Changeset 5625


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Timestamp:
12/19/04 17:38:06 (20 years ago)
Author:
gaug
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  • trunk/MagicSoft/TDAS-Extractor/Performance.tex

    r5616 r5625  
    11\section{Performance}
    2 \ldots {\it This section will be written after the previous one}
     2\ldots {\textit This section will be written after the previous one}
    33
    44\subsection{Calibration}
     
    99The LED pulser system is able to provide fast light pulses of 3--4\,ns FWHM
    1010with intensities ranging from 3--4 photo-electrons to more than 500 in one inner pixel of the
    11 camera. These pulses can be produced in three colours (``errors'' denote the spectral width):
     11camera. These pulses can be produced in three colours $green$, $blue$ and $UV$.
    1212
    13 \begin{itemize}
    14 \item Green: 520$\pm$40\,nm
    15 \item Blue:  460$\pm$30\,nm
    16 \item UV:    375$\pm$12\,nm
    17 \end{itemize}
     13\begin{table}[htp]
     14\centering
     15\begin{tabular}{|c|c|c|c|c|c|}
     16\hline
     17\hline
     18\multicolumn{6}{|c|}{The possible pulsed light colours} \\
     19\hline
     20\hline
     21Colour &  Wavelength & Spectral Width & Min. Nr. &  Max. Nr. & Secondary \\
     22      & [nm]         & [nm]           &  Phe's   &  Phe's    & Pulses  \\
     23\hline
     24Green &  520      & 40      & 6          &  120      & yes   \\
     25\hline
     26Blue &  460       & 30      & 6          &  500      & yes   \\
     27\hline
     28UV   &  375       & 12      & 3          &  50       & no  \\
     29\hline
     30\hline
     31\end{tabular}
     32\caption{The pulser colours available from the calibration system}
     33\label{tab:pulsercolours}
     34\end{table}
    1835
    19 Whereas the UV-pulse is very stable, the green and blue pulses show sometimes secondary pulses after
    20 about 10--40\,ns from the real pulse.
    21 \par
    22 Available intensities depend on the involved pulser light colour:
    23 \begin{itemize}
    24 \item Green: 6 -- 120 phes
    25 \item Blue:  6 -- 500 phes
    26 \item UV:    3 -- 50 phes
    27 \end{itemize}
    28 
     36Table~\ref{tab:pulsercolours} lists the available colours and intensities.
     37Whereas the UV-pulse is very stable, the green and blue pulses show sometimes smaller secondary
     38pulses after about 10--40\,ns from the main pulse.
    2939One can see that the very stable UV-pulses are unfortunately only available in such intensities as to
    3040not saturate the high-gain readout channel. However, the brightest combination of light pulses easily
     
    3545\begin{enumerate}
    3646\item Stability tests: These include numbers of excluded pixels by the calibration software,
    37 numbers of reconstructed photo-electrons and counts of the numbers of outliers from the Gaussian
    38 reconstructed charge distributions.
     47numbers of reconstructed photo-electrons and counts of the numbers of outliers from the expected Gaussian
     48distributions of reconstructed charges.
    3949\item Linearity tests: These test the linearity of the extractor with respect to pulses of different intensity
    4050and colour.
    41 \item Time resolution: These tests
     51\item Time resolution: These tests show the time resolution and stability obtained with different
     52intensities and colours.
    4253\end{enumerate}
     54
     55We used data taken on the 7$^{th}$ of June, 2004 with different pulser LED combinations, each taken with
     5616384 events. The corresponding run numbers range from nr. 31741 to 31772.
     57\par
     58Although, we looked at and tested all colour and extractor combinations resulting from these data,
     59we will refrain ourselves to show here only exemplary behaviour and results of extractors. All taken 
     60``control'' plots including those which are not displayed here, can be retrieved from the following
     61locations:
     62
     63\begin{verbatim}
     64http://www.magic.ifae.es/~markus/pheplots/
     65http://www.magic.ifae.es/~markus/timeplots/
     66\end{verbatim}
    4367
    4468\subsubsection{Stability tests}
     
    78102%%% TeX-master: "MAGIC_signal_reco"
    79103%%% TeX-master: "MAGIC_signal_reco."
     104%%% TeX-master: "MAGIC_signal_reco"
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