First tests of the full SIDDHARTA-2 experimental apparatus with a 4 He gaseous target

Abstract

In this paper, we present the first tests performed after the full installation of the SIDDHARTA-2 experimental apparatus on the Interaction Region of the DAΦNE collider at the INFN National Laboratories of Frascati. Before starting the first measurement of the kaonic deuterium 2p{\rightarrow}1s transition, accurate evaluation of the background rejection. mainly achieved with the Kaon Trigger system, was required. This run, performed in the period 04-26/05/2022 with a 4 He gaseous target, confirmed the 10^5 rejection factor obtained with a reduced version of the setup and different machine conditions in 2021. This important outcome motivated the filling of the target cell with deuterium and the starting of the measurement campaign of the kaonic deuterium 2p{\rightarrow}1s transition.

References in corpus (8)

• Test of a single module of the J-PET scanner based on plastic scintillators
• Positronium imaging with the novel multiphoton PET scanner
• Testing CPT symmetry in ortho-positronium decays with positronium annihilation tomography
• S-Wave Scattering of Fermion Revisited
• Measurements of the strong-interaction widths of the kaonic 3He and 4He 2p levels
• A new kaonic helium measurement in gas by SIDDHARTINO at the DAΦNE collider
• The SIDDHARTA-2 calibration method for high precision kaonic atoms X-ray spectroscopy measurements
• Kaonic Atoms at the DA$\Phi$NE Collider with the SIDDHARTA-2 Experiment