Monte-Carlo based performance assessment of ASACUSA’s antihydrogen detector

• DOI: 10.1016/j.nima.2018.09.013
• Publication Date: 2018-09-09T13:49:56Z
• Authors: Y. Nagata; N. Kuroda; B. Kolbinger; M. Fleck; C. Malbrunot; V. Mäckel; C. Sauerzopf; M.C. Simon; M. Tajima; J. Zmeskal; H. Breuker; H. Higaki; Y. Kanai; Y. Matsuda; S. Ulmer; L. Venturelli; E. Widmann; Y. Yamazaki
• Keywords: Hodoscope; Antihydrogen; Particle identification

An antihydrogen detector consisting of a thin BGO disk and surrounding plastic scintillator hodoscope has been developed. We have characterized the two-dimensional positions sensitivity energy deposition into was calibrated using cosmic rays by comparing experimental data with Monte-Carlo simulations. The particle tracks were defined connecting hit hits on bars. event rate investigated as function angles between in for simulated antiproton events, measured ray events. Identification Monte Carlo events performed deposited tracks. background limited to 12 mHz detection efficiency 81 %. signal-to-noise ratio improved from 0.22 s^{-1/2} obtained 2012 0.26 this work.