1. Test and first application of artificial sapphire sensors
- Author
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Alexandr Ignatenko, Nicoleta Baboi, Michael Schmitz, Hans Henschel, Sergej Schuwalow, Wolfgang Lange, Wolfgang Lohmann, O. Hensler, and Kay Wittenburg
- Subjects
Materials science ,business.industry ,Diamond ,engineering.material ,Signal ,Monocrystalline silicon ,Flash (photography) ,Absorbed dose ,Sapphire ,engineering ,Optoelectronics ,Dosimetry ,business ,Radiation hardening - Abstract
Samples of monocrystalline sapphire sensors of 10×10 mm2 area and 0.5 mm thickness with the initial charge collection efficiency of about 2% have been studied in electron beams. The response as a function of the absorbed dose revealed excellent radiation hardness. The signal size dropped smoothly with the absorbed dose approaching 30% of the signal of non-irradiated sensors after the dose of 12 MGy. Four sapphire sensors have been installed, together with four pCVD diamond sensors, as a beam halo monitor of the FLASH facility. A report on the commissioning and operation experience is given.
- Published
- 2010
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