LABORATORI NAZIONALI DEL SUD
B.Spataro - X-band accelerator structures: on going R&D at the LNF-INFN abstract The next generation of linear accelerators is highly demanding in terms of accelerating gradients. To upgrade performances of X band Linacs at 11.424 GHz many resources are devoted to achieve higher accelerating gradients and at the same time obtain the highest possible reliability. In the framework of a large collaboration among SLAC (USA), KEK (Japan) and INFN-LNF, our laboratories have been involved in the design, manufacture and test of short high power standing wave (SW) sections operating at 11.424 GHz. In particular, because electroforming is a very attractive technique to manufacture compact structures avoiding the soft brazing while maintaining mechanical properties and high vacuum requirements, recently an electroformed SW structure has been also realized and tested a room temperature. We report here the characterization of a hard high gradient RF accelerating structure at 11.424 GHz fabricated using the electroforming technique. Low-level RF measurements and high power RF tests carried out at the SLAC National Accelerator Laboratory are presented and discussed. In addition, based on the electroforming process we present also a possible layout where a water cooling of the irises has been considered for the first time. Among other R&D activities, characterization and tests of molybdenum coatings are in progress.

DATA: 20-03-2015