High-accuracy X-ray detector calibration at PTB

Details High-accuracy X-ray detector calibration at PTB High-accuracy X-ray detector calibration at PTB

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004spie.5501..277k&link_type=abstract

High-Energy Detectors in Astronomy. Edited by Holland, Andrew D. Proceedings of the SPIE, Volume 5501, pp. 277-285 (2004).

Astronomy and Astrophysics

Astronomy

2

Scientific paper

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.

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