SILICON TUNGSTEN CALORIMETER FOR FUTURE LINEAR COLLIDER EXPERIMENT

Full text: The new detector concept for high energy particle physics will be in a future linear electron positron collider in TeV scale [1]. The main goal of the international linear collider (ILC) to study the physics of top quark, search the Higgs particle in low and medium energy range, supersymmetry particle and etc. In this, experiment the electron-positron will be collide center-of-mass energy between 0.2 and 1 TeV. The installed detector will be placed around of collision point at 5 T magnetic field. To reconstruct of the final state of the produced particle the Particle Flow Algorithm (PFA) is developed. For the reconstruction of every single particle, the detector resolution should be∼30%/?E(GeV). In addition, for the reconstruction of the single event the required tracking system with calorimetry have to be able very good performance. The main crucial part of detector at the ILC is a calorimetry. The calorimeter is going to detect the photons, electrons, positrons (Electromagnetic Calorimeter - ECAL) and hadrons (Hadronic Calorimeter - HCAL) [2]. The ECAL for future ILC will be placed inside the magnetic field and surround the interaction point. Main requirements of the calorimeter it's compactness. Therefore, this requirement led to use tungsten radiator and silicon for the sensitive medium. In addition, for the particle separation after the interaction of electron-positron the calorimeter has agood granularity. Those requirements bring to use 108 readout cells for ECAL.For this reason silicon wafer with 5?5mm2 pad size is going to use active medium of calorimeter. The new concept of detector is called Silicon Tungsten electromagnetic calorimeter.To readout the 144 channels silicon wafer the new front-end ASIC (Applied Specific Integrated Circuit) chip has been designed within the collaboration. The designed chip is contains of analog and digital memory, 12-bit resolution TDC and dual gain ADC to provide the time and charge information for 36 preamplifers (channels). In conclusion, the developed and designed readout electronics with high performance can led torealization of Silicon Tungsten electromagnetic calorimeter for future high energy particle physics.