Darmstadt 2016 – wissenschaftliches Programm
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AKBP: Arbeitskreis Beschleunigerphysik
AKBP 11: Poster
AKBP 11.19: Poster
Mittwoch, 16. März 2016, 18:30–20:30, S1/05 22-24
Investigation of the Imaging Properties of Inorganic Scintillation Screens using High Energetic Ion Beams — Alice Lieberwirth2, 3, Peter Forck1, Wolfgang Ensinger2, Oliver Kester3, Stephan Lederer2, and •Thomas Sieber1 — 1GSI Darmstadt, Germany — 2TU Darmstadt, Germany — 3JWG Universität Frankfurt/Main, Germany
Inorganic scintillation screens are a common diagnostics tool in heavy ion accelerators. In order to investigate the imaging properties of various screen materials, four different material compositions were irradiated at GSI, using protons up to Uranium ions as projectiles. Beams were extracted from SIS18 with high energy (300 MeV/u) in slow and fast extraction mode. During irradiation the scintillation response of the screens was simultaniously recorded by two different optical setups to investigate light output, profile characteristics and emission spectra. It was observed, that fast extracted beams induce in general lower light output than slow extracted beams, while the light output per deposited energy decreases with atomic number. The analysis of the spectral emission as well as investigations with classical optical methods showed no significant defect-building in all materials, not even under irradiation with increasing beam intensity or over long time periods. The investigated scintillation screens can be considered as stable under irradiation with high energetic heavy ion pulses and are appropriate for beam diagnostics applications in future accelerator facilities like FAIR. Characteristic properties and application areas of the screens are presented in the poster.