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Proceedings Paper

High-accuracy x-ray detector calibration at PTB
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Paper Abstract

Many experiments in X-ray astronomy require absolutely calibrated detectors. Calibrations can be performed in the Radiometry Laboratory of the Physikalisch-Technische Bundesanstalt (PTB) at the electron storage ring BESSY II in Berlin. This synchrotron radiation source can be operated as primary source standard, providing a calculable spectral photon flux for the calibration of energy-dispersive detectors like Si(Li), HPGe or cryogenic STJ detectors. All detectors including non energy-dispersive devices like semiconductor photodiodes can be calibrated with monochromatized synchrotron radiation of high spectral purity against a primary detector standard, mainly a cryogenic electrical substitution radiometer, in the photon energy range from the UV up to about 60 keV with relative uncertainties of 1% or less. By using pencil beams, the homogeneity of the detector responsivity and the response function can be investigated, also for pixel detectors.

Paper Details

Date Published: 29 September 2004
PDF: 9 pages
Proc. SPIE 5501, High-Energy Detectors in Astronomy, (29 September 2004); doi: 10.1117/12.550467
Show Author Affiliations
Michael K. Krumrey, Physikalisch-Technische Bundesanstalt (Germany)
Frank Scholze, Physikalisch-Technische Bundesanstalt (Germany)


Published in SPIE Proceedings Vol. 5501:
High-Energy Detectors in Astronomy
Andrew D. Holland, Editor(s)

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