# SiW ECAL for future $e^+e^-$ collider

## TL;DR

This paper reports on the testing of a silicon-tungsten electromagnetic calorimeter prototype designed for future electron-positron colliders, highlighting its features and initial performance results from CERN tests.

## Contribution

It presents the first tests of a novel silicon-tungsten calorimeter prototype with detailed segmentation for future collider experiments.

## Key findings

- Prototype successfully tested at CERN SPS
- Segmentation into 1024 pixels demonstrated
- Initial performance metrics obtained

## Abstract

Calorimeters with silicon detectors have many unique features and are proposed for several world-leading experiments. We discuss the tests of the first three 18x18 cm$^2$ layers segmented into 1024 pixels of the technological prototype of the silicon-tungsten electromagnetic calorimeter for a future $e^+e^-$ collider. The tests have beem performed in November 2015 at CERN SPS beam line.