Synthetic diamonds for heavy-ion therapy dosimetry

In this paper we report on first results obtained using polycrystalline CVD diamond detectors irradiated with heavily ionizing particles at GSI/Darmstadt. At the UNILAC1 accelerator, ions with energies near the Bragg-Peak have been stopped inside the material whereas at the heavy-ion therapy facility of GSI these detectors are operated in transmission mode and have been studied in a carbon beam from SIS2 with energies ranging from 80 to 430 MeV/u.In both energy regimes high-bandwidth electronics have been used to count the number of impinging particles. Furthermore, the thermoluminescence (TL) response of synthetic-diamond dosimeters to heavily ionizing particles has been studied. A discussion of the results from the active and the passive radiation-detection and the dose verification is given, including the potential use of thermally stimulated luminescence from different synthetic diamonds in the field of heavy-ion dosimetry.