Ponente
Descripción
The X-ARAPUCA is an innovative photon detection device based on the use of a short pass dichroic filters with an appropriate cut-off wavelength, two wavelength shifters and an array of SiPM. This device was idealized and developed to detect liquid argon scintillation photons in large liquid argon time projection chambers (LArTPC). The scintillation light is produced in the vacuum ultraviolet VUV range, (127nm). Thanks to its high efficiency, especially for low energy events, the X-ARAPUCA was chosen as the baseline device for the photon detection system (PDS) of the DUNE (Deep Underground neutrino Experiment) far detectors and for integrating the PDS of SBND (Short Baseline Near Detector) experiment. In SBND, in addition to the standard X-ARAPUCAs for detecting VUV light, there is also a set of X-ARAPUCAs specifically developed to detect visible light, re-emitted by a thin film of TetraPhenyl Butadiene (TPB) deposited on the cathode of the LArTPC.
The measurement of the detection efficiency of VIS X-ARAPUCA, performed for the first time at UNICAMP, will be presented.
