Proton RFQ Accelerator with High Duty Cycle

The radio frequency quadrupole accelerator concept uses rf fields for acceleration and focussing of low energy beams. The RFQ offers attractive features as the acceptance of a dc beam directly from the ion source and acceleration of intense beams with large space charge forces. Our zero-mode resonator design offers several advantageous properties, as simple construction, good rf behaviour and the possibility of very high duty cycle operation. A prototype proton accelerator for 10 - 360 keV (108.5 MHz) has been built and the status of this project will be reported.