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Proceedings Paper

Solid-State 1024 Pixel Linear X-Ray Detector
Author(s): B. Munier; G. Roziere; P. Prieur; H. Rougeot
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Paper Abstract

An X-ray sensitive detector of 1024 pixels for non-destructive testing is described. The detection pitch is 0.45 mm and the total sensitive length is 460 mm. In standard operation, the detector is in the path of an X-ray beam collimated with a 0.45 mm slit. The detector delivers a digital video signal as an object is displaced at constant speed through the X-ray beam. The image is displayed on a TV monitor using a frame memory. Each line is read in 7.8 ms. A 1024 x 512 pixels image is read in 4.4 s. The detector is an assembly of 16 arrays of 64 silicon photodiodes. A scintillating screen converts the X-ray flux into visible photons to which the silicon photodiodes are sensitive. The photodiode arrays are multiplexed by silicon Charge Transfer Devices. The functions of the detector are as follows : multiplexing of the 1024 pixels signals, analog to digital conversion and level compensations. The correction levels are stored in a digital memory. The main characteristics of the detector are as follows - energy detection range : 10 keV - 250 keV - nominal X-ray energy : 60 keV - noise equivalent X-ray dose : 5 X photons at 60 keV on the detector - saturation level : 300 p,11. at 60 keV - dynamic range : > 4000. Some applications of these detectors are given.

Paper Details

Date Published: 3 August 1987
PDF: 5 pages
Proc. SPIE 0809, Scanning Imaging Technology, (3 August 1987); doi: 10.1117/12.941500
Show Author Affiliations
B. Munier, THOMSON-CSF Division Tubes Electroniques (France)
G. Roziere, THOMSON-CSF Division Tubes Electroniques (France)
P. Prieur, THOMSON-CSF Division Tubes Electroniques (France)
H. Rougeot, THOMSON-CSF Division Tubes Electroniques (France)

Published in SPIE Proceedings Vol. 0809:
Scanning Imaging Technology
Ludwig J. Balk; Tony Wilson, Editor(s)

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