Bonn 2020 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 29: Instrumentation V

HK 29.2: Vortrag

Mittwoch, 1. April 2020, 14:30–14:45, J-HS C

Latest development of KoalaSoft for KOALA experiment — •Yong Zhou and Huagen Xu — Institute for Nuclear Physics (IKP), Forschungszentrum Jülich, Germany

The KOALA experiment will measure the antiproton-proton elastic scattering differential cross-section over a wide range of four-momentum transfer |t| from 0.0008 to 0.1 (GeV/c)2 at the upcoming HESR ring of FAIR. It aims to provide key input parameters for PANDA’s luminosity determination. KoalaSoft is the simulation software for KOALA experiment. It is developed based on FairRoot and combines the simulation, reconstruction and analysis tasks into one framework. Several new features are developed in KoalaSoft for the KOALA beam test experiment at COSY. First, a new type of FairSource based on raw binary data from the data acquisition system is implemented so that KoalaSoft can now decode the beam test data directly and streamline the analysis process smoothly. Second, all tasks are transformed into FairMQ-based tasks so that configuring the topology of KoalaSoft simulation job or analysis job is more convenient and flexible in a parallel environment. A new online program is also developed based on these new tasks. Finally, a more realistic digitization task of the recoil detector is developed in KoalaSoft to study the differences of event features between elastic scattering and other background reactions. Based on this study, an effective selection procedure for elastic scattering events has been developed and applied to the latest beam test data. All these new developments and a comparison between the simulation and the beam test result are presented in this talk.

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