Changeset 6534 for trunk/MagicSoft/TDAS-Extractor

Timestamp:

02/16/05 16:48:39 (20 years ago)

Author:

gaug

Message:

*** empty log message ***

File:

• trunk/MagicSoft/TDAS-Extractor/Calibration.tex (modified) (2 diffs)

trunk/MagicSoft/TDAS-Extractor/Calibration.tex

@@ -383 +383 @@
 
 \par
-Figure~\ref{fig:linear:phevscharge4} shows the conversion factor $c_{phe}$ 
-obtained for different light intensities 
+Figure~\ref{fig:linear:phevscharge4} shows the conversion factor $c_{phe}$ obtained for different light intensities 
 and colours for three exemplary inner and three exemplary outer pixels using a fixed window on 
 8 FADC slices. The conversion factor seems to be linear to a good approximation, 
@@ -427 +426 @@
 \end{figure}
 
+\begin{figure}[h!]
+\centering
+\includegraphics[width=0.99\linewidth]{PheVsCharge-11.eps}
+\caption{Example of a the development of the conversion factor FADC counts to photo-electrons for three 
+exemplary inner pixels (upper plots) and three exemplary outer ones (lower plots) obtained with the extractor 
+{\textit{MExtractFixedWindowPeakSearch}} 
+on a window size of 2 high-gain and 2 low-gain slices (extractor \#11). }
+\label{fig:linear:phevscharge11}
+\end{figure}
+
+Figure~\ref{fig:linear:phevscharge11} shows the conversion factors using a fixed window with global peak search 
+integrating a window of 2 FADC slices. One can see that the linearity is completely lost! Especially in the low-gain, 
+the reconstructed number of photo-electrons is much too low and the conversion factors bend down. A similiar behaviour can 
+be found for all extractors with window sizes smaller than 6 FADC slices, especially in the low-gain region. (This behaviour 
+was already visible in the investigations on the number of photo-electrons in the previous section~\ref{sec:photo-electrons}).
+\par
 Figure~\ref{fig:linear:phevscharge20} shows the conversion factors using a sliding window of 6 FADC slices. 
 The linearity is maintained like in the previous examples, except for the smallest signals the effect