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- %\beamersetuncovermixins{\opaqueness<1>{25}}{\opaqueness<2->{15}}
- \title{Silicon Vertex Tracker for SuperB}
- \author{Marcin Chrzaszcz}
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- \date{\today}
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- \begin{document}
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- {
- \institute{Institute of Nuclear Physics PAN}
- \setbeamertemplate{footline}{}
- \begin{frame}
- \titlepage
- \end{frame}
- }
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- \institute{IFJ PAN}
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- %tutaj mamy pierwsza strone
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- \section[Outline]{}
- \begin{frame}
- \tableofcontents
- \end{frame}
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- %normal slides
- \section{General Overview of Silicon Vertex Tracker (SVT)}
- \subsection{SVT Layers 1-5}
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- \begin{frame}\frametitle{SVT Layers 1-5}
- \begin{center}
- \includegraphics[scale=0.15]{svt2.png}
- \begin{columns}[c]
- \column{3in}
-
- \begin{itemize}
- \item Five layers(1-5) of double sided silicon strip detectors.
- \item Radius span $3-15~{\rm cm}$.
- \end{itemize}
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-
- %first column
- \column{2in}
- \newline \includegraphics[scale=0.23]{svtb.png}
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- %second column
- \end{columns}
- \end{center}
- MC studies showed that this solution meets with higher background conditions expected in SuperB.
- \end{frame}
- \subsection{Physics requirements}
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- \begin{frame}\frametitle{Physics requirements}
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- \begin{enumerate}
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- \item SVT together with drift chamber (DCH) and magnet provide track and vertex reconsturction
- \item For low energetic particles SVT must provide the complete track information.
- \item SVT must provide the same precision of time dependend CP violation as Babar detector with boost reduced from $\alpha\beta=0.55$ to $\alpha\beta=0.28$
- {
- \begin{itemize}
- \item $50-80 \mu m$ for exclusively reconstructed modes.
- \item $100-150 \mu m$ for inclusively reconstructed modes.
- \end{itemize}
- }
- \end{enumerate}
-
-
- \end{frame}
- \subsection{Layer0}
- \begin{frame}\frametitle{Layer0}
- \begin{columns}[c]
- \column{3in}
-
- To meet the requirements mentioned an additional 6th layer was introduced (Layer 0).
- Aspects that are beeing taken in projecting Layer0:
- \begin{enumerate}
- \item Background:
- {
- \begin{itemize}
- \item $e^{+} e^{-} -> e^{+} e^{+} e^{-} e^{-}$.
- \item Bhabha scattering.
- \item Touschek.
- \item two-photon events.
- \end{itemize}
- }
- \item Sensor occupancy.
- \item Radiation hardness.
- \end{enumerate}
-
- \column{2in}
- \includegraphics[scale=0.15]{s_vs_l0.png}
- \newline \includegraphics[scale=0.20]{dt_vs_l0.png}
-
- \end{columns}
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-
- \end{frame}
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- \section{Options for layer0}
- \subsection{List of options}
- \begin{frame}\frametitle{List of optons}
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- \begin{enumerate}
- \item Double-sided silicon strip detector (Striplets).
- \item Pixel detectors:
- {
- \begin{itemize}
- \item Hybrid pixels.
- \item MAPS.
-
- \end{itemize}
-
- }
-
- \end{enumerate}
- \end{frame}
- \subsection{Striplets}
- \begin{frame}\frametitle{Striplets}
- \begin{columns}[c]
- \column{3in}
- \begin{itemize}
- \item $200 \mu m$ thick, with $50 \mu m$ readout pitch.
- \item Rotated by$\pm 45^{0}$.
- \item Occupancy: $0.8\%$; $4\%$ with safety factor.
- \item Chip with 128 analog channels and 132 $ns$ time window.
- \item Signal to Noise: 26.
- \item Material budget: $0.55 \% X_{0}$
- \item Cluster rate: $6.37 \frac{MHz}{cm^{2}}$
-
-
- \end{itemize}
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-
- %first column
- \column{2in}
- \newline \includegraphics[scale=0.22]{striplets.png}
- \newline \includegraphics[scale=0.2]{pt.png}
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- \end{columns}
- \end{frame}
- \begin{frame}\frametitle{Test Beam}
- \includegraphics[scale=0.22]{testbeam.png}
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-
- \end{frame}
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- \begin{frame}\frametitle{Test Beam}
- \begin{small} Work done by: Laura Fabbri (INFN Bologna) \end{small}
- \begin{columns}[c]
- \column{2.7in}
- \begin{enumerate}
- \begin{tiny}
- \item Test done on DUT rotated by: $ 0^{o}, 15^{o}, 30^{o}, 45^{o}, 60^{o}, 70^{o}$.
- \item 1 week of data taking. (Alberto please confirm this)
- \item Thresholds = 20 or 15.
-
- \end{tiny}
- %\line(1,0){300}
- \end{enumerate}
- {
- \includegraphics[scale=0.16]{striplets2.png}
- }
- \begin{small}
- Procedure:
- \begin{itemize}
- \item Alignment done by minimizing residuals, on telescope and DUT.
- \item Cut on the residual: $ 56\mu m$ and fiducial cut.
