Changeset 6552
- Timestamp:
- 02/16/05 19:35:35 (20 years ago)
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trunk/MagicSoft/TDAS-Extractor/Reconstruction.tex
r6437 r6552 4 4 signal samples varies from event to event with respect to the position of the signal shape. 5 5 The time between the trigger decision and the first read-out sample is uniformly distributed in the range 6 $t_{\text{rel}} \in [0,T_{\mathrm{FADC}}[$, where $T_{\mathrm{FADC}}=3.33$ ns is the digitization period of the MAGIC 300MHz FADCs.6 $t_{\text{rel}} \in [0,T_{\mathrm{FADC}}[$, where $T_{\mathrm{FADC}}=3.33$\,ns is the digitization period of the MAGIC 300\,MHz FADCs. 7 7 It can be determined using the reconstructed arrival time 8 8 $t_{\mathrm{arrival}}$.%directly by a time to digital converter (TDC) or … … 52 52 In figure~\ref{fig:pulpo_shape_high} the high and the low gain pulses are clearly visible. The low gain pulse is attenuated by a factor of about 10 and delayed by about 55\,ns with respect to the high gain pulse. 53 53 54 Figure~\ref{fig:pul po_shape_low}shows the averaged normalized (to an area of 1FADC count * $T_{FADC}=3.33$ ns) reconstructed pulse shapes for the ``pulpo''54 Figure~\ref{fig:pulse_shapes} (left) shows the averaged normalized (to an area of 1FADC count * $T_{FADC}=3.33$ ns) reconstructed pulse shapes for the ``pulpo'' 55 55 pulses in the high and in the low gain, respectively. The input FWHM of the pulse generator pulses is 56 56 about 2\,ns. The FWHM of the average reconstructed high gain pulse shape is about 6.3\,ns, while the FWHM of … … 66 66 \begin{center} 67 67 \includegraphics[totalheight=7cm]{pulpo_shape_high_low_MC_TDAS.eps}%{pulpo_shape_low.eps} 68 \includegraphics[totalheight=7cm]{shape_green_UV_data_TDAS.eps}%{shape_green_high.eps} 68 69 \end{center} 69 \caption[Reconstructed pul po low gain shape.]{Average normalized reconstructed high gain and low gain pulse70 \caption[Reconstructed pulse shapes]{Left: Average normalized reconstructed high gain and low gain pulse 70 71 shapes from a pulpo run. 71 The FWHM of the low gain pulse is about 10 ns. The black line corresponds to the pulse shape implemented into the MC simulations \cite{MC-Camera}.} 72 \label{fig:pulpo_shape_low} 72 The FWHM of the low gain pulse is about 10 ns. 73 The black line corresponds to the pulse shape implemented into the MC simulations \cite{MC-Camera}. 74 Right: Average reconstructed high gain pulse shape for one green LED calibration run. 75 The FWHM is about 6.5 ns.} 76 \label{fig:pulse_shapes} 73 77 \end{figure} 74 78 75 Figure \ref{fig:shape_green_high}shows the normalized average reconstructed pulse shapes for green and UV calibration LED pulses~\cite{MAGIC-calibration}79 Figure~\ref{fig:pulse_shapes} (right) shows the normalized average reconstructed pulse shapes for green and UV calibration LED pulses~\cite{MAGIC-calibration} 76 80 as well as the normalized average reconstructed pulse shape for cosmics events. The pulse shape of the UV calibration pulses is quite similar to the 77 81 reconstructed pulse shape for cosmics events, both have a FWHM of about 6.3 ns. As air showers due to hadronic cosmic rays trigger the telescope … … 81 85 82 86 % The pulses shape has a FWHM of about 6.5 ns and a significant tail. 83 84 85 \begin{figure}[h!]86 \begin{center}87 \includegraphics[totalheight=7cm]{shape_green_UV_data_TDAS.eps}%{shape_green_high.eps}88 \end{center}89 \caption[Reconstructed green calibration high gain shape.]{Average reconstructed high gain pulse shape for one green LED calibration run.90 The FWHM is about 6.5 ns.}91 \label{fig:shape_green_high}92 \end{figure}93 94 87 95 88
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