The CALICE SiW ECAL Technological Prototype -- Status and Outlook

TL;DR

This paper reports on the development, commissioning, and beam testing of a highly granular silicon-tungsten electromagnetic calorimeter prototype designed for future collider detectors utilizing Particle Flow Algorithms.

Contribution

It presents the design, technical developments, and test results of a 15-layer silicon-tungsten ECAL prototype with over 15,000 readout cells, advancing calorimeter technology.

Findings

Successful beam tests at DESY, CERN, and SPS.

Validation of high granularity for improved imaging.

Technical feasibility of large-scale silicon-tungsten ECALs.

Abstract

The next generation of collider detectors will make full use of Particle Flow Algorithms, requiring high-precision tracking and full imaging calorimeters. The latter, thanks to granularity improvements by two to three orders of magnitude compared to existing devices, have been developed during the past 15 years by the CALICE collaboration and are now reaching maturity. This contribution will focus on the commissioning of a 15-layer prototype of a highly granular silicon-tungsten electromagnetic calorimeter that comprises 15,360 readout cells. The prototype was exposed in November 2021 and March 2022 to beam tests at DESY and in June 2022 to a beam test at the SPS at CERN. The test at CERN has been carried out in combination with the CALICE Analogue Hadron Calorimeter. The contribution will give a general overview of the prototype and will highlight technical developments necessary for its construction.