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

2. 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

3. 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

4. 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

5. 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

6. 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

7. 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

8. 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

9. 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

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

11. 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

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

13. 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

14. 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

15. 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

16. 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