Seminario del Máster en Física: Radiaciones, Nanotecnología, Partículas y Astrofísica, impartido por Ariel Tarifeño Saldivia, Institut de Tècniques Energètiques (INTE), Universitat Politècnica de Catalunya (UPC), Barcelona.
Resumen: Neutrons in underground facilities are a limiting factor in many rare event experiments, such as the search of dark matter or neutrinos, because of the large penetrability of neutrons and their potential to induce background signals in the detection system. Therefore, the precise characterization of the ambient neutron in underground facilities is desired in order to provide constrains to the background affecting different experiment. On the other hand, Cosmic rays colliding with atom’s nuclei in the atmosphere are the main source of ambient neutrons at high altitudes or ground. The study of these neutrons is connected with different fields, such as the physics of cosmic rays, space weather, environmental radioactivity and single-event upsets (SEUs) in microelectronics. In this work, the High Efficiency Neutron Spectrometry Array (HENSA) is introduced. The HENSA detector is based on the Bonner’s spheres principle. HENSA consists of an array of ten 3He-filled tubes, each one embedded in different materials including high density polyethylene moderators, cadmium shieldings and lead neutron converters. The system has a neutron sensitivity, from thermal up to GeV’s, which is around 10x higher than conventional Bonner’s spheres neutron spectrometers. Currently, HENSA is being used for the experimental measurements at: i) the Canfranc underground laboratory (LSC), ii) the mapping of the cosmic ray induced neutron background along the Spanish territory during the minimum of the solar activity. Preliminary results of these campaigns are presented and future perspectives are discussed.
- Fecha: Martes 23 de noviembre de 2021
- Lugar: aula A13 de la Facultad de Ciencias
- Horario: de 10:00h a 12:00h.
- Organiza: Máster en Física: Radiaciones, Nanotecnología, Partículas y Astrofísica
- Más información: https://masteres.ugr.es/fisica/docencia/seminarios