The Reconstruction Algorithm Study of 2D Interpolating Resistive Readout Structure

TL;DR

This study investigates the reconstruction algorithms for a 2D interpolating resistive readout structure with GEM detectors, combining simulation and prototype testing to optimize position determination and evaluate performance.

Contribution

It introduces new reconstruction methods for charge diffusion in resistive readouts and validates them through simulation and prototype experiments.

Findings

Charge diffusion process understood via simulation

Prototype achieves ~17% energy resolution

Readout structure supports up to 10^6 Hz event rate

Abstract

Systematic investigations including both simulation and prototype tests have been done about the interpolating resistive readout structure with GEM (Gaseous Electron Multiplier) detector. From the simulation, we have a good knowledge of the process of charges diffusion on the surface of the readout plane and develop several reconstruction methods to determine the hit position. The total signal duration time of a typical event with the readout structure is about several hundred nanoseconds, which implied an ideal count rate up to 106Hz. A stable worked prototype was designed and fabricated after the simulation. Using 55Fe 5.9keV X-Ray, the image performance of the prototype is examined with flat field image and some special geometry shapes, meanwhile, an energy resolution of about 17% is obtained.