Status of the RICOCHET experiment at the ILL

The RICOCHET experiment aims to measure the coherent elastic neutrino-nucleus scattering induced by the antineutrinos produced by the research nuclear reactor of the Institut Laue-Langevin (ILL) in Grenoble, France. The RICOCHET Collaboration uses an array of 42-g germanium cryogenic calorimeters capable of reading out both ionization and phonon signals. Two types of calorimeters (planar and FID) are employed, which differ by their electrode design. In this contribution, the RICOCHET experiment and the performance achieved during its first commissioning phases are presented. The baseline energy resolution and the rate of background nuclear recoils (NR) between 2 and 7 keV are reported for planar detectors. The NR rate induced by cosmogenic muons is measured using events in coincidence with the muon veto with the reactor OFF and is shown to be consistent with the GEANT4 simulations. For events in anti-coincidence with the muon veto, as the sensitivity of the measurement is limited by the contamination from surface events, only upper limits are reported both with the reactor ON and OFF. The latest part of this contribution focuses on preliminary results obtained during the following commissioning phase with the first FID detectors operated in RICOCHET. These detectors offer the capability to identify surface events, and comparison with the event distributions for planar detectors suggests an improved sensitivity of FID detectors to nuclear recoils with respect to planar detectors.