Performance study of SKIROC2/A ASIC for ILD Si-W ECAL

TL;DR

This paper evaluates the performance of the SKIROC2/A ASIC in the ILD Si-W ECAL, focusing on signal-to-noise ratio and TDC performance, comparing two versions of the ASIC to address issues in prototype detectors.

Contribution

It provides a detailed performance analysis of SKIROC2 and SKIROC2A ASICs for the ILD Si-W ECAL, highlighting improvements and issues in detector readout electronics.

Findings

SKIROC2A shows improved TDC performance over SKIROC2.

Signal-to-noise ratios are characterized for both ASIC versions.

Evaluation boards with different configurations were tested successfully.

Abstract

The ILD Si-W ECAL is a sampling calorimeter with tungsten absorber and highly segmented silicon layers for the International Large Detector (ILD), one of the two detector concepts for the International Linear Collider. SKIROC2 is an ASIC for the ILD Si-WECAL. To investigate the issues found in prototype detectors, we prepared dedicated ASIC evaluation boards with either BGA sockets or directly soldered SKIROC2. We report a performance study with the evaluation boards, including signal-to-noise ratio and TDC performance with comparing SKIROC2 and an updated version, SKIROC2A.