Absolute calibration of X-ray semiconductor detectors against synchrotron radiation of the VEPP-3 storage ring

Abstract

The results are presented of absolute spectral responsivity measurements for SPPD11 and SPPD11-04 pulse-type silicon semiconductor detectors (developed by the Research Institute of Pulse Technique, Moscow), carried out over the X-ray energy range from 1.5 keV to 20 keV with a relative uncertainty of typically 5 10 -2 . In our measurements, the detector is positioned in a calculable synchrotron radiation flux behind filters of well-known transmittance. The spectral responsivity of the detector is restored on the basis of measurement data using a set of integral equations. Two procedures have been developed to improve the calibration accuracy: one for the experimental determination of the X-ray transmittance near the K absorption edge of the filters used, with a relative uncertainty not exceeding 2 10 -2 ; and another for the estimation of the angular spread of the electrons.

Kosmos station: Application of synchrotron radiation from the VEPP-4M storage ring for metrological measurements in the VUV and soft X-ray ranges

“…The equipment calibrated at the station finds its application in plasma physics, astrophysics, as well as in the development of technol ogies for EUV nanolithography. Since the station came into operation, a number of X ray detectors (sil icon photodiodes, secondary electron multipliers, X ray vacuum diodes) [11,18], the Space Solar Patrol apparatus [1], and reflecting X ray optical elements designed to monitor high temperature plasma [19] have been calibrated. Currently works are being car ried out on improving and expanding the methodolog ical base of the station.…”

“…The method of selective filters has been perfected at the station for the calibration of detectors at the VEPP 2M storage ring and can be used successfully at the Kosmos station [18]. It is a modification of the standard detector method, is based on the parametric model of the detector type (2), does not require there to be a monochromator at the station, and yields a cal ibration accuracy on the level of 5-10%.…”

The Metrology Light Source – The new dedicated electron storage ring of PTB

“…Electron storage rings with calculable bending magnet radiation are used as primary source standards for radiometry in the spectral range from the visible to the X-ray region [1] at several national metrology institutes, such as the National Institute of Standards and Technology (at the SURF III electron storage ring, Gaithersburg, USA [21]), the National Metrology Institute of Japan (at the TERAS electron storage ring, Tsukuba, Japan [22]), the Budker Institute of Nuclear Physics (at the VEPP-3 electron storage ring, Novosibirsk, Russia [23]) or PTB (at the BESSY II electron storage ring [2,24]). Typical radiometric applications are the calibration of radiation sources [10,25] or the calibration of energy-dispersive detectors [26,27] with a known response function by direct illumination with the calculable synchrotron radiation.…”

A superconducting wavelength shifter as primary radiometric source standard in the X-ray range

“…Electron storage rings with calculable bending magnet radiation are used as primary source standards for radiometry at several other national metrology institutes, such as the National Institute of Standards and Technology (at SURF III, Gaithersburg, USA [11]), the National Metrology Institute of Japan (at TERAS, Tsukuba, Japan [12]) or the Budker Institute of Nuclear Physics (at VEPP-3, Novosibirsk, Russia [13]). …”