Bochum 2018 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 52: Poster
HK 52.61: Poster
Donnerstag, 1. März 2018, 16:30–18:45, Audimax Foyer
Radiation Hardness of pcCVD Detectors and precise IC Calibration — •Steffen Schlemme1,2, Mladen Kis1, Chiara Nociforo1, Fabio Schirru1, Joachim Enders2, P. Figuera3, J. Frühauf1, A. Kratz1, N. Kurz1, S. Löchner1, A. Musumarra3,4, S. Salamone3, B. Szczepanczyk1, M. Träger1, and R. Visinka1 — 1GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany — 2Schlossgartenstr. 9 — 3LNS-INFN Catania, Italy — 4University of Catania, Italy
A new in-flight separator Super-FRS is under construction at FAIR/Darmstadt. Ion rates up to 3× 1011 238U/spill demand an adaptation of detectors to a high radiation environment. Test experiments to investigate the radiation hardness and absolute efficiency of single- (SC) and polycrystalline (PC) diamond detectors have been performed at the LNS-INFN in Catania using a 12C beam at 62MeV/u and intensities of up to 1.5pnA. Counting efficiencies of 100% and 95% were found for the SC and PC respectively. While the SC showed a decrease in signal quality after 25KGy the signal quality of the PC did not show a significant decrease after 3.5MGy. Further the prototypes of an ionisation chamber (IC) and secondary electron monitor (SEM) designed for the use at the Super-FRS have been tested. Both detectors were operationable and a calibration of the IC and SEM using each the SC as reference achieved precisions of 1% and 5% respecively concluding that C is the far lower limit for a direct calibration of the SEM using the SC directly.