High resolution gamma ray tomography scanner for flow measurement and non-destructive testing applications

Journal Article · Mon Oct 15 00:00:00 EDT 2007 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.2795648· OSTI ID:21024442

Hampel, U; Bieberle, A; Hoppe, D; Kronenberg, J; Schleicher, E; Suehnel, T; Zimmermann, F; Zippe, C ^[1]

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1. Institute of Safety Research, Forschungszentrum Dresden-Rossendorf e.V., P.O. Box 51 01 19, 01314 Dresden (Germany)

We report on the development of a high resolution gamma ray tomography scanner that is operated with a Cs-137 isotopic source at 662 keV gamma photon energy and achieves a spatial image resolution of 0.2 line pairs/mm at 10% modulation transfer function for noncollimated detectors. It is primarily intended for the scientific study of flow regimes and phase fraction distributions in fuel element assemblies, chemical reactors, pipelines, and hydrodynamic machines. Furthermore, it is applicable to nondestructive testing of larger radiologically dense objects. The radiation detector is based on advanced avalanche photodiode technology in conjunction with lutetium yttrium orthosilicate scintillation crystals. The detector arc comprises 320 single detector elements which are operated in pulse counting mode. For measurements at fixed vessels or plant components, we built a computed tomography scanner gantry that comprises rotational and translational stages, power supply via slip rings, and data communication to the measurement personal computer via wireless local area network.

• OSTI ID: 21024442
• Journal Information: Review of Scientific Instruments, Vol. 78, Issue 10; Other Information: DOI: 10.1063/1.2795648; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
36 MATERIALS SCIENCE
CESIUM 137
CHEMICAL REACTORS
COMPUTERIZED TOMOGRAPHY
GAMMA DETECTION
GAMMA RADIATION
KEV RANGE 100-1000
LOCAL AREA NETWORKS
LUTETIUM
NONDESTRUCTIVE TESTING
PERSONAL COMPUTERS
PHOTODIODES
PHOTONS
RADIATION DETECTORS
RESOLUTION
SCINTILLATIONS
SILICATES
TRANSFER FUNCTIONS
YTTRIUM