Author: Scarpa, F.
Paper Title Page
TUPB094 High Power Tests of TRASCO RFQ Couplers 681
  • E. Fagotti, L. Antoniazzi, F. Grespan, A. Palmieri, F. Scarpa
    INFN/LNL, Legnaro (PD), Italy
  • O. Brunasso Cattarello, R. Panero
    INFN-Torino, Torino, Italy
  • M. Desmons
    CEA/DSM/IRFU, France
  The 352.2 MHz 7.13 m long TRASCO RFQ requires an overall amount of 900 kW CW RF power in order to deliver the 40 mA proton beam from the initial energy of 80 keV to the final energy of 5 MeV. For such a purpose a system of eight compact (ϕext=38 mm, ϕint=19.4 mm) loop-based couplers was designed. In a first phase, only the first two (out of six) modules of the RFQ were tested at full power. Therefore only two (out of eight) couplers were used. In order to completely characterize these couplers, a dedicated test bench was prepared, consisting of a bridge waveguide and diagnostics (reflected power, vacuum, arc detectors etc.), onto which a couple of couplers was connected for transmission measurements. Each coupler was tested with a forward power of up to 140 kW. The description of the experimental setup and procedure, as well as the main results of the conditioning procedure will be reported in this paper.