Abstract
Verification and extensions of the Gaussian cloud dynamics model (1) for the induced current signal in silicon detectors are presented. The approach is based on Ramo- Shockley theorem where, in addition to electrodes field, Coulomb interactions between electron and hole clouds are considered. The preliminary results provide good description of subtle experimental observations gathered by FAZIA collaboration concerning Pulse Shape Analysis (PSA). Focus is put on ion identification and on the factors impacting this mechanism.
Highlights
Introduction and model descriptionParticles and fragments identification is of critical importance for nuclear physics
In recent years much attention is paid to Pulse Shape Analysis method which is governed by Plasma Delay Effect
Charged particles enter silicon detector and create plasma column which length and local charge density are related to Z, mass and particle energy
Summary
Particles and fragments identification is of critical importance for nuclear physics. That approach was proposed in 1963 [2] and described formally in 1968 [3] importance of carriers collection times was highlighted. Charged particles enter silicon detector and create plasma column which length and local charge density are related to Z, mass and particle energy. Pulse rise time (correlated via preamplifier factor to collection time) depends on ionization column dispersion time and drift time of carriers.
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