Performance of TPC detector prototype integrated with UV laser tracks for the circular collider

TL;DR

This paper reports on a TPC detector prototype integrated with UV laser tracks designed for the CEPC, demonstrating promising resolution and performance metrics for future high-energy physics experiments.

Contribution

The study introduces a novel TPC prototype with integrated UV laser tracks and evaluates its performance, advancing detector technology for future colliders.

Findings

dE/dx resolution of 8.9% measured

Extrapolated CEPC resolution of 3.36%

Prototype demonstrates effective operation

Abstract

Several new experimental concepts in high-energy particle physics have been proposed in recent years. The physical goals include precisely measuring the properties of particles such as Higgs, Z and W, and even looking for signs of new physics at future colliders. To meet the evolving requirements for particle track detector, Time Projection Chamber(TPC) detector prototype integrated with a UV laser track system was developed for the main track detector at Circular Electron Positron Collider(CEPC). This prototype consists of 6 horizontal laser tracks around TPC detector chamber, a fast electronics readout of 1280 channels, a GEM detector with $200\times 200\,mm^2$ active area, and the DAQ system. The hit resolution, dE/dx resolution and drift velocity were studied by measuring and analyzing using the TPC prototype and UV laser tracks. The dE/dx resolution of the prototype was measured to be $(8.9\pm0.4)\,\%$. Extrapolating this to CEPC TPC with 220 layers and longer track, the resolution was estimated to be $(3.36\pm0.26)\,\%$. All results indicated that the TPC detector prototype integrated with UV laser tracks can work well.