Electromagnetic calorimeter of Belle II

被引：2

作者：

Kuzmin, A. ^{[1
]}

机构：

[1] RAS, Budker Inst Nucl Phys SB, Lavrentiev Ave 11, Novosibirsk 630090, Russia

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2020年 / 958卷

关键词：

Calorimeter; Detector; Electronics;

D O I：

10.1016/j.nima.2019.05.076

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The electromagnetic calorimeter of the Belle II detector and its performance in the first SuperKEKB run during 2018 are described. It is a high-granularity calorimeter based on 8736 CsI(Tl) scintillating crystals. The scintillation light is detected by PIN photodiodes. Each calorimeter electronics readout channel includes a charge sensitive preamplifier attached to the crystal and a 2 MHz flash ADC followed by a wave form analysis (WFA) realized in FPGA which provides both amplitude and time reconstruction. Usage of the WFA reduces a contribution of the pile-up noise. High time resolution provides the beam background suppression. In the Belle II experiment the calorimeter is used for particle energy measurement, particle identification as well as for the collider luminosity measurement, it also contributes to the first-level trigger.

引用

页数：4

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