Index: /trunk/MagicSoft/TDAS-Extractor/Calibration.tex =================================================================== --- /trunk/MagicSoft/TDAS-Extractor/Calibration.tex (revision 6622) +++ /trunk/MagicSoft/TDAS-Extractor/Calibration.tex (revision 6623) @@ -5,6 +5,6 @@ pulse shapes and intensities with the MAGIC LED Calibration Pulser Box \cite{hardware-manual}. \par -The LED pulser system is able to provide fast light pulses of 3--4\,ns FWHM -with intensities ranging from 3--4 to more than 500 photo-electrons in one inner photo-multiplier of the +The LED pulser system is able to provide fast light pulses of 2--4\,ns FWHM +with intensities ranging from 3--4 to more than 600 photo-electrons in one inner photo-multiplier of the camera. These pulses can be produced in three colours {\textit {\bf green, blue}} and {\textit{\bf UV}}. @@ -23,5 +23,5 @@ Green & 520 & 40 & 6 & 120 & yes & 3--4 \\ \hline -Blue & 460 & 30 & 6 & 500 & yes & 3--4 \\ +Blue & 460 & 30 & 6 & 600 & yes & 3--4 \\ \hline UV & 375 & 12 & 3 & 50 & no & 2--3 \\ @@ -36,7 +36,7 @@ figures~\ref{fig:pulseexample1leduv} and~\ref{fig:pulseexample23ledblue} show exemplary pulses as registered by the FADCs. -Whereas the UV-pulse is very stable, the green and blue pulses show sometimes smaller secondary +Whereas the UV-pulse is rather stable, the green and blue pulses can show 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 +One can see that the 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 readout. @@ -81,7 +81,7 @@ \end{figure} -We used data taken on the 7$^{th}$ of June, 2004 with different pulser LED combinations, each taken with +We used data taken on the 7$^{\mathrm{th}}$ of June, 2004 with different pulser LED combinations, each taken with 16384 events. 19 different calibration configurations have been tested. -The corresponding MAGIC data run numbers range from nr. 31741 to 31772. These data was taken +The corresponding MAGIC data run numbers range from nr. 31741 to 31772. These data have been taken before the latest camera repair access which resulted in a replacement of about 2\% of the pixels known to be mal-functioning at that time. @@ -144,8 +144,7 @@ \centering \includegraphics[width=0.95\linewidth]{Outlier.eps} -\caption{Example of an event classified as ``un-calibrated''. The histogram has been obtained +\caption{Example of an event classified as ``outlier''. The histogram has been obtained using the digital filter (extractor \#32) applied to a high-intensity blue pulse (run 31772). -The event marked as ``outlier'' clearly has been mis-reconstructed. It lies outside the 5 sigma -region from the fitted mean.} +The event marked as ``outlier'' clearly has been mis-reconstructed. It lies outside the 5$\sigma$--region from the fitted mean.} \label{fig:outlier} \end{figure} @@ -206,5 +205,5 @@ less pixels than the corresponding ``fixed window''-ones (extractors \#1--16). -The spline (extractors \#23--27) and the digital filter with the correct weights (extractors \#30-33) discard +The spline (extractors \#23--27) and the digital filter with the correct weights (extractors \#30-31) discard the least number of pixels and are also robust against slight modifications of the pulse form (of the weights for the digital filter). @@ -212,5 +211,4 @@ Concerning the numbers of outliers, one can conclude that in general, the numbers are very low never exceeding 0.1\% except for the amplitude-extracting spline which seems to mis-reconstruct a certain type of events. -It seems however that the spline algorithm extracting the amplitude of the signal produces an over-proportional \par In conclusion, already this first test excludes all extractors with too large window sizes because @@ -276,5 +274,6 @@ This has to do with the fact that the fixed window extractors fail to catch a significant part of the (larger) pulse because of the -1~FADC slice event-to-event jitter. Also the sliding windows smaller than 6 FADC slices and the spline smaller than +1~FADC slice event-to-event jitter and the larger pulse width covering about 6 FADC slices. +Also the sliding windows smaller than 6 FADC slices and the spline smaller than 2 FADC slices reproduce too small numbers of photo-electrons. Moreover, the digital filter shows a small dependency of the number of photo-electrons w.r.t. the extration window. @@ -334,8 +333,7 @@ by the secondary pulses, except for the digital filter. \par -The extractor {\textit{\bf MExtractTimeAndChargeDigitalFilter}} seems to be stable against modifications in the +The extractor {\textit{\bf MExtractTimeAndChargeDigitalFilter}} seems to be sufficiently stable against modifications of the exact form of the weights in the high-gain readout channel since all applied weights yield about -the same number of photo-electrons and the same ratio of outer vs. inner pixels, except if one applies the cosmics -weights to the very low-intensity pulse $1\,LED\,UV$ where a slight increase in photo-electrons is observed. +the same number of photo-electrons and the same ratio of outer vs. inner pixels. \par All sliding window and spline algorithms yield a stable ratio of outer vs. inner pixels in the high and the low-gain. @@ -346,5 +344,6 @@ not correct. All sliding window algorithms seem to reproduce the correct numbers if one takes into account the after-pulse behaviour of the light pulser itself. The digital filter seems to be -stable against changing the pulse width from 1~to~4\,ns. +stable against modifications of the intrinsic pulse width from 1~to~4\,ns. This is the expected range within which the pulses from +realistic cosmics signals may vary. \clearpage Index: /trunk/MagicSoft/TDAS-Extractor/MAGIC_signal_reco.tex =================================================================== --- /trunk/MagicSoft/TDAS-Extractor/MAGIC_signal_reco.tex (revision 6622) +++ /trunk/MagicSoft/TDAS-Extractor/MAGIC_signal_reco.tex (revision 6623) @@ -17,4 +17,5 @@ \usepackage{url} \usepackage{mdwlist} +\usepackage{lscape} \setlength{\parindent}{0cm} Index: /trunk/MagicSoft/TDAS-Extractor/Results.tex =================================================================== --- /trunk/MagicSoft/TDAS-Extractor/Results.tex (revision 6622) +++ /trunk/MagicSoft/TDAS-Extractor/Results.tex (revision 6623) @@ -67,6 +67,6 @@ test, without being among the best. \no\ means that the extractor has severely failed the test and should not be taken because of that reason. \best\ means that the extractor(s) have come out as best of the particular test.} +\label{tab:result} } -\label{tab:result} \end{table}