Design and simulation of the High-Energy Proton Beam Telescope

TL;DR

The paper presents the design, simulation, and preliminary testing of a high-resolution proton beam telescope based on MAPS, capable of precise characterization of silicon sensors for upcoming high-energy proton experiments.

Contribution

It introduces a novel high-energy proton beam telescope design with ultra-thin modules, integrated readout and DAQ systems, and validated performance through beam tests.

Findings

Achieved a simulated resolution of 1.83 micrometers for 1.6 GeV protons.

Demonstrated a single-module resolution of 5.77 micrometers with 1.3 GeV electrons.

Confirmed detection efficiency above 99.5% in tests.

Abstract

A high-resolution beam telescope is essential for the precise characterization of silicon pixel sensors. As part of the CSNS-II upgrade project, a High-Energy Proton Beam Telescope (HEPTel) based on monolithic active pixel sensors (MAPS) has been designed for the forthcoming High-Energy Proton Experimental Station (HPES), which will provide 0.8 to 1.6 GeV single-particle proton beams. HEPTel consists of six ultra-thin telescope modules, with a material budget per module of about 0.061% X0. Simulated with a 1.6 GeV proton beam, the telescope is expected to achieve a resolution of about 1.83 micrometers. Additionally, a dedicated readout electronics system and a Data Acquisition (DAQ) system have been designed for HEPTel, based on which a preliminary test system was established for beam tests. The beam test results with 1.3 GeV electrons demonstrated a single-module resolution of about 5.77 micrometers, an overall telescope resolution of about 2.70 micrometers, and a detection efficiency above 99.5%. These results validate the HEPTel design and confirm its capability for forthcoming proton-beam experiments at HPES.