Coating of diamonds for detector application
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We report on the development of processes for pretreatment, coating, and tempering of structured layers on diamond surfaces for detector applications. The different steps were developed and processed in close collaboration with the GSI detector laboratory and with feedback from the experiment. Beginning with thermal evaporation and electron beam evaporation we currently use magnetron sputtering as standard coating technique for diamonds in a system especially equipped for this purpose. The layers of choice are mostly chromium–gold or titanium–platinum–gold; sometimes also single layers of aluminum, copper or palladium. The application of the coated diamonds in a detector for the HADES-experiment is described.
KeywordsCoating Diamond Detector application Magnetron sputtering Structured surface
Many thanks to Gabi Otto, GSI, for some of the pictures. The authors want to thank Elèni Berdermann, Michael Träger and Robert Visinka of the detector laboratory and Jerzy Pietraszko of the HADES group for the close collaboration, fruitful discussions and for providing some of the pictures.