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Performance of FoCal Strip Sensors During the Testbeam Run at CERN SPS

Performance of FoCal Strip Sensors During the Testbeam Run at CERN SPS. Signal And Noise. MIP peak and the pedestal peak (strip no. 40 ) in Y strip plane in the hodoscope module. For this channel the energy resolution is 5.3 KeV. The S/Nrms = 15.5.

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Performance of FoCal Strip Sensors During the Testbeam Run at CERN SPS

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  1. Performance of FoCal Strip Sensors During the Testbeam Run at CERN SPS

  2. Signal And Noise MIP peak and the pedestal peak (strip no. 40 ) in Y strip plane in the hodoscope module. For this channel the energy resolution is 5.3 KeV. The S/Nrms = 15.5 MIP peak and the pedestal peak (strip no. 64 ) in X strip plane in the hodoscope module. For this channel the energy resolution is 5.5 KeV. The S/Nrms = 15.

  3. MIP Estimation The MIP signal is obtained by calculating the hit position in the hodoscope strip plane based on the hit position in the strip plane inside the calorimeter, then summing the amplitudes in 3 strips, centered at the predicted position. The pedestal spectrum is the amplitude of the single strip, slightly apart from the center of the beam. The typical energy resolution (assuming MIP deposition = 82KeV) is 6.6 KeV, the equivalent noise charge ENC = 0.24-0.29 fC (1500-1800 electrons). The typical signal-to-noise (MIP MPV divided by RMS of the pedestal) is 12.5. Geant4 simulation of energy deposition of 1 GeV electron in 0.3mm of Silicon, Bremsstrahlung inactivated. The most probable value is 82 KeV. It is in agreement with the experimental values of 80 KeV.

  4. Hit Position Correlation Y position in hodoscope X position in hodoscope Correlation between hit positions in strip planes in the calorimeter (Y-axis) versus the same in the hodoscope (X-axis)

  5. Beam Image Beam image in hodoscope strip plane. Beam image in strip plane inside the calorimeter

  6. Amplitudes Amplitudes of all channels in the run 090629060741 selected with good clock phases (3 and 4).

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