EPJ Web Conf.
Volume 182, 20186th International Conference on New Frontiers in Physics (ICNFP 2017)
|Number of page(s)||8|
|Published online||03 August 2018|
Experimental technique for antiproton-nucleus annihilation cross section measurements at low energy
Max-Planck-Institut für Quantenoptik, D-85748 Garching, Germany
2 Dipartimento di Ingegneria dell'Informazione, Università degli Studi di Brescia, I-25123 Brescia, Italy
3 Istituto Nazionale di Fisica Nucleare - Pavia, I-27100 Pavia, Italy
4 Department of Physics, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
5 Dipartimento di Scienza e Alta Tecnologia, Università degli Studi dell'Insubria, I-22100 Como, Italy
6 Istituto Nazionale di Fisica Nucleare - Milano Bicocca, I-20126 Milano, Italy
7 Dipartimento di Ingegneria Meccanica e Industriale, Università degli Studi di Brescia, I-25123 Brescia, Italy
8 Istituto Nazionale di Fisica Nucleare - Trieste, I-34127 Trieste, Italy
a Now at Dipartimento di Scienza e Alta Tecnologia, Università degli Studi dell'Insubria, I-22100 Como, Italy and Istituto Nazionale di Fisica Nucleare - Milano Bicocca, I-20126 Milano, Italy
Published online: 3 August 2018
The interaction of very low energy antiprotons (ps) and antineutrons (ns) with nuclei is interesting for its influence on both fundamental cosmology and nuclear physics. Measuring the annihilation cross section of antimatter on matter can help in solving the universe matter-antimatter puzzle and could give relevant hints in the definition of strong interaction model parameters as well. The ASACUSA collaboration recently measured the antiproton-carbon annihilation cross section at 5.3 MeV of kinetic energy of the incoming antiproton. The experimental apparatus consisted in a vacuum chamber containing thin foils (~0.7-1 μm) of carbon crossed by a bunched beam of antiprotons from the CERN Antiproton Decelerator (AD). The fraction of antiprotons annihilating on the target nucleons gives origin to charged pions which can be detected and counted by segmented scintillators placed outside the chamber. This work describes the experimental details of the apparatus and the technique to perform the cross section measurements.
© The Authors, published by EDP Sciences 2018
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