Signal coupling to embedded pitch adapters in silicon sensors

TL;DR

This paper investigates how embedded pitch adapters in silicon sensors affect signal formation, revealing that they can cause inefficiencies in particle detection due to electric field alterations, supported by both simulation and beam test data.

Contribution

It provides the first combined simulation and experimental analysis of pitch adapter effects on signal formation in silicon microstrip sensors.

Findings

Pitch adapters alter electric fields inside sensors.

Signal formation is slowed near pitch adapters.

Detection inefficiency occurs in pitch adapter regions.

Abstract

We have examined the effects of embedded pitch adapters on signal formation in n-substrate silicon microstrip sensors with data from beam tests and simulation. According to simulation, the presence of the pitch adapter metal layer changes the electric field inside the sensor, resulting in slowed signal formation on the nearby strips and a pick-up effect on the pitch adapter. This can result in an inefficiency to detect particles passing through the pitch adapter region. All these effects have been observed in the beam test data.