-
- \end{itemize}
-
- \end{small}
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-
-
-
- \column{2.3in}
- \includegraphics[scale=0.18]{residsx.png}
- \newline \includegraphics[scale=0.18]{residsy.png}
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- \end{columns}
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- \end{frame}
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- \begin{frame}
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- \begin{columns}[c]
- \column{2.5in}
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- \includegraphics[scale=0.17]{strip.png}
- \column{2.5in}
- \begin{itemize}
- \item Inactive strips not taken into account in the analysis
-
- \end{itemize}
-
- \end{columns}
- \begin{center}
- \includegraphics[scale=0.17]{channel.png}
- \end{center}
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-
- \end{frame}
- \begin{frame}
- \begin{center}
- \includegraphics[scale=0.23]{eff.png}
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- \end{center}
- $\varepsilon_{u}=\frac{n_{clusters}|spUPos-intUPos|<56 \mu m}{n_{int} \subset active U region } $
- \newline
- \newline $\varepsilon= \frac{n_{clusters}|spUPos-intUPos|<56 \mu m \wedge n_{clusters}|spvPos-intVPos|<56 \mu m}{n_{int} \subset active U and V region } $
- \begin{columns}[c]
- \column{2.5in}
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-
- \column{2.5in}
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-
-
- \end{columns}
- \end{frame}
-
- %NOW pixels
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- \subsection{Hybrid Pixels}
- \begin{frame}\frametitle{Hybrid Pixels}
- \begin{columns}[c]
- \column{2.5in}
- \begin{itemize}
- \item Pixels: 50 x 50 $\mu m^{2}$ pitch.
- \item $200 \mu m$ thick.
- \item Fron end chip optimised to work with $100\frac{MHz}{cm^{2}}$.
- \item Organised in Mega Pixels(16 Pixels).
- \item Data-push readout featuring on-pixel data sparsification and time-stamp.
- \item Gain = $42\dfrac{mV}{fC}$.
-
- \end{itemize}
- \column{2.5in}
- \includegraphics[scale=0.23]{pix.png}
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-
-
- \end{columns}
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- \end{frame}
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- \begin{frame}\frametitle{Hybrid Pixels Test Beam Notes}
- \begin{block}{Work done by:}
- A.Lusiani, M.Chrzaszcz, Nicola Neri, Benjamin Oberhof, Antonio Paladino.
- \end{block}
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-
- \begin{exampleblock}
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- \begin{itemize}
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- \item Several thresholds, reference threshold 1/4 of a m.i.p. at normal incidence.
- \item Data took with 3 chips: $12, 53, 55$.
- \item DUT rotated around at $ 0^{o}, 15^{o}, 30^{o}, 45^{o}, 60^{o}, 70^{o}$.
- \item 128 pixels along x (horizontal, u-axis), 32 pixels along y (vertical, v -axis).
- \item approximately parallel tracks, high momentum, negligible multiple scattering.
- \end{itemize}
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- \end{exampleblock}
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- \end{frame}
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- \begin{frame}\frametitle{Hybrid Pixels Test Beam Results}
- \begin{center}
- \includegraphics[scale=0.3]{res.png}
- \end{center}
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-
- \end{frame}
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-
- \begin{frame}\frametitle{Hybrid Pixels Test Beam Results}
- \begin{center}
- \includegraphics[scale=0.3]{angle.png}
- \end{center}
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-
- \end{frame}
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-
- \begin{frame}\frametitle{Hybrid Pixels Test Beam Results}
- \begin{columns}[c]
- \column{1.5in}
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- \begin{itemize}
- \item To cross check our results, TOY MC was written.
- \item Good agreement with the data.
-
- \end{itemize}
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- \column{3.5in}
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- \begin{center}
- \includegraphics[scale=0.3]{sim.png}
- \end{center}
-
- \end{columns}
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- \end{frame}
-
- \begin{frame}\frametitle{Hybrid Pixels Test Beam Results}
- \begin{columns}[c]
- \column{1.5in}
-
- \begin{itemize}
- \item To cross check our results, TOY MC was written.
- \item Good agreement with the data.
-
- \end{itemize}
-
- \column{3.5in}
-
- \begin{center}
- \includegraphics[scale=0.3]{effvsangle.png}
- \end{center}
-
- \end{columns}
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- \end{frame}
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-
- \begin{frame}\frametitle{Threshold Simulations}
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- \includegraphics[scale=0.29]{sim2.png}
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- \begin{exampleblock}{Conclusion}
- Next Test Beam will be done with lower threshold.
- \end{exampleblock}
-
-
- \end{frame}
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-
- \subsection{MAPS}
- \begin{frame}\frametitle{Monolithic Active PixelS}
- \begin{columns}[c]
- \column{2.5in}
- \begin{itemize}
- \item Newer, more challenging.
- \item Pixels: 50 x 50 $\mu m^{2}$ pitch.
- \item Implemented in Deep n-well.
- \item Full signal processing chain: large preamplifier, shaper, discriminator, in-pixel logic.
- \end{itemize}
- No TestBeam done. MC and lab results:
-
- \begin{itemize}
-
- \item Efficiency:$98 \% $.
- \item 100$ns$ timestamp.
- \end{itemize}
-
- Much more RD to be done.
-
- \column{2.5in}
- \includegraphics[scale=0.23]{maps.png}
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-
-
- \end{columns}
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- \end{frame}
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- \section{Conclusions}
-
- \begin{frame}\frametitle{Summary}
- \begin{itemize}
- \item SVT for SuperB will be equipped with more layers to overcome lower boost.
- \item Stripplets are the most propable solution for the Layer0.
- \item RD still needed.
- \item In the TDR(Feb 2012) both options will be presented. Final decision will follow after.
-
- \end{itemize}
- \end{frame}
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- \end{document}