# Performance of ANAIS-112 experiment after the first year of data taking

## TL;DR

The ANAIS-112 experiment, using NaI(Tl) detectors at Canfranc, reports on its first-year performance, aiming to verify DAMA/LIBRA's dark matter modulation signal with 105.32 kg x yr exposure.

## Contribution

This paper presents the first-year detector performance and operational results of the ANAIS-112 experiment, a new effort to confirm the DAMA/LIBRA dark matter modulation signal.

## Key findings

- Total live time of 341.72 days achieved
- Exposure of 105.32 kg x yr accumulated
- Initial detector performance meets experimental goals

## Abstract

ANAIS is a direct detection dark matter experiment aiming at the study of the annual modulation expected in the interaction rate. It uses same target and technique than DAMA/LIBRA experiment, which reported a highly significant positive modulation compatible with that expected for dark matter particles distributed in the galactic halo. However, other very sensitive experiments do not find any hint of particles with the required properties, although comparison is model dependent. In 2017, ANAIS-112 experiment was installed at the Canfranc Underground Laboratory (LSC), in Spain, and after the commissioning run for calibration and general assessment, ANAIS-112 started data taking in dark matter mode on August 3$^{rd}$, 2017. It consists of nine NaI(Tl) modules, amounting 112.5 kg of mass in total. ANAIS-112 will be able to test the DAMA/LIBRA result with the achieved background and threshold at three sigma level in five years of data taking. Here we report on the experimental apparatus and detector performance after the first year of data taking. Total live time available amounts to 341.72 days, being the corresponding exposure 105.32 kg x yr.