The NEXT-100 Detector
Abstract
The NEXT collaboration is dedicated to the study of double beta decays of Xe using a high-pressure gas electroluminescent time projection chamber. This advanced technology combines exceptional energy resolution ( FWHM at the value of the neutrinoless double beta decay) and powerful topological event discrimination. Building on the achievements of the NEXT-White detector, the NEXT-100 detector started taking data at the Laboratorio Subterr\'aneo de Canfranc (LSC) in May of 2024. Designed to operate with xenon gas at 13.5 bar, NEXT-100 consists of a time projection chamber where the energy and the spatial pattern of the ionising particles in the detector are precisely retrieved using two sensor planes (one with photo-multiplier tubes and the other with silicon photo-multipliers). The detector has been operating at stable conditions using argon and xenon gases at 4 bar and drift fields of 74 V/cm and 118 V/cm, respectively. Alpha decays from the Rn chain have been used to test and monitor the stability of the detector, showing a constant electron lifetime in the drift volume. In this paper, in addition to reporting the results of the commissioning run, we provide a detailed description of the NEXT-100 detector, describe its assembly, and present the current estimation of the radiopurity budget.
Cite
@article{arxiv.2505.17848,
title = {The NEXT-100 Detector},
author = {NEXT Collaboration and C. Adams and H. Almazán and V. Álvarez and A. I. Aranburu and L. Arazi and I. J. Arnquist and F. Auria-Luna and S. Ayet and Y. Ayyad and C. D. R. Azevedo and K. Bailey and F. Ballester and J. E. Barcelon and M. del Barrio-Torregrosa and A. Bayo and J. M. Benlloch-Rodríguez and F. I. G. M. Borges and A. Brodoline and N. Byrnes and A. Castillo and E. Church and L. Cid and M. Cid and X. Cid and C. A. N. Conde and C. Cortes-Parra and F. P. Cossío and R. Coupe and E. Dey and P. Dietz and C. Echeverria and M. Elorza and R. Esteve and R. Felkai and L. M. P. Fernandes and P. Ferrario and F. W. Foss and Z. Freixa and J. García-Barrena and J. J. Gómez-Cadenas and J. W. R. Grocott and R. Guenette and J. Hauptman and C. A. O. Henriques and J. A. Hernando Morata and P. Herrero-Gómez and V. Herrero and C. Hervés Carrete and Y. Ifergan and A. F. B. Isabel and B. J. P. Jones and F. Kellerer and L. Larizgoitia and A. Larumbe and P. Lebrun and F. Lopez and N. López-March and R. Madigan and R. D. P. Mano and A. Marauri and A. P. Marques and J. Martín-Albo and A. Martínez and G. Martínez-Lema and M. Martínez-Vara and R. L. Miller and K. Mistry and J. Molina-Canteras and F. Monrabal and C. M. B. Monteiro and F. J. Mora and K. E. Navarro and P. Novella and D. R. Nygren and E. Oblak and I. Osborne and J. Palacio and B. Palmeiro and A. Para and I. Parmaksiz and A. Pazos and J. Pelegrin and M. Pérez Maneiro and M. Querol and J. Renner and I. Rivilla and C. Rogero and L. Rogers and B. Romeo and C. Romo-Luque and E. Ruiz-Chóliz and P. Saharia and F. P. Santos and J. M. F. dos Santos and M. Seemann and I. Shomroni and A. L. M. Silva and P. A. O. C. Silva and A. Simón and S. R. Soleti and M. Sorel and J. Soto-Oton and J. M. R. Teixeira and S. Teruel-Pardo and J. F. Toledo and C. Tonnelé and S. Torelli and J. Torrent and A. Trettin and P. R. G. Valle and M. Vanga and P. Vázquez Cabaleiro and J. F. C. A. Veloso and J. D. Villamil and J. Waiton and A. Yubero-Navarro},
journal= {arXiv preprint arXiv:2505.17848},
year = {2026}
}