Characterization of the SIDDHARTA-2 luminosity monitor

Abstract

A luminosity monitor, based on plastic scintillator detectors, has been developed for the SIDDHARTA-2 experiment aiming to perform high precision measurements of kaonic atoms and was installed in 2020 on the DAFNE $e^{+}{e}^{-}$ collider at LNF (Laboratori Nazionali di Frascati, INFN). The main goal of this system is to provide the~instantaneous and integrated luminosity of the DAFNE facility by measuring the rate of $K^{+}{K}^{-}$ correlated pairs emitted by the phi meson decay. This task requires an accurate timing of the DAQ signals, as well as timing resolution below 1ns, in order to disentangle the $K^{\pm }$ signals from the background minimum ionizing particles (MIPs) produced during the $e^{+}{e}^{-}$ collisions at DAFNE. In this paper the luminosity monitor concept as well as its laboratory characterization and the first results inside DAFNE are presented.

arXiv commentPublished in JINST

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• Measurements of high-n transitions in intermediate mass kaonic atoms by SIDDHARTA-2 at DA$\mathrm{\Phi }$NE
• Kaonic Atoms at the DA$\Phi$NE Collider with the SIDDHARTA-2 Experiment
• First measurement of kaonic helium-4 M-series transitions
• First Linearity and Stability Characterization for CZT Detection System in a e${}^{+}$e${}^{-}$ Collider Environment
• Time-based Selection of Kaonic Atom X-ray Events with Quasi-Hemispherical CZT Detectors at the DAFNE collider