Speaker
Description
In this contribution, we report on the successful simultaneous acceleration of a beam composed of two different ions with unequal mass-to-charge ratio within the same cycle of the heavy ion synchrotron SIS18 at GSI. While acceleration of multiple charge states of a single ion species has been accomplished in linear accelerators, in a synchrotron this has never been done before to the knowledge of the authors. In a proof-of-principle experiment, low intensities of 56Fe25+ and 209Bi68+ were successively injected with horizontal multi-turn injection. Using two RF cavities, each ion species was then independently captured and accelerated in the same magnetic fields at its respective revolution frequency, the bunches of the lighter ion continuously overtaking those of the heavier ion. Such a beam composed of different ions has potential applications in particle therapy, plasma physics, nuclear physics, and materials research. The distinct revolution frequencies make this scheme attractive whenever independent control over the extraction of both ions is desired.
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