Title: Performance evaluation of PSD for silicon ECAL,
Abstract: We are developing position sensitive silicon detectors (PSD) which have an
electrode at each of four corners so that the incident position of a charged
particle can be obtained using signals from the electrodes. It is expected that
the position resolution the electromagnetic calorimeter (ECAL) of the ILD
detector will be improved by introducing PSD into the detection layers. In this
study, we irradiated collimated laser beams to the surface of the PSD, varying
the incident position. We found that the incident position can be well
reconstructed from the signals if high resistance is implemented in the p+
layer. We also tried to observe the signal of particles by placing a radiative
source on the PSD sensor.