2003/10/31 by L. Oberauer, C. Grieb, F. von Feilitzsch +1 · 27 citations
Physics and Astronomy · #Borexino #Dark Matter and Cosmic Phenomena #Neutrino #Neutrino Physics Research #Neutrino oscillation #Nuclear physics #Particle Detector Development and Performance #Physics #Solar neutrino #physics.ins-det
paper · pdf · doi:10.1016/j.nima.2004.05.095
published in Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment 530(3), 453-462 (Elsevier BV) · submitted to Nuclear Instruments and Methods in Physics Research
arxiv created 2004/05/14 · openalex publication_date 2004/06/22 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Light concentrators for the solar neutrino experiment Borexino and the Counting Test Facility (CTF) have been developed and constructed. They increase the light yield of these detectors by a factor of 2.5 and 8.8, respectively. Technical challenges like long term stability in various media, high reflectivity and radiopurity have been addressed and the concepts to overcome these difficulties will be described. Gamma spectroscopy measurements of the concentrators show an upper limit of 12e-6 Bq/g for uranium and a value of 120e-6 Bq/g for thorium. Upper limits on other possible contaminations like 26Al are presented. The impact of these results on the performance of Borexino and the CTF are discussed and it is shown that the design goals of both experiments are fulfilled.