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Presentations / Magnet_Stations / 13_09_2018_OPG / mchrzasz.tex
@Marcin Chrzaszcz Marcin Chrzaszcz on 13 Sep 2018 11 KB slides for OPG
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\def\ARROW{{\color{JungleGreen}{$\Rrightarrow$}}\xspace}
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\author{ {Marcin Chrzaszcz} (CERN)}
\institute{UZH}
\title[Special LHC run for Magnet Stations]{Special LHC run for Magnet Stations}


\begin{document}
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			\flushright \bfseries \Huge {Special LHC run for \\Magnet Stations}
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                  {~}
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	\quad
	\vspace{3em}
\begin{columns}
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\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}

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\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}
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\begin{frame}\frametitle{Where our tracks are?}
\begin{columns}
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{~}\\
\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}



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\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}

\begin{alertblock}{Our suggestion}
We would propose to go with the second option not to disturb the LHC. \\
For LHCb we would sacrifice one full fill.
\end{alertblock}



\end{frame}



\begin{frame}\frametitle{The proposal -time table}
\begin{center}
\includegraphics[width=0.99\textwidth]{images/OPEN.png}
\end{center}


\ARROW We proposed to have the last Fill of pp collisions with OT opened.\\
\ARROW There is a stop after it so we can close OT without any beam lost.\\
\ARROW We would need only around 2h to open the OT.

\begin{alertblock}{}
Please let us know what you think about this proposal.
\end{alertblock}


\end{frame}












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