source: ETALON/papers/2016_IPAC/IPAC16_CLIO/poster/conference_poster_3.tex @ 569

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%       TITLE AND AUTHOR NAME
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{
\vspace{2ex}\\
\sf\bf Study of Short Bunches at the Free Electron Laser CLIO
} % Poster title
{
        \raggedright
        \smaller
         Nicolas Delerue\textsuperscript{1},  St\'ephane Jenzer,  Vitalii Khodnevych\textsuperscript{2}\textsuperscript{3}
\\ LAL, Univ. Paris-Sud, CNRS/IN2P3, Universit\'e Paris-Saclay, Orsay, France.\\ 
Jean-Paul Berthet, Francois Glotin, Jean-Michel Ortega,  Rui Prazeres 
\\ CLIO/ELISE/LCP, Univ. Paris-Sud, CNRS, Universit\'e Paris-Saclay, Orsay, France.\\
\textsuperscript{1}delerue@lal.in2p3.fr
\textsuperscript{2}hodnevuc@lal.in2p3.fr\\
\textsuperscript{3}also at National Taras Shevchenko University of Kyiv, Kyiv, Ukraine\\
  
        
} % Author email addresses
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%       INTRODUCTION
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\headerbox{Intro}{name=introduction,column=0,row=0}{
CLIO is a Free Electron Laser based on a thermoionic electron gun. Experimental comparison of Coherent Smith-Purcell Radiation (CSPR)  and Coherent Transition Radiation (CTR) will take place at CLIO accelerator. To measure and optimize the bunch length at CLIO we plan to use install a bunch length monitor at the exit of the AC at CLIO.
}

\headerbox{CTR}{name=ctr,column=0,row=0,below=introduction}{
\begin{center}
\includegraphics[width=\linewidth]{../MOPMB005f8.pdf}\\
\smaller \textit{CTR spectrums of the different bunch profiles from CLIO simulation}
\end{center}
Unlike the case of CSPR, CTR will only be used to estimate the bunch length and no detailed profile reconstruction will be attempted. %The discrimination between pulse length will therefore be based primarily on CTR intensity but to enhance this phenomena we will also use band-pass filters in THz wavelength. %
}




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%       RESULTS 1
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\headerbox{The CLIO accelerator}{name=results1,span=2,column=1,row=0}{ % To reduce this block to 1 column width, remove 'span=2'
  To predict the spectrums of CTR and CSPR and optimise the CLIO parameters for the experiment, we have performed simulations of  of the accelerator using ASTRA.%We simulate:
 % \begin{itemize}
 % \item thermionic gun $\rightarrow$ 1.5ns long bunch with 90keV energy
  %\item subharmonic buncher (SHB) $\rightarrow$ compression to 200 ps
 % \item fundamental buncher (FB) $\rightarrow$ further compression with acceleration
 % \item accelerating cavity (AC) $\rightarrow$ acceleration (typically 15-50 MeV)
 % \item solenoids $\rightarrow$ keep particles on orbit
 % \end{itemize}
\begin{center}
    \includegraphics*[width=1\textwidth]{../MOPMB005f1.png}\\
\smaller \textit{Layout of the CLIO accelerator (taken from).}
\end{center}

\begin{center}
  \includegraphics[width=0.47\linewidth]{../MOPMB005f3.pdf}
    \includegraphics[width=0.45\linewidth]{../MOPMB005f4.pdf}\\  
 \smaller \textit{Longitudinal bunch size at exit of gun (FWHM=800 ps), at the entrance of FB (FWHM=92 ps), at the entrance (FWHM=2.35ps) and at the exit (FWHM=2.29ps) of the AC at left figure and profile of the bunch at the exit of the acceleration cavity for different maximum fields of fundamental buncher (optimized) at right figure. }
  \end{center}
}

\headerbox{Bunch length measurements (CSPR)}{name=results2,span=3,column=0,below=ctr}{ % To reduce this block to 1 column width, remove 'span=2'
 %The bunch length monitor will use two different radiative phenomenon:  Coherent Smith-Purcell Radiation (CSPR)~and Coherent Transition Radiation (CTR)~. 
 Energy distribution of Coherent Smith-Purcell spectrum as a function of the observation angle for different maximum field in the FB at left. The grating used for these simulations is $40 mm\times180 mm$ with a pitch of $8mm$ and a blaze angle of $30^o$.
\begin{center}
\includegraphics[width=0.40\linewidth]{../MOPMB005f6.pdf}
\includegraphics[width=0.40\linewidth]{../MOPMB005f7.pdf}\\
\smaller \textit{ CSPR spectrums with original (left) and normalized (right) amplitude}
\end{center}


}


\end{poster}

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