Speaker
Description
In the present work, an alternative route to grow Nb3Sn film for SRF application is presented. Liquid tin diffusion is an established technology for wire fabrication, already explored in the past at LNL for SRF application.
The deposition process has been completely revised, adopting sample pre-anodization to enhance the Nb3Sn nucleation from the tin vapor diffusion and introducing a double annealing process. The new deposition procedure solves the tin droplet problem that normally afflicts liquid tin diffusion. XRD shows a single Nb3Sn phase, without the presence of spurious phases as in the old process. Evaluation of SRF properties in 6 GHz cavities are ongoing. Moreover, the process has been adapted to axion cavities and behavior of Nb3Sn in static high magnetic field, for dark matter application, will be tested as well.
