IAP, Frankfurt am Main
There is an increasing interest world wide in proton and ion linear accelerators for the low and medium energy range. Many of these accelerators will be operated at high duty cycles up to 100%. Superconducting cavities are favourable or sometimes even technologically necessary. Using conventional low beta cavities (quarter wave, half wave) leads to a large number of cavities and sub-systems because of the small number of accelerating cells per cavity. The recently developed superconducting CH-cavity is the first multi-cell cavity for low beta applications. A prototype cavity (19 cells, beta=0.1) has been tested with effective gradiends of 7 MV/m. Presently two optimized CH-cavities are under construction (beta=0.15, 325 MHz, 7-cell and beta=0.059, 217 MHz, 15 cells). Both cavities will be fully equipped with cryo-module, tuning systems and high power couplers. It is planned to test both cavities with beam at GSI, Darmstadt. The talk covers the development of the superconducting CH-cavity, different applications and fututre plans.
