EUDET JRA3, Activity Obninsk State University DESY. EUDET meeting 8-9 Dec 2005, DESY Valeri Saveliev Obninsk State University, Russia / DESY, Hamburg

Main Activity in Frame JRA3 Physics and Detector Simulation, R&D project on the New Photodetectors for ILC Hadron Calorimeter System New concept of Hadron Calorimeter System on Base Fe/Si structure, 8 Dec 2005 Valeri Saveliev

Physics and Detector Simulation Study of the SM Higgs Sensitivity, Study the Response of ILC Spectrometer with full Monte Carlo Simulation Frames: Geant3, Geant4, Prototype Study and Analysis of experimental data from Test Beams 8 Dec 2005 Valeri Saveliev

Physics and Detector Simulation We got the funding for the development the regional branch of Net for the Grid Mathematical Modeling, Start the modernization of the Computer Cluster 8 Dec 2005 Valeri Saveliev

R&D New Photodetectors for ILC Hadron Calorimeter Concept of Hadron Sc Tile Calorimeter – with direct light readout from Scintillator Tile by SiPM Sc. Cells SiPM module WLS 8 Dec 2005 Valeri Saveliev

R&D New Photodetectors for ILC Hadron Calorimeter New Concept of Hadron Sc Tile Calorimeter – direct light readout from Scintillator Tile by Advance Silicon Photomultiplier Sc. Cell Sc. Cell SiPM 8 Dec 2005 Valeri Saveliev

R&D Project on the New Photodetector Study of the Light Balance and Propagation in the Sc Tiles for the ILC Hadron Calorimeter , Development of the Advance Silicon Photomultipliers, Test setup for the Testing of the Scintillator Tile – Advance Silicon Photomultiplier, Prototyping and Test of the Stintillator - Silicon Photomultiplier Hadron Calorimeter Modules, 8 Dec 2005 Valeri Saveliev

R&D Project on the New Photodetector Collaboration with: SensL, Cork, Ireland Company with connection to the TYNDAL National Institute of Ireland ( Advance Si technology ) 8 Dec 2005 Valeri Saveliev

Concept of Hadron Sc Tail Calorimeter with Direct Readout Tasks: Blue range sensitivity of the Advance Silicon Photomultiplier, Large area of the Advance Silicon Photomultiplier. 8 Dec 2005 Valeri Saveliev

SiPM Technology General view 1x1 mm, Common Electrode Layout, Microcells with Quenching Mechanism Trench technology, 8 Dec 2005 Valeri Saveliev

SiPM Trench Technology Cork University Study Result: the trenches reduce the probability that a crosstalk event occurs during the detection of an incident photon from 50% to below 1%. Measurements of the cross talk probability versus the distance between the pixels show an excellent agreement with the model. Trench Technology for preventing Optical Crosstalk, High Filling Factor (Geometrical Efficiency) 8 Dec 2005 Valeri Saveliev

Future Combination of the Sensors and FE Electronics in the same technology Process. 8 Dec 2005 Valeri Saveliev

New concept of Hadron Calorimeter System on Base Fe/Si structure Tendency to build the Compact ILC Spectrometer, gives the possibility to thinking about full Fe/Si Hadron Calorimeter, analog or semidigital, The Basis for such Study is exist, problem mainly in cost, but probably time is enough… We are going to look on that. 8 Dec 2005 Valeri Saveliev

Plans Define the plans of activity in frame EUDET , Proposal in Russia for Funding from Russian Ministry of Education and Science 8 Dec 2005 Valeri Saveliev

SiPM Performance Dynamic Range – is defined by fine structure of SiPM Low Photon Flux Spectrum P P Q1phe Identity of microcells is very high: the width of 1 phe peak is the distribution of signals from 1440 microcells due to photons is randomly distributed across the area of Si-PM Q2phe Q3phe Q4phe Dynamic Range – is defined by fine structure of SiPM ( and correspond 1500 photoelectrons) 8 Dec 2005 Valeri Saveliev

SiPM Performance Intrinsic Resolution Q1phe Q2phe P Q3phe Q4phe Q5phe Q6phe Full Size SiPM – 1440 cells ( 20x30 microns) The Intrinsic Resolution of SiPM is very High (for 100 phe ~ few %) 8 Dec 2005 Valeri Saveliev