\PDstar$:\\
\includegraphics[angle=-90,width=0.99\textwidth]{out.pdf}


\end{columns}


\end{frame}






\begin{frame}\frametitle{Conclusions}

\ARROW The half magnetic field is more expensive but buys us more phase space. \\
\ARROW The open OT is ''cheaper'' but doesn't dig in the most sensitive region.


\end{frame}




\backupbegin

\begin{frame}\frametitle{Backup}
\topline

\end{frame}

\backupend

\end{document}