# ROPPERI - A TPC readout with GEMs, pads and Timepix

## TL;DR

This paper introduces ROPPERI, a hybrid TPC readout combining GEMs, pads, and Timepix to achieve high granularity for improved particle detection and dE/dx measurements.

## Contribution

It presents a novel hybrid readout concept for TPCs integrating GEMs, pads, and a pixel chip, enhancing granularity and flexibility.

## Key findings

- High granularity enables electron cluster identification.
- Potential for improved dE/dx measurements.
- Progress towards proof-of-principle hardware and software.

## Abstract

The concept of a hybrid readout of a time projection chamber is presented. It combines a GEM-based amplification and a pad-based anode plane with a pixel chip as readout electronics. This way, a high granularity enabling to identify electron clusters from the primary ionisation is achieved as well as flexibility and large anode coverage. The benefits of this high granularity, in particular for dE/dx measurements, are outlined and the current software and hardware development status towards a proof-of-principle is given.