Fiber and Crystals Dual Readout calorimeters

TL;DR

This paper reports on R&D of dual readout calorimeters using Cherenkov and scintillation signals to improve hadronic energy resolution, including tests on fiber and crystal prototypes and discussions on construction techniques.

Contribution

It introduces novel dual readout calorimeter prototypes with fiber and crystal media, demonstrating improved energy resolution and particle identification capabilities.

Findings

Fiber prototypes achieved high energy resolution for electrons and pions.

Crystal-based dual readout detectors show promising properties for homogeneous media.

Construction techniques for scalable calorimeter prototypes are discussed.

Abstract

The RD52 (DREAM) collaboration is performing R\&D on dual readout calorimetry techniques with the aim of improving hadronic energy resolution for future high energy physics experiments. The simultaneous detection of Cherenkov and scintillation light enables us to measure the electromagnetic fraction of hadron shower event-by-event. As a result, we could eliminate the main fluctuation which prevented from achieving precision energy measurement for hadrons. We have tested the performance of the lead and copper fiber prototypes calorimeters with various energies of electromagnetic particles and hadrons. During the beam test, we investigated the energy resolutions for electrons and pions as well as the identification of those particles in a longitudinally unsegmented calorimeter. Measurements were also performed on pure and doped PbWO$_{4}$ crystals, as well as BGO and BSO, with the aim of realising a crystal based dual readout detector. We will describe our results, focusing on the more promising properties of homogeneous media for the technique. Guidelines for additional developments on crystals will be also given. Finally we discuss the construction techniques that we have used to assemble our prototypes and give an overview of the ones that could be industrialized for the construction of a full hermetic calorimeter.