Speaker
Description
The implementation of a sequential injection scheme for mixing helium and carbon ions from different ion sources at the MedAustron accelerator facility enabled the first successful delivery of a mixed helium and carbon ion beam in a synchrotron therapy facility. A precise knowledge of both the helium and the carbon properties is an essential input for designing treatment monitoring experiments, however, it is not trivial to distinguish the helium and carbon beam properties within the mixed beam.
Within this contribution, we discuss methods to characterize the properties of the extracted mixed 4He2+ and 12C6+ beam in the experimental room and present respective measurements from the beam that is currently delivered to treatment monitoring research experiments at MedAustron. A key property is the ion composition, where the helium content can be varied between 0-100% using the sequential injection scheme. While this possibility of tuning the mixing ratio is highly beneficial to the experiments, the achieved mixing ratio (usually between 10-20% required) is currently subject to significant shot-to-shot fluctuations. Moreover, we discuss observed differences in the transverse beam sizes of the extracted helium and carbon ion beams.
Funding Agency
Austrian Ministry of Education, Science, and Research; Gesellschaft für Forschungsförderung NÖ RTI-Strategy Lower Austria 2027 Grant No. FTI23-D-031
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