A recoil detector for the measurement of antiproton-proton elastic scattering at angles close to 90$^{\circ}$

TL;DR

This paper details the design, construction, and testing of a recoil detector for precise measurement of antiproton-proton elastic scattering near 90 degrees, crucial for luminosity determination in high-energy physics experiments.

Contribution

It introduces a novel recoil detector specifically designed for accurate measurements at large scattering angles in antiproton-proton collisions.

Findings

The detector achieved excellent energy resolution.

Laboratory and beam tests confirmed proper performance.

Validation supports its use in the KOALA experiment at HESR.

Abstract

The design and construction of a recoil detector for the measurement of recoil protons of antiproton-proton elastic scattering at scattering angles close to 90$^{\circ}$ are described. The performance of the recoil detector has been tested in the laboratory with radioactive sources and at COSY with proton beams by measuring proton-proton elastic scattering. The results of laboratory tests and commissioning with beam are presented. Excellent energy resolution and proper working performance of the recoil detector validate the conceptual design of the KOALA experiment at HESR to provide the cross section data needed to achieve a precise luminosity determination at the PANDA experiment.