Changeset 5625
- Timestamp:
- 12/19/04 17:38:06 (20 years ago)
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trunk/MagicSoft/TDAS-Extractor/Performance.tex
r5616 r5625 1 1 \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} 3 3 4 4 \subsection{Calibration} … … 9 9 The LED pulser system is able to provide fast light pulses of 3--4\,ns FWHM 10 10 with 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):11 camera. These pulses can be produced in three colours $green$, $blue$ and $UV$. 12 12 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 21 Colour & Wavelength & Spectral Width & Min. Nr. & Max. Nr. & Secondary \\ 22 & [nm] & [nm] & Phe's & Phe's & Pulses \\ 23 \hline 24 Green & 520 & 40 & 6 & 120 & yes \\ 25 \hline 26 Blue & 460 & 30 & 6 & 500 & yes \\ 27 \hline 28 UV & 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} 18 35 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 36 Table~\ref{tab:pulsercolours} lists the available colours and intensities. 37 Whereas the UV-pulse is very stable, the green and blue pulses show sometimes smaller secondary 38 pulses after about 10--40\,ns from the main pulse. 29 39 One can see that the very stable UV-pulses are unfortunately only available in such intensities as to 30 40 not saturate the high-gain readout channel. However, the brightest combination of light pulses easily … … 35 45 \begin{enumerate} 36 46 \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 Gaussian38 reconstructed charge distributions.47 numbers of reconstructed photo-electrons and counts of the numbers of outliers from the expected Gaussian 48 distributions of reconstructed charges. 39 49 \item Linearity tests: These test the linearity of the extractor with respect to pulses of different intensity 40 50 and colour. 41 \item Time resolution: These tests 51 \item Time resolution: These tests show the time resolution and stability obtained with different 52 intensities and colours. 42 53 \end{enumerate} 54 55 We used data taken on the 7$^{th}$ of June, 2004 with different pulser LED combinations, each taken with 56 16384 events. The corresponding run numbers range from nr. 31741 to 31772. 57 \par 58 Although, we looked at and tested all colour and extractor combinations resulting from these data, 59 we 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 61 locations: 62 63 \begin{verbatim} 64 http://www.magic.ifae.es/~markus/pheplots/ 65 http://www.magic.ifae.es/~markus/timeplots/ 66 \end{verbatim} 43 67 44 68 \subsubsection{Stability tests} … … 78 102 %%% TeX-master: "MAGIC_signal_reco" 79 103 %%% TeX-master: "MAGIC_signal_reco." 104 %%% TeX-master: "MAGIC_signal_reco" 80 105 %%% End:
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