Performance of fully instrumented detector planes of the forward calorimeter of a Linear Collider detector

TL;DR

This paper evaluates the performance of prototype detector planes for the forward calorimeter in a future linear collider, focusing on sensor response, noise, and shower shape analysis using beam tests and simulations.

Contribution

It presents the design, construction, and performance measurement of fully instrumented detector plane prototypes with silicon and GaAs sensors for forward calorimetry.

Findings

High signal-to-noise ratios achieved

Effective deconvolution method demonstrated

Good agreement between measured and simulated shower shapes

Abstract

Detector-plane prototypes of the very forward calorimetry of a future detector at an e+e- collider have been built and their performance was measured in an electron beam. The detector plane comprises silicon or GaAs pad sensors, dedicated front-end and ADC ASICs, and an FPGA for data concentration. Measurements of the signal-to-noise ratio and the response as a function of the position of the sensor are presented. A deconvolution method is successfully applied, and a comparison of the measured shower shape as a function of the absorber depth with a Monte-Carlo simulation is given.