Performance of $\text{BDX-MINI}$ veto systems

Spreafico, M.; Battaglieri, M.; Bondí, M.; Celentano, A.; Cole, P. L.; De Napoli, M.; De Vita, R.; Marsicano, L.; Randazzo, N.; Smith, E. S.; Snowden-Ifft, D.; Wood, M.

doi:10.1016/j.nima.2022.167949

DOE OSTI · 1922905

Performance of $\text{BDX-MINI}$ veto systems

Spreafico, M.·Battaglieri, M.·Bondí, M.·Celentano, A.·Cole, P. L.·De Napoli, M.·De Vita, R.·Marsicano, L.·Randazzo, N.·Smith, E. S.·Snowden-Ifft, D.·Wood, M.

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Abstract

Here this paper describes the veto system of the BDX-MINI detector installed at Jefferson Lab (US). The BDX-MINI experiment is the first electron beam-dump experiment specifically designed to search for Light Dark Matter (LDM) particles in the MeV-GeV mass range. The core of the BDX-MINI detector is a lead-tungstate electromagnetic calorimeter, for a total volume of 4 dm 3 . The calorimeter is surrounded by a multi-layer veto aimed at rejecting cosmic background: the innermost layer of the veto is made by a passive tungsten shielding for low energy radiation, while plastic scintillators make the middle and outer layers for charged cosmic particles rejection. Being located about 20 m downstream, the dirt between the beam dump and the detector provides sufficient shielding from the beam-related background. In 2019–2020, BDX-MINI was exposed for about six months to weakly interacting particles (neutrinos and, if existing, DM) produced by a 2.176 GeV electron beam incident on the beam dump of experimental Hall-A at Jefferson Lab.

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Spreafico, M., Battaglieri, M., Bondí, M., Celentano, A., Cole, P. L., De Napoli, M., De Vita, R., Marsicano, L., Randazzo, N., Smith, E. S., Snowden-Ifft, D., Wood, M.. 2022-12-19. Performance of $\text{BDX-MINI}$ veto systems. https://doi.org/10.1016/j.nima.2022.167949

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