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

Benattar, Rene, Kessel, R., Walton, D. M., Culhane, J. L., Holland, W. S., Hepburn, I. D., Ade, Peter A. R. and Griffin, Matthew J. 1989. Thermal Detectors As X-Ray Calorimeters: Theoretical And Experimental Results And Data Processing Techniques. Presented at: X-Ray Instrumentation in Medicine and Biology, Plasma Physics , Astrophysics, and Synchrotron Radiation :European Congress on Optics 2 (ECO2), Paris, France, 25-28 April 1989. Published in: Benattar, Rene ed. X-ray instrumentation in medicine and biology, plasma physics, astrophysics, and synchrotron radiation : 25-28 April 1989, Paris, France : ECO2. Proceedings of SPIE--the International Society for Optical Engineering , vol. 1140. Bellingham, WA: Society of Photo-optical Instrumentation Engineers, p. 84. 10.1117/12.961806

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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.

Item Type: Conference or Workshop Item (Paper)
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Additional Information:
Publisher: Society of Photo-optical Instrumentation Engineers
ISBN: 9780819401762
ISSN: 0277-786X
Last Modified: 10 Jan 2018 14:51

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