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Réponse en courant des détecteurs silicium aux particules chargées et aux ions lourds

Abstract : This work consisted in collecting and studying for the first time the shapes of current signals obtained from charged particles or heavy ions produced by silicon detectors. The document is divided into two mean parts. The first consisted in reducing the experimental data obtained with charged particles as well as with heavy ions. These experiments proceeded at the Orsay Tandem and at GANIL using LISE. These two experiments enabled us to create a data base formed of current signals with various shapes and various times of collection. The second part consisted in carrying out a simulation of the current signals obtained from the various ions. To obtain this simulation we propose a new model describing the formation of the signal. We used the data base of the signals obtained in experiments in order to constrain the three parameters of our model. In this model, the charge carriers created are regarded as dipoles and their density is related to the dielectric polarization in the silicon detector. This phenomenon induces an increase in permittivity throughout the range of the incident ion and consequently the electric field between the electrodes of the detector is decreased inside the trace. We coupled with this phenomenon a dissociation and extraction mode of the charge carriers so that they can be moved in the electric field.
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Contributor : Hassen Hamrita <>
Submitted on : Wednesday, September 14, 2005 - 4:28:36 PM
Last modification on : Wednesday, December 9, 2020 - 3:06:32 PM
Long-term archiving on: : Friday, April 2, 2010 - 10:03:21 PM


  • HAL Id : tel-00010145, version 1


Hassen Hamrita. Réponse en courant des détecteurs silicium aux particules chargées et aux ions lourds. Physique Nucléaire Théorique [nucl-th]. Université Pierre et Marie Curie - Paris VI, 2005. Français. ⟨tel-00010145⟩



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