Electroluminescence Yield Measurements in Xenon Gas with the NEXT-DEMO++ Detector
physics.ins-det
/ Authors
NEXT Collaboration, J. Renner, J. D. Villamil, N. López-March, K. Mistry, P. Novella, A. Simón, V. Álvarez, J. M. Benlloch-Rodríguez, M. Cid
and 104 more authors
C. Cortes-Parra, R. Esteve, F. Kellerer, J. Martín-Albo, A. Martínez, G. Martínez-Lema, M. Martínez-Vara, M. Querol, P. Saharia, M. Sorel, S. Teruel-Pardo, H. Almazán, L. Arazi, I. J. Arnquist, F. Auria-Luna, S. Ayet, Y. Ayyad, C. D. R. Azevedo, F. Ballester, J. E. Barcelon, M. del Barrio-Torregrosa, F. I. G. M. Borges, A. Brodoline
/ Abstract
The NEXT-DEMO++ detector, a high-pressure xenon gas time projection chamber serving as a prototype for the NEXT-100 experiment, was used to measure the electroluminescence (EL) yield as a function of reduced electric field ($E/p$) across pressures from 2.0 to 9.4 bar, utilizing the 41.5 keV de-excitation peak of $^{83m}$Kr. These measurements were made to examine the pressure dependence of the slope of the reduced EL yield $Y/p$, which has shown inconsistencies in the literature. The reduced yield was fitted with a linear model, revealing a modest ($\sim$5%) change in slope, beginning around 5 bar and increasing with pressure up to 9.4 bar.