source: trunk/MagicSoft/TDAS-Extractor/Performance.tex@ 5629

\section{Performance}
\ldots {\textit This section will be written after the previous one}

\subsection{Calibration}

In this section, we describe the tests performed using light pulses of different colour, 
pulse shapes and intensities with the MAGIC calibration pulser box. 
\par
The LED pulser system is able to provide fast light pulses of 3--4\,ns FWHM 
with intensities ranging from 3--4 photo-electrons to more than 500 in one inner pixel of the 
camera. These pulses can be produced in three colours $green$, $blue$ and $UV$.

\begin{table}[htp]
\centering
\begin{tabular}{|c|c|c|c|c|c|}
\hline
\hline
\multicolumn{6}{|c|}{The possible pulsed light colours} \\
\hline
\hline
Colour &  Wavelength & Spectral Width & Min. Nr. &  Max. Nr. & Secondary \\
      & [nm]         & [nm]           &  Phe's   &  Phe's    & Pulses  \\
\hline
Green &  520      & 40      & 6          &  120      & yes   \\
\hline
Blue &  460       & 30      & 6          &  500      & yes   \\
\hline
UV   &  375       & 12      & 3          &  50       & no  \\ 
\hline
\hline
\end{tabular}
\caption{The pulser colours available from the calibration system}
\label{tab:pulsercolours}
\end{table}

Table~\ref{tab:pulsercolours} lists the available colours and intensities. 
Whereas the UV-pulse is very stable, the green and blue pulses show sometimes smaller secondary 
pulses after about 10--40\,ns from the main pulse.
One can see that the very stable UV-pulses are unfortunately only available in such intensities as to 
not saturate the high-gain readout channel. However, the brightest combination of light pulses easily 
saturates all channels in the camera, but does not reach a saturation of the low-gain channel.
\par
Our tests can be classified into three subsections:

\begin{enumerate}
\item Stability tests: These include numbers of excluded pixels by the calibration software, 
numbers of reconstructed photo-electrons and counts of the numbers of outliers from the expected Gaussian 
distributions of reconstructed charges. 
\item Linearity tests: These test the linearity of the extractor with respect to pulses of different intensity 
and colour.
\item Time resolution: These tests show the time resolution and stability obtained with different 
intensities and colours.
\end{enumerate}

We used data taken on the 7$^{th}$ of June, 2004 with different pulser LED combinations, each taken with 
16384 events. The corresponding run numbers range from nr. 31741 to 31772.
\par
Although, we looked at and tested all colour and extractor combinations resulting from these data, 
we will refrain ourselves to show here only exemplary behaviour and results of extractors. All taken  
``control'' plots including those which are not displayed here, can be retrieved from the following 
locations:

\begin{verbatim}
http://www.magic.ifae.es/~markus/pheplots/
http://www.magic.ifae.es/~markus/timeplots/
\end{verbatim}

\subsubsection{Stability tests}

\begin{figure}[htp]
\centering
\includegraphics[height=0.95\textheight]{UnsuitVsExtractor-1LedUV-Colour-04.eps}
\caption{Uncalibrated pixels and pixels outside of the Gaussian distribution for a very low 
intensity pulse.}
\end{figure}

\subsubsection{Linearity tests}



\subsubsection{Time resolution}




\subsection{Pulpo Pulses}
\subsection{MC Data}
\subsection{Cosmics Data?}
The results of this subsection are based on the following runs taken
on the 21st of September 2004.
\begin{itemize}
\item{Run 39000}: OffCrab11 at 19.1 degrees zenith angle and 106.2
azimuth.
\item{Run 39182}: CrabNebula at 19.0 degrees zenith angle and 106.0 azimuth.
\end{itemize}

\subsection{Pedestals}


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