Signal Formation in a Detector with one Large Dimension

TL;DR

This paper develops a theoretical model for signal formation in long, cylindrical multi-conductor detectors, treating electromagnetic wave propagation along the detector's length within a TEM approximation, applicable to various long microstrip detectors.

Contribution

It introduces a transmission line model for long multi-conductor detectors, extending existing small detector theories to account for wave propagation along the large dimension.

Findings

Electromagnetic wave propagation along the detector's length is significant.

The model applies to long detectors like MDTs and microstrip detectors.

Propagation effects can be ignored transversely in certain configurations.

Abstract

We present the theory for the signal formation in a multi conductor detector with cylindrical geometry and long length. There exists electromagnetic wave propagation along the large dimension of the detector. The system is equivalent to a multi conductor transmission line. The treatment is in the TEM approximation. Each conductor is fed by its current source which is the same as in the case of small size detectors. A simple example is given for a long length Monitored Drift Tube (MDT). One could apply the result to a long micromegas-type detector or any long microstrip detector, ignoring propagation that is transverse to the strips.