Results found: 3

Number of results on page

Search results

Search:
in the keywords: 81.70.Tx

Sort By:

Limit search:

High Resolution Eddy Current Tomography System for Nondestructive Testing

100%

Salach J., Szewczyk R.

Acta Physica Polonica A

2014

vol. 126

issue 1

402-403

Idea of the high-resolution eddy current tomography is presented. Proposed system gives possibility of testing cylinder-shaped elements made of both magnetic and non-magnetic materials. To validate the concept, the tomographic measurements are carried out on set of steel cylinders with non-magnetic copper inclusion. Measurements were done during both linear and rotational movement of the element. Achieved results indicate the high sensitivity of system, which creates possibility of its application for non-destructive testing of the elements made of ferromagnetic and non-magnetic materials.

Comparison of Various Reconstruction Techniques for Line Projections

80%

Kontrym-Sznajd G., Samsel-Czekała M., Biasini M.

Acta Physica Polonica A

2008

vol. 113

issue 5

1429-1434

The most effective and popular algorithms to reconstruct the three-dimensional electron-positron momentum density from the measurements of the two-dimensional angular correlation of annihilation radiation are based on the Fourier transform or polynomial expansion. We compare the efficacy of different methods in reconstructing the momentum density of the rare-earth based compounds ErGa_3, CeIn_3 and model profiles, presenting also our new filtering algorithm.

Preliminary Investigations of Elemental Content, Microporosity, and Specific Surface Area of Porous Rocks Using PIXE and X-ray Microtomography Techniques

80%

Bielecki J., Bożek S., Dutkiewicz E., Hajduk R., Jarzyna J., Lekki J., Pieprzyca T., Stachura Z., Szklarz Z., Kwiatek W.

Acta Physica Polonica A

2012

vol. 121

issue 2

474-479

Determination of physical properties of porous geological materials is of great importance for oil industry. The knowledge of rocks properties is usually obtained from porosity studies such as pore size distribution, specific surface area determination, and hydrodynamic permeability calculations. This study describes determination of elemental composition and measurements of the particular physical properties of geological samples (porous sandstone rocks) by means of the nuclear and X-ray microprobes at the Institute of Nuclear Physics, Polish Academy of Sciences in Kraków, Poland. The special emphasis has been put on the computed microtomography method. Measurements have been carried out in close cooperation with Department of Geophysics, FGGEP AGH in Kraków, Poland. Chemical composition of the Rotliegend sandstone rock samples (few millimeters diameter), extracted from a borehole at 2679.6 m, 2741.4 m and 2742.4 m depth have been investigated using the 2.2 MeV proton beam (proton induced X-ray emission technique). Next, measurements of the porosity and the specific surface area of the pore space have been carried out using the X-ray microtomography technique. Basing on microtomographic data obtained with the high spatial resolution, simulations of the fluid dynamic in the void space of porous media have been carried out. Lattice Boltzmann method in the 3DQ19 geometrical model has been used in order to predict the hydraulic permeability of the media. In order to avoid viscosity-permeability dependence the multiple-relaxation-time model with half-way bounce back boundary conditions has been used. Computing power-consuming processing has been performed with the use of modern grid infrastructure.

Refine search results

3 Acta Physica Polonica A

1 2014

1 2012

1 2008

1 Biasini M.

1 Bielecki J.

1 Bożek S.

1 Dutkiewicz E.

1 Hajduk R.

1 Jarzyna J.

1 Kontrym-Sznajd G.

1 Kwiatek W.

1 Lekki J.

1 Pieprzyca T.

1 Salach J.

1 Samsel-Czekała M.

1 Stachura Z.

1 Szewczyk R.

1 Szklarz Z.

Search results

High Resolution Eddy Current Tomography System for Nondestructive Testing

Comparison of Various Reconstruction Techniques for Line Projections

Preliminary Investigations of Elemental Content, Microporosity, and Specific Surface Area of Porous Rocks Using PIXE and X-ray Microtomography Techniques