IEAP - Institute of Experimental and Applied Physics CTU - Czech Technical University in Prague
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IEAP - Institute of Experimental and Applied Physics CTU - Czech Technical University in Prague
CTU - Czech Technical University in Prague
Partial tasks  > Radiation Imaging in Material Science
Radiation Imaging in Material Science

Method “X Ray Dynamic Defectoscopy (XRDD)” uses Medipix device for the observation of time evolution of damage processes in a loaded specimen body. Even though the specimen is loaded monotonously and slowly, damaging can proceed discontinuously and relatively fast. Therefore high frame rate acquisition of X-ray images is crucial for real dynamic (time dependent) defectoscopy.

The method enables the observation of material density variations with micrometric accuracy. The test sample is illuminated by X rays during the loading process. Measured changes in transmission represent effective alterations in the sample thicknesses which are understood as weakening of the material due to damage volume fraction.

Sensitivity of the XRDD method depends on the ratio between incident and transmitted X ray beam intensity and on the fraction of scattered photons, the efficiency of the Medipix2 device at the X-ray energy used and the spectra of the X-ray tube.

Responsible person


Number Name Agency
LC06041 Research center "Fabrication, modification and characterization of materials by energetic radiation" MŠMT
106/04/0567 Study of damage zone in high ductile materials in vicinity of crack tip by X-Ray Dynamic Defectoscopy method GAČR
MSM 6840770040 Research Program 40: Usage of radionuclides and ionizing radiation. MŠMT

Articles in Impacted Journals
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Ocenění Name Author Scientific journal OceněníYear
Non-destructive imaging of framents of historical beeswax seals using high-contrast X-ray micro-radiography and micro-tomography with large area photon-counting detector array Karch J.; Bartl B.; Dudák J.; Žemlička J.; Krejčí F. Micron (accepted) 2016
Visualization of delamination in composite materials utilizing advanced X-ray imaging techniques Vavřík D.; Jakůbek J.; Jandejsek I.; Krejčí F.; Kumpová I.; Žemlička J. Journal of Instrumentation 10 C04012 2015
High-contrast X-ray Radiography Using Hybrid Semiconductor Pixel Detectors with 1 mm thick Si sensor as a Tool for Monitoring Liquids in Natural Building Krejčí F.; Slavíková M.; Žemlička J.; Jakůbek J.; Kotlík P. Journal of Instrumentation 9 C07014 2014
X-ray Radiography and Tomography for Monitoring the Penetration Depth of Consolidants in Opuka - the Building stone of Prague Monuments Slavíková M.; Krejčí F.; Žemlička J.; Pech M.; Kotlík P.; Jakůbek J. Journal of Cultural Heritage 13 (4), 357-364 2012
CT Artefact Reduction by Signal to Thickness Calibration Function Shaping Vavřík D. NIM A, Volume 633, Supplement 1, May 2011, Pages S152-S155 2011
Evaluation of strain field in microstructures using micro-CT and digital volume correlation Jiroušek O.; Jandejsek I.; Vavřík D. JINST 6 C01039 doi:10.1088/1748-0221/6/01/C01039 2011
Image processing for X-ray transmission radiography with 3D voxel detector Jandejsek I.; Soukup P.; Jakůbek J. JINST 6 C12061 doi:10.1088/1748-0221/6/12/C12061 2011
Metal Grain Structure Resolved with Table-top micro-Tomographic System Vavřík D.; Soukup P. JINST_007P_1011 2011
Neutron Analysis for Microvoids in an Adhesive Layer between High X-ray Attenuation Materials Nguyen T.; Vavřík D.; Lehmann E.; Jeon I. Appl. Phys. Express 4 (2011) 066401 2011
Real-time X-ray microradiographic imaging and image correlation for local strain mapping in single trabecula under mechanical load Doktor T.; Jiroušek O.; Zlámal P.; Jandejsek I. JINST 6 C11007 doi:10.1088/1748-0221/6/11/C11007 2011
Slow-neutron-induced charged-particle emission-channeling-measurements with Medipix detectors Koester U.; Granja C.; Jakůbek J.; Uher J.; Vacík J. Nucl. Instr. Methods A 633 (2011) S267-S269 2011
X-ray color imaging with 3D sensitive voxel detector Soukup P.; Jakůbek J.; Jandejsek I.; Žemlička J. JINST 6 C12014 doi:10.1088/1748-0221/6/12/C12014 2011
X-ray dynamic defectoscopy utilizing digital image correlation Jandejsek I.; Nachtrab F.; Uhlmann N.; Vavřík D. NIM A, Volume 633, Supplement 1, May 2011, Pages S185-S18 2011
Radiogram enhancement and linearization using the beam hardening correction method Vavřík D.; Jakůbek J. NIM A, Vol. 607, Issue 1, p. 212-214 2009
Micrometric scale measurement of material structure moving utilizing μ-radiographic technique Vavřík D.; Jakůbek J.; Holý T. NIM A, Vol. 591, Issue 1, p. 24-27 2008
Phase contrast enhanced high resolution X-ray imaging and tomography of soft tissue Jakůbek J.; Granja C.; Dammer J.; Tykva R.; Hanus R.; Uher J.; Vykydal Z. Nucl. Instr. and Meth. A, Volume: 571, Issue: 1-2, Pages: 69-72, doi: 10.1016/j.nima.2006.10.031 2007
Experimental system for high resolution X-ray transmission radiography Jakůbek J.; Vavřík D.; Holý T.; Jakůbek M.; Vykydal Z. Nucl. Instr. and Meth. A, Volume: 563, Issue 1, Pages: 278-281, doi: 10.1016/j.nima.2006.01.033 2006
Quality of X-ray transmission radiography based on single photon counting pixel device Jakůbek J.; Vavřík D.; Pospíšil S.; Uher J. NIM A Vol. 546, pages 113-117 2005
Tomography for XRDD Jakůbek J.; Holý T.; Pospíšil S.; Vavřík D. NIM A Vol. 531, pages 307-313 2004
Resolution and stability tests of a Medipix-1 pixel detector for X-ray dynamic defectoscopy Jakůbek J.; Pospíšil S.; Vavřík D.; Visschers J. NIM A Vol. 509, pages 294-301 2003
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