Speaker
Description
The CRAB (Calibrated nuclear Recoils for Accurate Bolometry) experiment uses neutron capture to study the sub-keV nuclear recoil response of cryogenic detectors with high precision, a key ingredient for the interpretation of CEνNS measurements and dark-matter searches.
After the successful validation of the method, demonstrated by the detection of a 112 eV recoil peak in a CaWO₄ cryogenic detector exposed to a commercial neutron source, an innovative experimental setup has been installed and commissioned at the TRIGA Mark-II reactor at the Atominstitut in Vienna, where the cryostat is combined with a low-intensity thermal neutron beam and gamma detectors.
In this poster, I will present new results obtained with CaWO₄ and Al₂O₃ detectors, demonstrating that the nuclear recoil energy scale can be determined with better than percent-level accuracy in the few-hundred-eV range. I will also outline prospects for a precision comparison with the electronic recoil response, as well as the extension of this program to additional target materials such as Ge and Si.