Changeset 5909 for trunk

Timestamp:

01/20/05 12:58:33 (20 years ago)

Author:

gaug

Message:

*** empty log message ***

File:

• trunk/MagicSoft/TDAS-Extractor/Algorithms.tex (modified) (10 diffs)

trunk/MagicSoft/TDAS-Extractor/Algorithms.tex

@@ -60 +60 @@
   The pedestals get subtracted automatically {\textit {\bf after}} execution of these two functions.
 
-\item[MExtractTime:\xspace] This class provides - additionally to those already declared in {\textit{\bf MExtractor}}, 
+\item[MExtractTime:\xspace] This class provides - additionally to those already declared in {\textit{\bf MExtractor}} - 
   the basic data members equal for all time extractors which are:
   \begin{enumerate}
-  \item Pointers to the used storage containers {\textit{\bf MArrivalTimeCam}}
+  \item Pointer to the used storage container {\textit{\bf MArrivalTimeCam}}
     parameterized by the variables 
     {\textit{\bf fArrTime}}.
@@ -86 +86 @@
 
 \item[MExtractTimeAndCharge:\xspace] This class provides - additionally to those already declared in 
-  {\textit{\bf MExtractor}} and {\textit{\bf MExtractTime}}, 
+  {\textit{\bf MExtractor}} and {\textit{\bf MExtractTime}} - 
   the basic data members equal for all time and charge extractors which are:
   \begin{enumerate}
@@ -109 +109 @@
 
   where the pointers ``firstused'' point to the first used FADC slice declared by the extraction ranges,
-  the pointer ``lowgain'' point to the beginning of the low-gain FADC slices array (to be used for 
-  pulses reaching into the low-gain array),
+  the pointer ``logain'' point to the beginning of the low-gain FADC slices array (to be used for 
+  pulses reaching into the ``low-gain'' array),
   the variables ``sum'', ``dsum'' get filled with the 
   extracted signal and its error. The variables ``time'', ``dtime'' and ``sat'' get filled with the 
@@ -131 +131 @@
 \end{itemize}
 
-The following freely adjustable parameters have to be set from outside: 
-\begin{description}
-\item[Global extraction limits:\xspace] Limits in between the extractor is allowed 
-to search, independently for high gain and low gain. 
+The following  adjustable parameters have to be set from outside: 
+\begin{description}
+\item[Global extraction limits:\xspace] Limits in between which the extractor is allowed 
+to extract the signal, for high gain and low gain, respectively. 
 \end{description}
 
@@ -146 +146 @@
 \subsubsection{Fixed Window}
 
-This extractor is implemented in the MARS-class {\textit{MExtractFixedWindow}}.
-It simply adds the FADC contents in the assigned ranges. 
+This extractor is implemented in the MARS-class {\textit{\bf MExtractFixedWindow}}.
+It simply adds the FADC slice contents in the assigned ranges. 
 As it does not correct for the clock-noise, only an even number of samples is allowed.
 Figure~\ref{fig:fixedwindowsketch} gives a sketch of the used extraction ranges for this 
@@ -156 +156 @@
   \includegraphics[width=0.49\linewidth]{MExtractFixedWindow_23Led_Blue.eps}
 \caption[Sketch extraction ranges MExtractFixedWindow]{%
-Sketch of the extraction ranges for the extractor {\textit{MExtractFixedWindow}} 
+Sketch of the extraction ranges for the extractor {\textit{\bf MExtractFixedWindow}} 
 for two typical calibration pulses (pedestals have been subtracted) and a typical inner pixel.
-The pulse would be shifted half a slice to the right for an outer pixels. }
+The pulse would be shifted half a slice to the right for an outer pixel. }
 \label{fig:fixedwindowsketch}
 \end{figure}
@@ -165 +165 @@
 \subsubsection{Fixed Window with Integrated Cubic Spline}
 
-This extractor is implemented in the MARS-class {\textit{MExtractFixedWindowSpline}},
-using a cubic spline algorithm, adapted from \cite{NUMREC}. 
-It integrated the 
-spline interpolated FADC slice values. The edge slices are counted as half.
+This extractor is implemented in the MARS-class {\textit{\bf MExtractFixedWindowSpline}}. It
+uses a cubic spline algorithm, adapted from \cite{NUMREC} and integrates the 
+spline interpolated FADC slice values from a fixed extraction range. The edge slices are counted as half.
 As it does not correct for the clock-noise, only an odd number of samples is allowed.
 Figure~\ref{fig:fixedwindowsplinesketch} gives a sketch of the used extraction ranges for this 
@@ -177 +176 @@
   \includegraphics[width=0.49\linewidth]{MExtractFixedWindowSpline_23Led_Blue.eps}
 \caption[Sketch extraction ranges MExtractFixedWindowSpline]{%
-Sketch of the extraction ranges for the extractor {\textit{MExtractFixedWindowSpline}} 
+Sketch of the extraction ranges for the extractor {\textit{\bf MExtractFixedWindowSpline}} 
 for two typical calibration pulses (pedestals have been subtracted) and a typical inner pixel. 
-The pulse would be shifted half a slice to the right for an outer pixels. }
+The pulse would be shifted half a slice to the right for an outer pixel. }
 \label{fig:fixedwindowsplinesketch}
 \end{figure}
@@ -185 +184 @@
 \subsubsection{Fixed Window with Global Peak Search}
 
-This extractor is implemented in the MARS-class {\textit{MExtractFixedWindowPeakSearch}}.
-It fixes first a reference point defined as the highest sum of 
-consecutive non-saturating FADC slices in a (smaller) peak-search window. This reference 
-point removes the coherent movement of the arrival times in the whole camera due to the trigger jitter.
+This extractor is implemented in the MARS-class {\textit{\bf MExtractFixedWindowPeakSearch}}.
+The basic idea of this extractor is to correct for coherent movements in arrival time for all pixels, 
+as e.g. caused by the trigger jitter.  
+In a first loop, it fixes a reference point defined as the highest sum of 
+consecutive non-saturating FADC slices in a (smaller) peak-search window.
 \par
 In a second loop over the pixels, 
-it adds the FADC contents starting from a pre-defined point before the obtained peak-search window 
+it adds the FADC contents starting from a pre-defined offset from the obtained peak-search window 
 over an extraction window of a pre-defined window size.
 It loops twice over all pixels in every event, because it has to find the reference point, first. 
 As it does not correct for the clock-noise, only an even number of samples is allowed.
 
-The following freely adjustable parameters have to be set from outside: 
-\begin{description}
-\item[Peak Search Window:\xspace] Defines the ``sliding window'' in which the peaking sum is 
+The following  adjustable parameters have to be set from outside: 
+\begin{description}
+\item[Peak Search Window:\xspace] Defines the ``sliding window'' size within which the peaking sum is 
 searched for (default: 4 slices)
 \item[Offset from Window:\xspace] Defines the offset of the start of the extraction window w.r.t. the 
@@ -691 +691 @@
 %%% TeX-master: "MAGIC_signal_reco"
 %%% TeX-master: "MAGIC_signal_reco"
+%%% TeX-master: "MAGIC_signal_reco"
 %%% End: