# INSTR'20

24-28 February 2020
Budker Institute of Nuclear Physics
Asia/Novosibirsk timezone

## Study of the fast calorimeter prototype for modern 𝑒 +𝑒 − factories

Not scheduled
15m
Budker Institute of Nuclear Physics

#### Budker Institute of Nuclear Physics

11, akademika Lavrentieva prospect, Novosibirsk, Russia
Board: 23
Poster Calorimetry

### Speaker

Ms Ekaterina Prokhorova (Sergeevna)

### Description

Modern $e^{+} e^{-}$ factories with high luminosity require a fast response time of the detector subsystems to suppress severe beam background. The prototype of the electromagnetic calorimeter based on the counter with pure CsI crystal, novel wavelength shifter with nanostructured organosilicon luminophores and avalanche photodiodes Hamamatsu S8664-55 is discussed. The results of cosmic particle signals registration by such prototype will be reported.

### Summary

Modern $e^{+} e^{-}$ factories with high luminosity require fast response time of the detector subsystems to suppress severe beam background. Crystals of pure CsI (CsI(pure)), with a scintillation decay time of 30 ns, allow one to reduce substantially pileup noise in the electromagnetic calorimeter. We discuss the prototype of the electromagnetic calorimeter consisting of 16 counters. Each counter consists of CsI(pure) crystal (6 $\times$ 6 $\times$ 30 cm$^3$), wavelength shifter (WLS)
plate (6 $\times$ 6 $\times$ 0.8 cm$^3$) with the nanostructured organosilicon luminophores (NOL-9), four avalanche photodiodes (APD)
Hamamatsu S8664-55 and four-channel charge sensitive preamplifier, see Fig.~1(a). The optimization of the shape of the WLS plate has been carried out to improve the signal. The basic characteristics of all counter's components have been measured. The signals from the counters are processed by four four-channel shaper-ADC boards with the signal waveform sampling. The prototype is under the assembling procedure now, see Fig.~2.\
By the end of February, we plan to obtain the first result of cosmic particle registration by a prototype.

### Primary author

Ms Ekaterina Prokhorova (Sergeevna)

 Poster