The ANAIS experiment aims at the confirmation of the DAMA/LIBRA signal using the same target and technique at the Canfranc Underground Laboratory (LSC) in Spain. ANAIS detectors consist of large NaI crystals coupled to two photomultipliers (PMTs). In this work we present Single Electron Response (SER) data for several units of the Hamamatsu R12669SEL2 PMT model extracted from normal operation data of ANAIS underground prototypes and we compare them with PMT SER characterization previously done at surface lab before coupling them to NaI crystal. Moreover, total light collection for different ANAIS prototypes has been calculated, producing an excellent average result of 15 phe/keV, which has a good impact in both energy resolution and threshold.
@article{arxiv.1508.06152,
title = {Light Collection in the Prototypes of the ANAIS Dark Matter Project},
author = {Julio Amaré and Susana Cebrián and Clara Cuesta and Eduardo García and María Martínez and Miguel A. Oliván and Ysrael Ortigoza and Alfonso Ortíz de Solórzano and Carlos Pobes and Jorge Puimedón and María Luisa Sarsa and José Ángel Villar and Patricia Villar},
journal= {arXiv preprint arXiv:1508.06152},
year = {2015}
}
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Contributed to the 11th Patras Workshop on Axions, WIMPs and WISPs, Zaragoza, June 22 to 26, 2015