Changeset 6556 for trunk/MagicSoft
- Timestamp:
- 02/16/05 20:10:09 (20 years ago)
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trunk/MagicSoft/TDAS-Extractor/Algorithms.tex
r6555 r6556 670 670 $e\tau(t_0)=\sum_{i=0}^{i=n-1} w_{\mathrm{time}}(t_0+i \cdot T_{\text{ADC}})y(t_0+i \cdot T_{\text{ADC}})$ as a function of the time shift $t_0$.} 671 671 \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} 682 673 683 674 Figure \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. … … 774 765 \subsubsection{Real Fit to the Expected Pulse Shape } 775 766 776 This extractor is not yet implemented as MARS-class... \ldots {\it Hendrik, Wolfgang ... }777 \par778 779 767 The 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. 780 768 781 769 Figure \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 771 772 This extractor is not (yet) implemented as a MARS-class. 782 773 783 774 … … 865 856 \item SetWeightsFile(``calibration\_weights\_blue.dat''); 866 857 \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 Fit877 858 \end{enumerate} 878 859 \end{description}
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