Ponente
Descripción
The adhesion of the p-terphenyl film to the substrate used in the X-ARAPUCA dichroic filter is directly correlated to the long-term efficiency of this device. Six different cleaning methods were established before deposition with the intention of analyzing their contributions to the adhesion process of the film to the substrate. Three distinct techniques were used in the adhesion tests. The first consisted of an ultrasonic bath at different durations with verification of the residual mass of the substrate+film set, following an adaptation of the tape test, used in the qualitative adherence evaluation of the coating to the substrate. The second technique used was scratching by sclerometry, or “scratch test”, which consists in scratching the film with a progressive load, determining the maximum value of load supported by the film before it breaks. Finalizing the tests with the cryogenic immersion with turbulence method, since these devices will be submerged in liquid argon in the DUNE experiment. Preliminary results are in the final treatment and analysis, with a strong indication of priority given to some cleaning methods in favoring the adhesion of the film to the filters.
