First Tests of the Superconducting CH-Structure

The CH-or Crossbar H-structure is a new H-mode drift-tube structure operating in the TE
210
mode. Due to its mechanical rigidity room temperature as well as superconducting cavities can be realized [1]. A superconducting version of the CH-structure has been development at the IAP in Frankfurt, Germany. To prove the promising results optained by simulations a 19-cell, 352 MHz (β = 0.1) prototype cavity has been designed and built. This CH prototype is the first superconducting low energy multi-cell cavity for the acceleration of protons and ions. The cavity has been tested at room temperature with an rf power of up to 300 W cw and 2 kW pulsed. We present the first tests of the cavity as well as mechanical simulations.