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Detection of x rays by a surface acoustic delay line in contact with a diamond crystal

MetadataDetails
Publication Date2021-03-29
JournalApplied Physics Letters
AuthorsDimitrios Topaltzikis, M. Wieluński, Andreas Hƶrner, Matthias Küß, Alexander Reiner
InstitutionsUniversity of Augsburg, Helmholtz Zentrum München
Citations4

In this study, we present proof of concept for an x-ray detector. The hybrid device consists of a synthetic single crystal diamond in mechanical contact with a piezoelectric lithium niobate surface acoustic wave (SAW) delay line. Upon x-ray irradiation, the diamond crystal experiences a change in conductivity, which, in turn, very sensitively influences the SAW transmission on the delay line. This change in SAW attenuation is directly used to monitor the x-ray beam intensity. The SAW attenuation shows a monotonic variation with dose rate D in the studied range between 100 and 1800 μGy/s. While the response time leaves room for further improvement, the SAW detection principle offers the unique possibility for wireless remote powering and sensing.

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