Changeset 6648 for trunk/MagicSoft/TDAS-Extractor/Reconstruction.tex

Timestamp:

02/21/05 15:59:39 (20 years ago)

Author:

hbartko

Message:

*** empty log message ***

File:

• trunk/MagicSoft/TDAS-Extractor/Reconstruction.tex (modified) (3 diffs)

trunk/MagicSoft/TDAS-Extractor/Reconstruction.tex

@@ -3 +3 @@
 The FADC clock is not synchronized with the trigger. Therefore, the relative position of the recorded 
 signal samples varies  from event to event with respect to the position of the signal shape. 
-The time between the trigger decision and the first read-out sample is uniformly distributed in the range 
+The time $\Delta t$ between the trigger decision and the first read-out sample is uniformly distributed in the range 
 $t_{\text{rel}} \in [0,T_{\mathrm{FADC}}[$, where $T_{\mathrm{FADC}}=3.33$\,ns is the digitization period of the MAGIC 300\,MHz FADCs. 
-It can be determined using the reconstructed arrival time 
+$\Delta t$ can be determined using the reconstructed arrival time 
 $t_{\mathrm{arrival}}$.%directly by a time to digital converter (TDC) or 
 
@@ -30 +30 @@
 
 The asynchronous sampling of the pulse shape allows to determine an average pulse shape from the recorded 
-signal samples: The recorded signal samples can be shifted in time such that the shifted arrival times 
+signal samples: The recorded signal samples are shifted in time such that the shifted arrival times 
 of all events are equal. In addition, the signal samples are normalized event by event using the 
 reconstructed charge of the pulse. The accuracy of the signal shape reconstruction depends on the accuracy 
-of the arrival time and charge reconstruction. The statistical error of the reconstructed pulse shape is well below $10^{-2}$ while the systematical error is by definition unknown at first hand.
+of the arrival time and charge reconstruction. The relative statistical error of the reconstructed pulse shape is well below $10^{-2}$ while the systematical error is by definition unknown at first hand.
 
 
@@ -81 +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 
 much more frequently than gamma showers the reconstructed pulse shape of the cosmics events corresponds mainly to hadron induced showers. 
-The pulse shape due to electromagnetic air showers might be slightly different. The pulse shape for green calibration LED pulses is wider 
+The pulse shape due to electromagnetic air showers might be slightly different as indicated by MC simulations \cite{MC_timing_Indians}. The pulse shape for green calibration LED pulses is wider 
 and has a pronounced tail.