First seamless copper 1.3GHz cavity produced as substrate for the coating of the SC film

This Report is related to achieving I.FAST Milestone 38 (First seamless copper 1.3GHz cavity produced as substrate for the coating of the SC film).

The accelerating cavities used in this project will be of the elliptical seamless type made with spinning technology, developed by Enzo Palmieri.

INFN, in collaboration with Piccoli Srl, aims to improve the quality of production, in particular the reproducibility, by using numerically controlled machines instead of traditional semi-automatic lathes used up to now. Efforts are also being made to reduce surface defects by studying the effect of annealing temperature and evaluate new strategies for reducing cold work stress.

This report presents the results obtained in the development phase of the 1.3 GHz elliptical seamless cavity manufacturing technology and the realization of the first seamless cavity obtained with a CNC lathe and which will be used as a substrate  for the coating of superconducting films.

Thus, the I.FAST Milestone 38 has been achieved.