A FLUKA study towards predicting hadron-specific damage due to high-energy hadrons in inorganic crystals for calorimetry

Predicting hadron-specific damage from fast hadrons in crystals for calorimetry

Fast hadrons have been observed to cause a cumulative damage in Lead Tungstate and LYSO crystals. The underlying mechanism has been proven to be the creation of fission tracks, which act as scattering centres, thus reducing the light collection efficiency. For calorimetry applications in an environment where large, fast hadron fluences are anticipated, predictions about damage in crystals are of great importance for making an informed choice of technology. In the study presented here, simulations using the FLUKA package have been performed on Lead Tungstate, LYSO and Cerium Fluoride, and their…

通过色度量能法提升能量分辨率与粒子鉴别：概念验证研究

Enhancing Energy Resolution and Particle Identification via Chromatic Calorimetry: A Concept Validation Study

本研究通过堆叠不同发射波长的无机闪烁体验证色度量能法，利用电子和π介子（最高100 GeV）实现粒子鉴别与纵向簇射测量，提升能量分辨率。

Proof-of-principle of a new geometry for sampling calorimetry using inorganic scintillator plates

A novel geometry for a sampling calorimeter employing inorganic scintillators as an active medium is presented. To overcome the mechanical challenges of construction, an innovative light collection geometry has been pioneered, that minimises the complexity of construction. First test results are presented, demonstrating a successful signal extraction. The geometry consists of a sampling calorimeter with passive absorber layers interleaved with layers of an active medium made of inorganic scintillating crystals. Wavelength-shifting (WLS) fibres run along the four long, chamfered edges of the st…

A study of high-energy proton induced damage in Cerium Fluoride in comparison with measurements in Lead Tungstate calorimeter crystals

A Cerium Fluoride crystal produced during early R&D studies for calorimetry at the CERN Large Hadron Collider was exposed to a 24 GeV/c proton fluence Phi_p=(2.78 +- 0.20) x 10EE13 cm-2 and, after one year of measurements tracking its recovery, to a fluence Phi_p=(2.12 +- 0.15) x 10EE14 cm-2. Results on proton-induced damage to the crystal and its spontaneous recovery after both irradiations are presented here, along with some new, complementary data on proton-damage in Lead Tungstate. A comparison with FLUKA Monte Carlo simulation results is performed and a qualitative understanding of high-e…

Results on damage induced by high-energy protons in LYSO calorimeter crystals

Lutetium-Yttrium Orthosilicate doped with Cerium (LYSO:Ce), as a bright scintillating crystal, is a candidate for calorimetry applications in strong ionizing-radiation fields and large high-energy hadron fluences as are expected at the CERN Large Hadron Collider after the planned High-Luminosity upgrade. There, proton-proton collisions will produce fast hadron fluences up to ~5E14/cm^2 in the large-rapidity regions of the calorimeters. The performance of LYSO:Ce has been investigated, after exposure to different fluences of 24 GeV/c protons. Measured changes in optical transmission as a functi…

一种用于探测取向晶体中光产额增强的高性能定制光探测系统

A high-performance custom photodetection system to probe the light yield enhancement in oriented crystals

本文开发了一种基于 SiPM 的高性能定制光探测系统，用于直接测量 PWO 样品的闪烁光，验证了取向晶体中光产额增强效应，为未来更紧凑、高分辨率的电磁量能器设计提供了新概念。