Fyzikální ústav Akademie věd ČR

The project is intended to develop and test a new type of hadron calorimeter which will constitute detector on planed International Linear Collider (ILC). The required properties are high density, hermeticity and very high granularity to separate different particle in jets.

In hadron calorimeter as a active medium scintillating tiles of size 3x3x0,5 cm³ are used. The absorber consists of 2cm thick stainless steel plates. The scintillation light signal are lead by wave-shift fibres to silicon photomultiplier (SiPM or MPPC) with photocathode of 1mm² size. Due to small size the photo-detectors and wave-shift fibres are located directly in scintillating tiles and digitizing electronic is inserted in free space between the active medium and the absorber. This concept allows to construct very compact calorimeter with high resolution of jet energy (together with track detector the expected resolution is about 30%/√(E [GeV]) )

Our group deals with development and production of calibration system for silicon photomultipliers. The calibration light is generated by LED drived by dedicated electronic board and distributed into several tiles by one optical fibre. The LED driver allows to produce light pulses of duration of 5-10 ns with controllable amplitude. Finally we are interested in data analyses from test runs with various beams