A CT system for the analysis of prehistoric ice cores
S.259-270 The task was to measure ice cores with a diameter of 10 cm and a length of 1 m that were drilled out of Arctic and Antarctic glaciers down to 3,000 m depth. By means of computed tomography (CT), pieces of 1 m length are measured and three-dimensional volume data with high spatial resolutio...
| Main Authors: | , , , |
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| Format: | Other/Unknown Material |
| Language: | English |
| Published: |
2011
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| Subjects: | |
| Online Access: | https://publica.fraunhofer.de/handle/publica/227282 https://doi.org/10.1007/978-3-642-23071-4_25 |
| Summary: | S.259-270 The task was to measure ice cores with a diameter of 10 cm and a length of 1 m that were drilled out of Arctic and Antarctic glaciers down to 3,000 m depth. By means of computed tomography (CT), pieces of 1 m length are measured and three-dimensional volume data with high spatial resolution are reconstructed. Complex image processing algorithms are applied to analyze the volume regarding its mean porosity as a function of depth, its total mean porosity and the volumetric distribution of the pores. Since high image quality is required to achieve precise results, a vast amount of data is acquired. The geometry of the samples increases the requirements for the X-ray components. Furthermore measurements have to be made in an environment of -15 C. |
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