Status Report: A Detector for Measuring the Ground State Hyperfine Splitting of Antihydrogen

TL;DR

This paper reports on a specialized detector developed by the ASACUSA collaboration at CERN to measure the hyperfine structure of antihydrogen, focusing on its ability to distinguish signal from background events.

Contribution

The paper introduces a novel tracking detector designed specifically for antihydrogen detection in hyperfine splitting experiments at CERN.

Findings

Successful discrimination between background and antihydrogen events

Enhanced detection efficiency for antihydrogen atoms

Improved accuracy in hyperfine structure measurement

Abstract

The ASACUSA (Atomic Spectroscopy And Collisions Using Slow Antiprotons) collaboration at the Antiproton Decelerator at CERN aims to measure the ground state hyperfine structure of antihydrogen. A Rabi-like spectrometer line has been built for this purpose. A detector for counting antihydrogen is located at the end of the beam line. This contribution will focus on the tracking detector, whose challenging task it is to discriminate between background events and antiproton annihilations originating from antihydrogen atoms which are produced only in small amounts.