Refractive index in the JUNO liquid scintillator

Articolo

Data di Pubblicazione:

2024

Citazione:

Refractive index in the JUNO liquid scintillator / H.S. Zhang, M. Beretta, S. Cialdi, C.X. Yang, J.H. Huang, F. Ferraro, G.F. Cao, G. Reina, Z.Y. Deng, E. Suerra, S. Altilia, V. Antonelli, D. Basilico, A. Brigatti, B. Caccianiga, M.G. Giammarchi, C. Landini, P. Lombardi, L. Miramonti, E. Percalli, G. Ranucci, A.C. Re, P. Saggese, M.D.C. Torri, S. Aiello, G. Andronico, A. Barresi, A. Bergnoli, M. Borghesi, R. Brugnera, R. Bruno, A. Budano, A. Cammi, V. Cerrone, R. Caruso, D. Chiesa, C. Clementi, S. Dusini, A. Fabbri, G. Felici, A. Garfagnini, N. Giudice, A. Gavrikov, M. Grassi, R.M. Guizzetti, N. Guardone, B. Jelmini, L. Lastrucci, I. Lippi, L. Loi, C. Lombardo, F. Mantovani, S.M. Mari, A. Martini, M. Montuschi, M. Nastasi, D. Orestano, F. Ortica, A. Paoloni, F. Petrucci, E. Previtali, M. Redchuck, B. Ricci, A. Romani, G. Sava, A. Serafini, C. Sirignano, M. Sisti, L. Stanco, E.S. Farilla, V. Strati, A. Triossi, C. Tuve', C. Venettacci, G. Verde, L. Votano. - In: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT. - ISSN 0168-9002. - 1068:(2024 Nov), pp. 169730.1-169730.6. [10.1016/j.nima.2024.169730]

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 to cover wide range of refractive index (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.

Tipologia IRIS:

01 - Articolo su periodico

Keywords:

Cherenkov light; JUNO experiment; Linear alkyl benzene; Neutrino physics; Refractive index; Scintillator

Elenco autori: