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Timestamp:
02/16/05 20:10:09 (20 years ago)
Author:
gaug
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*** empty log message ***
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  • trunk/MagicSoft/TDAS-Extractor/Algorithms.tex

    r6555 r6556  
    670670$e\tau(t_0)=\sum_{i=0}^{i=n-1} w_{\mathrm{time}}(t_0+i \cdot T_{\text{ADC}})y(t_0+i \cdot T_{\text{ADC}})$ as a function of the time shift $t_0$.}
    671671\label{fig:amp_sliding}
    672 \end{figure}in the high gain
    673 
    674 
    675 %\ldots
    676 %\textit {\bf FIGURE~\ref{fig:shape_fit_TDAS} shows what???}
    677 %\ldots
    678 
    679 %Figure \ref{fig:shape_fit_TDAS} shows the FADC slices of a single MC event together with the result of a full  fit of the input MC pulse shape to the simulated FADC samples together with the result of the numerical fit  using the digital filter.
    680 
    681 
     672\end{figure}
    682673
    683674Figure \ref{fig:shape_fit_TDAS} shows the simulated signal pulse shape of a typical MC event together with the simulated FADC slices of the signal pulse plus noise. The digital filter has been applied to reconstruct the signal size and timing. Using this information together with the average normalized MC pulse shape the simulated signal pulse shape is reconstructed and shown as well.
     
    774765\subsubsection{Real Fit to the Expected Pulse Shape }
    775766
    776 This extractor is not yet implemented as MARS-class... \ldots {\it Hendrik, Wolfgang ... }
    777 \par
    778 
    779767The digital filter is a sophisticated numerical tool to fit the read-out FADC samples with the expected wave form taking the autocorrelation of the noise into account. In order to cross-check the results a pulse shape fit has been implemented using the root TH1::Fit routine. For each event the FADC samples of each pixel are filled into a histogram and fit by the expected wave form having the time shift and the area of the fit pulse as free parameters. The results are in very good agreement with the results of the digital filter.
    780768
    781769Figure \ref{fig:probability_fit} shows the distribution of the fit probability for simulated MC pulses. Both electronics and NSB noise are simulated. The distribution is mainly flat with a slight excess in the very lowest probability bins.
     770\par
     771
     772This extractor is not (yet) implemented as a MARS-class.
    782773
    783774
     
    865856\item SetWeightsFile(``calibration\_weights\_blue.dat'');
    866857\item SetWeightsFile(``calibration\_weights4\_blue.dat'');
    867 \suspend{enumerate}
    868 \item[MExtractTimeAndChargeDigitalFilterPeakSearch]: with the following initialization:
    869 \resume{enumerate}
    870 \item SetWeightsFile(``calibration\_weights4\_UV.dat''); SetRange(0,20,0,14); \\
    871    SetOffsetLeftFromPeak(3); SetOffsetRightFromPeak(3); \\
    872    SetPeakSearchWindowSize(2);
    873 \suspend{enumerate}
    874 \item[``Real Fit'']: (not yet implemented, one try)
    875 \resume{enumerate}
    876 \item Real Fit
    877858\end{enumerate}
    878859\end{description}
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