High-accuracy calibration of the HXDS HPGe detector at the PTB radiometry laboratory at BESSY

Details High-accuracy calibration of the HXDS HPGe detector at the PTB radiometry laboratory at BESSY High-accuracy calibration of the HXDS HPGe detector at the PTB radiometry laboratory at BESSY

Oct 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997spie.3114..101k&link_type=abstract

Proc. SPIE Vol. 3114, p. 101-112, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy VIII, Oswald H. Siegmund; Mark A. Gumm

Astronomy and Astrophysics

Astronomy

2

Scientific paper

The Smithsonian Astrophysical Observatory is performing the calibration of the AXAF High Resolution Mirror Assembly (HRMA) at the Marshall Space Flight Center. In order to determine the absolute incoming photon flux at the calibration facility a high purity germanium (HPGe) detector and an identical spare detector have been chosen as flux monitor of the HRMA x-ray detection system (HXDS). The detectors must thus be calibrated in the photon energy range between 700 eV and 10 keV. The calibration and characterization of the detectors was performed at the radiometry laboratory of the Physikalisch- Technische Bundesanstalt (PTB) at the electron storage ring BESSY. Two methods have been applied for the determination of the detection efficiency. Firstly, the undispersed calculable synchrotron radiation emitted by a bending magnet of the primary source standard BESSY has been used. Secondly, the detection efficiency has been determined using monochromatized radiation and Si photodiodes as transfer detector standards. The photodiodes have been calibrated with a relative uncertainty of 0.5% in the photon energy range from 50 eV to 1500 eV against a cryogenic electrical substitution radiometer which is a primary detector standard. It is shown that the determination of the detection efficiency in the whole desired spectral range is possible with a relative uncertainty between 1% and 2%, even in the photon energy range where the detection efficiency is affected by the x-ray absorption finestructures of the Al light blocking filter of the detector.

Affiliated with

Also associated with

No associations

Rating

High-accuracy calibration of the HXDS HPGe detector at the PTB radiometry laboratory at BESSY does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with High-accuracy calibration of the HXDS HPGe detector at the PTB radiometry laboratory at BESSY, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High-accuracy calibration of the HXDS HPGe detector at the PTB radiometry laboratory at BESSY will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1158175