Thermal Detectors As X-Ray Calorimeters: Theoretical And Experimental Results And Data Processing Techniques

R. Kessel; D. M. Walton; J. L. Culhane; W. S. Holland; I. D. Hepburn; P. A. R. Ade; M. J. Griffin

doi:10.1117/12.961806

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27 November 1989 Thermal Detectors As X-Ray Calorimeters: Theoretical And Experimental Results And Data Processing Techniques

R. Kessel, D. M. Walton, J. L. Culhane, W. S. Holland, I. D. Hepburn, P. A. R. Ade, M. J. Griffin

Author Affiliations +

Proceedings Volume 1140, X-Ray Instrumentation in Medicine and Biology, Plasma Physics, Astrophysics, and Synchrotron Radiation; (1989) https://doi.org/10.1117/12.961806
Event: 1989 International Congress on Optical Science and Engineering, 1989, Paris, France

Abstract

We report measurements on the energy resolution of germanium X-ray calorimeters for the energy range 1-50 keV. The detector we use is a modified infrared bolometer which is currently operated at ³He temperatures (0.31K) and is capable of attaining a FWHM of 172 eV for 5.9 keV X-rays. We have identified and characterized two types of event which can contaminate the spectrum of the bare germanium calorimeter. The first type is due to photons absorbed in the indium soldered contacts of the detector. The second type is due to β-particles striking the detector. The theoretical performance of such a device has been modelled by considering the individual noise sources that limit the energy resolution. We also present a discussion concerning the post-processing of data which employs both the techniques of matched filtering and maximum entropy method deconvolution.

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R. Kessel, D. M. Walton, J. L. Culhane, W. S. Holland, I. D. Hepburn, P. A. R. Ade, and M. J. Griffin "Thermal Detectors As X-Ray Calorimeters: Theoretical And Experimental Results And Data Processing Techniques", Proc. SPIE 1140, X-Ray Instrumentation in Medicine and Biology, Plasma Physics, Astrophysics, and Synchrotron Radiation, (27 November 1989); https://doi.org/10.1117/12.961806

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