Design and Fabrication of CLIC Test Structures

Abstract

Demonstration of an accelerating gradient of 100 MV/m at a breakdown rate of 10 is one of the key feasibility issues of the CLIC study. A high power RF test program both at X-band (SLAC and KEK) and 30 GHz (CERN) is under way to develop accelerating structures which reach this performance. The centrepiece of the testing program is the nominal CLIC accelerating structure [1], but also includes structures with different RF parameters, with and without wakefield damping waveguides and made with different fabrication technologies. The latter structures address as directly as possible the different aspects of the nominal CLIC structure. The design and objectives of the various Xband and 30 GHz test structures are presented and their fabrication methods and status are reviewed.