Speaker
Description
The novel G-RWELL Micro Pattern Gaseous Detector (MPGD) is a hybrid configuration that combines two technologies - Gas Electron Multiplier (GEM) and μ-RWELL - to achieve gas gains above $10^4$. This makes it a cutting-edge solution for high-precision tracking applications.
The higher gas gain is reached thanks to the inclusion of a single GEM layer for signal pre-amplification, and it enables the use of MPGDs for efficent 2D tracking, supporting a wide range of applications. This technology has been chosen for the ePIC Endcap Trackers to be developed for the Electron-Ion Collider (EIC) at Brookhaven National Laboratory. The Endcap Trackers consist of two pairs of G-RWELL disks, positioned in both the leptonic and the hadronic regions.
The design includes a drift gap of $3−6$ mm and a transfer gap of $2−3$ mm, while a 2D strip “COMPASS-like” readout with a $600$ μm pitch ensures a spatial resolution better than $150$ μm, even for curved tracks. This guarantees full compatibility with the operational requirements of the ePIC experiment.
This contribution highlights the innovative G-RWELL technology and its integration into the ePIC tracking system, demonstrating its potential to enhance detector performance in state-of-the-art nuclear physics experiments. Results from a recent test beam campaign (conducted in November 2024 at the PS-T10 East Area at CERN) have been obtained on the spatial resolution and detection efficiency. Prototypes of 10x10 cm$^2$ were tested for varying angles of incidence between the beam and the detector surface, prooving the high quality of this novel technology performances. The design of full scale quadrants of 50 cm radius are being designed.
