Journal Article

First Tests of Li2WO4 Bolometric Detectors Using MMC Sensors for the Detection of CEνNS

Rodrigues, M., Vivier, M., Mauri, B., Nones, C., Loidl, M.

2023

Overview

Coherent elastic neutrino-nucleus scattering (CE ν NS), detected for the first time more than 40 years after its prediction, represents an experimental challenge because of its signature: a single nuclear recoil with energy in the range of 10 eV to a few 10’s keV on average. One of the main features of CE ν NS is its cross section, around two orders of magnitude higher compared with the inverse β decay. BASKET (Bolometers At Sub keV Energy Threshold) project aims at investigating cryogenic calorimeters for the CE ν NS detection, able to maintain the background level below the expected signature while being operated in above ground conditions in close vicinity to a nuclear reactor. The main requirements for such detectors are a low enough energy threshold of O(10 eV), and a fast signal rise time in the range of 0.1–1 ms to achieve good timing resolution and hence good mitigation of pile-up events. In this article, we report on the first tests of a prototype detector coupling a Li 2 WO 4 crystal to a magnetic metallic calorimeter (MMC) thermal sensor.

• Publisher: Springer US,Springer Nature B.V
• Subject: Bolometers / Characterization and Evaluation of Materials / Condensed Matter Physics / Detectors / Elastic scattering / Energy / Heat / Lithium / Magnetic Materials / Magnetism / Neutrinos / Neutrons / Nuclear power plants / Nuclear reactors / Physics / Physics and Astronomy / Sensors