NON-DESTRUCTIVE INSPECTIONS FOR SC CAVITIES

Starting from the high-resolution camera for inspection of the cavity inner surface – so-called Kyoto Camera, high resolution T-map, X-map and eddy current scanner have been developed. R&D for radiography techniques is also going on to detect small voids inside the Nb EBW seam, where the target resolution is 0.1 mm. Some radiography tests with X-rays induced from an ultra short pulse intense laser were carried out. The local treatment technique on the found defects is also realized by the Micro-Grinder.