Theoretical study and experimental result of the RF coupler prototypes of Spiral2
Résumé
Spiral2 is a 40 MeV-5mA deuterons and a 14.5 MeV/u-1mA heavy ions superconducting linac under construction at GANIL. The RF couplers have to provide 12 kW CW power to the cavities at 88 MHz for an accelerating field of 6.5 MV/m. Two solutions corresponding to two different technologies have been designed and two prototypes have been built. We present the technical proposals ans issues as well as the results (manufacturing, test at low and high power, multipacting...) leading to the final choice.
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