Refractive index in the JUNO liquid scintillator
Abstract
In the field of rare event physics, it is common to have huge masses of organic liquid scintillator as detection medium. In particular, they are widely used to study neutrino properties or astrophysical neutrinos. Thanks to its safety properties (such as low toxicity and high flash point) and easy scalability, linear alkyl benzene is the most common solvent used to produce liquid scintillators for large mass experiments. The knowledge of the refractive index is a pivotal point to understand the detector response, as this quantity (and its wavelength dependence) affects the Cherenkov radiation and photon propagation in the medium. In this paper, we report the measurement of the refractive index of the JUNO liquid scintillator between 260-1064 nm performed with two different methods (an ellipsometer and a refractometer), with a sub percent level precision. In addition, we used an interferometer to measure the group velocity in the JUNO liquid scintillator and verify the expected value derived from the refractive index measurements.
Cite
@article{arxiv.2405.19879,
title = {Refractive index in the JUNO liquid scintillator},
author = {H. S. Zhang and M. Beretta and S. Cialdi and C. X. Yang and J. H. Huang and F. Ferraro and G. F. Cao and G. Reina and Z. Y. Deng and E. Suerra and S. Altilia and V. Antonelli and D. Basilico and A. Brigatti and B. Caccianiga and M. G. Giammarchi and C. Landini and P. Lombardi and L. Miramonti and E. Percalli and G. Ranucci and A. C. Re and P. Saggese and M. D. C. Torri and S. Aiello and G. Andronico and A. Barresi and A. Bergnoli and M. Borghesi and R. Brugnera and R. Bruno and A. Budano and A. Cammi and V. Cerrone and R. Caruso and D. Chiesa and C. Clementi and S. Dusini and A. Fabbri and G. Felici and A. Garfagnini and N. Giudice and A. Gavrikov and M. Grassi and R. M. Guizzetti and N. Guardone and B. Jelmini and L. Lastrucci and I. Lippi and L. Loi and C. Lombardo and F. Mantovani and S. M. Mari and A. Martini and M. Montuschi and M. Nastasi and D. Orestano and F. Ortica and A. Paoloni and F. Petrucci and E. Previtali and M. Redchuck and B. Ricci and A. Romani and G. Sava and A. Serafini and C. Sirignano and M. Sisti and L. Stanco and E. Stanescu Farilla and V. Strati and A. Triossi and C. Tuvé and C. Venettacci and G. Verde and L. Votano},
journal= {arXiv preprint arXiv:2405.19879},
year = {2024}
}
Comments
6 pages, 9 figures