PROGRESS IN NORMAL CONDUCTING

Two Heavy Ion RFQsl-3 have been built for the UNILAC at GSI, a new high charge state injector (~I) and a prototype of a new high current injector (HSI). Both can be seen as branches of actual RFQ development. The HLI-FQ aeeelerates U28+ions from an ECR-ion source from 2.5 keV/u to 300 keV/u with a high duty cycle of now 25% at an operating frequency of 108.5 MHz. The Spiral-RFQ for the HSI accelerator accepts low energy (2.2 keV/u). high current (25 rnA) beams with low charge states (U2+,Xe+) at an operating frequency of2? MHz. Results of structure development and beam experiments for both structures are discussed which can be seen as model for the first crucial part of a RFQ for low charged radioactive beams concerning low frequency operation, high duty factor and beam dynamics properties.

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