TY  - JOUR
AU  - NEXT Collaboration (Mistry, K. et al
AU  - Carcel, S.
AU  - Lopez-March, N.
AU  - Martin-Albo, J.
AU  - Novella, P.
AU  - Querol, M.
AU  - Romo-Luque, C.
AU  - Sorel, M.
AU  - Soto-Oton, J.
AU  - Uson, A.
PY  - 2024
DA  - 2024//
TI  - Design, characterization and installation of the NEXT-100 cathode and electroluminescence regions
T2  - J. Instrum.
JO  - Journal of Instrumentation
SP  - P02007 - 36pp
VL  - 19
IS  - 2
PB  - IOP Publishing Ltd
KW  - Detector design and construction technologies and materials
KW  - Double-beta decay detectors
KW  - Charge transport
KW  - multiplication and electroluminescence in rare gases and liquids
KW  - Time projection Chambers (TPC)
AB  - NEXT -100 is currently being constructed at the Laboratorio Subterraneo de Canfranc in the Spanish Pyrenees and will search for neutrinoless double beta decay using a high-pressure gaseous time projection chamber (TPC) with 100 kg of xenon. Charge amplification is carried out via electroluminescence (EL) which is the process of accelerating electrons in a high electric field region causing secondary scintillation of the medium proportional to the initial charge. The NEXT -100 EL and cathode regions are made from tensioned hexagonal meshes of 1 m diameter. This paper describes the design, characterization, and installation of these parts for NEXT -100. Simulations of the electric field are performed to model the drift and amplification of ionization electrons produced in the detector under various EL region alignments and rotations. Measurements of the electrostatic breakdown voltage in air characterize performance under high voltage conditions and identify breakdown points. The electrostatic deflection of the mesh is quantified and fit to a first -pr inciples mechanical model. Measurements were performed with both a standalone test EL region and with the NEXT-100 EL region before its installation in the detector. Finally, we describe the parts as installed in NEXT-100, following their deployment in Summer 2023.
SN  - 1748-0221
UR  - https://arxiv.org/abs/2311.03528
UR  - https://doi.org/10.1088/1748-0221/19/02/P02007
DO  - 10.1088/1748-0221/19/02/P02007
LA  - English
N1  - WOS:001185791500003
ID  - NEXTCollaborationMistry_etal2024
ER  -