Speaker
Description
As part of a research collaboration between MedAustron and TU Wien, the feasibility of delivering mixed helium and carbon beams for online range verification during carbon ion treatment is investigated. This includes the generation of mixed 4He2+ and 12C6+ beams within a single ion source. While generating and extracting such beams is possible, the beam composition cannot be determined with the conventional low-energy (8 keV/u) beam diagnostic devices installed at MedAustron. The use of a gas-filled charge-exchange cell is proposed to enable the identification of constituents with the same charge-to-mass ratio in multi-isotopic beams. The measurement procedure foresees the multi-isotopic beam to traverse a region of higher pressure, where the different ion types are partially neutralized. Since charge capture leads to distinct new q/m ratios, the individual beam components can be separated after the gas cell and the partial intensities can be quantified if the charge exchange cross sections are known. The proposal is accompanied by an estimation of the population density for mixed 4He2+ and 12C6+ beams after partial neutralization, which were benchmarked with measurements.
Funding Agency
Austrian Ministry of Education, Science, and Research; RTI-Strategy Lower Austria 2027
| Region represented | Europe |
|---|---|
| Paper preparation format | LaTeX |
