New results from the technological prototype of the CALICE highly-granular silicon tungsten electromagnetic calorimeter

TL;DR

This paper reports on the testing and initial results of an extended prototype of the CALICE silicon-tungsten electromagnetic calorimeter, focusing on performance evaluation and preliminary data analysis from beam tests.

Contribution

It presents new results from an upgraded CALICE ECAL prototype with enhanced design and a novel DAQ system, including detailed performance metrics and initial shower data analysis.

Findings

Noise and self-trigger performance characterized

Response to punch-through electrons evaluated

Preliminary analysis of low-energy electron showers

Abstract

An extended version of the CALICE silicon-tungsten ECAL was tested in November 2021 at the DESY beam test facility. With 15 active layers, it featured some with a thin PCB design, and a new compact DAQ system handling all layers in a common set. The noise, self-trigger performances and response to punch-though electrons, without tungsten absorbers, have been evaluated for each of the 15360 channels, using an improved procedure. Showers of low-energy electrons (1 to 6 GeV) have been recorded in two configurations of absorber, and are being analysed. Some preliminary results at the cell level will be presented.