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Proceedings Paper

Examinations Of Detector Systems For High Photon Rates In The Ultrasoft X-Ray Region
Author(s): Peter Guttmann
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Paper Abstract

For biological and medical examinations ultrasoft x-rays in the wavelength range of 2.3 nm up to 4.5 nm are well suited. To get good images of objects with low contrast such as biological specimens a high signal to noise ratio is, required. As example in a scanning x-ray microscope high photon rates with more than 10° photons/s in the scanning spot are needed. The radiation dose of the specimens should be as small as possible. For that reason the Gottingen scanning x-ray microscope working at BESSY is best suited. To use for the image formation as much photons as possible it is necessary to build up a detector system with a high detective quantum efficiency (DQE) and with the possibility to process high photon rates. In form of a short review the advantages and disadvantages of detector systems for ultrasoft x-rays are described. Detailled examinations of a photon counting detector system with a proportional counter are described. Results of detector systems with two different diodes - one passivated ion-implanted silicon junction diode and one GaAsP-Schottky diode are given. New results with an integrating GaAsP-Schottky diode detector system will be presented.

Paper Details

Date Published: 1 January 1986
PDF: 8 pages
Proc. SPIE 0733, Soft X-Ray Optics and Technology, (1 January 1986); doi: 10.1117/12.964952
Show Author Affiliations
Peter Guttmann, Universitat Gottingen (West-Germany)

Published in SPIE Proceedings Vol. 0733:
Soft X-Ray Optics and Technology
E. Koch; Guenther A. Schmahl, Editor(s)

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