Prof. Henryk Fiedorowicz Profile

Prof. Henryk Fiedorowicz

Professor at Wojskowa Akademia Techniczna

SPIE Involvement:

Author

Publications (86)

Proceedings Article | 22 October 2019

Recent advances in development and application of laser plasma x-ray sources based on a gas puff target (Conference Presentation)

Henryk Fiedorowicz, Przemyslaw Wachulak, Andrzej Bartnik

Proc. SPIE. 11110, Advances in Laboratory-based X-Ray Sources, Optics, and Applications VII

KEYWORDS: Optical coherence tomography, Spectroscopy, X-rays, X-ray sources, Laser applications, Laser development, Extreme ultraviolet, Pulsed laser operation, X-ray technology, Plasma

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Proceedings Article | 9 September 2019

Nanoimaging using a compact laser plasma soft x-ray source based on a gas puff target

Przemysław Wachulak, Andrzej Bartnik, Henryk Fiedorowicz

Proc. SPIE. 11112, X-Ray Nanoimaging: Instruments and Methods IV

KEYWORDS: Microscopes, Nanoimaging, Optical coherence tomography, X-rays, X-ray sources, X-ray microscopy, Laser development, Spatial resolution, X-ray imaging, Plasma

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Proceedings Article | 22 July 2019

Advances in microscopic imaging at the nanoscale using soft X-rays and extreme ultraviolet (EUV) from a compact laser plasma source

Przemyslaw Wachulak, Andrzej Bartnik, Henryk Fiedorowicz

Proc. SPIE. 11076, Advances in Microscopic Imaging II

KEYWORDS: Microscopes, Light sources, X-ray optics, X-rays, X-ray microscopy, Extreme ultraviolet, Spatial resolution, X-ray imaging, EUV optics, Plasma

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Proceedings Article | 19 July 2019

A nanometer axial resolution x-ray coherence tomography with a broadband SXR radiation emitted from a compact laser plasma double-stream gas-puff target source

Przemyslaw Wachulak, Andrzej Bartnik, Antony Jose Arikkatt, Henryk Fiedorowicz

Proc. SPIE. 11078, Optical Coherence Imaging Techniques and Imaging in Scattering Media III

KEYWORDS: Optical coherence tomography, Spectroscopy, X-rays, Reflectivity, Tomography, Extreme ultraviolet, Krypton, Plasma

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Proceedings Article | 14 May 2019

Interaction of intense nanosecond pulses of extreme ultraviolet (EUV) with gases and solids (Conference Presentation)

Andrzej Bartnik, Wojciech Skrzeczanowski, Joanna Czwartos, Jerzy Kostecki, Henryk Fiedorowicz, Przemyslaw Wachulak, Tomasz Fok

Proc. SPIE. 11035, Optics Damage and Materials Processing by EUV/X-ray Radiation VII

KEYWORDS: Chemical species, Polymers, Molecules, Gases, Solids, Ionization, Extreme ultraviolet, Pulsed laser operation, Plasma, Laser systems engineering

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In this work investigations concerning interaction of intense, nanosecond EUV pulses with matter were performed. Various laser-produced plasma radiation sources were employed for creation of the driving EUV pulses. The sources were based on two different laser systems with pulse energies ranging from 0.8 J to 10J and pulse duration 4 ÷ 10 ns. They were equipped with the EUV collectors for focusing of the radiation. This way radiation fluence up to 0.5 J/cm2 in the interaction region was obtained. In our experiments solid material samples or gases injected into the vacuum chamber synchronously with the EUV pulses were irradiated. Irradiation of the gases resulted in ionization and excitation of atoms and molecules forming low temperature plasmas with a relatively high electron density. Emission spectra obtained from these plasmas, contained spectral lines corresponding to radiative transitions in atoms, molecules, atomic or molecular ions. For analysis of the EUV spectra numerical simulations were performed, using a collisional-radiative PrismSPECT code. For computer simulations of the molecular spectra measured in the UV/VIS range a LIFBASE and Specair codes were employed. This way ionization states together with various thermodynamic parameters were deduced. Irradiation of solid samples resulted in melting of a thin near-surface layer or, in some cases its ablation or even conversion to a low temperature plasma. It depended on physico-chemical properties of the material and its thickness. In case of organic polymers, usually ablation connected with fragmentation of the polymer molecules, took place. In case of thick samples of inorganic solids, a thin near surface layer was heated up to a high temperature exceeding melting or even boiling point. In most cases different kinds of micro- or nanostructures were created, modifying the surface morphology. Except the EUV interaction with solid materials, simultaneous EUV and the EUV induced plasma treatment was investigated. Plasmas were created in gases injected close to the exposed surface. Part of the EUV radiation was absorbed in the injected gas forming the low temperature plasma near the surface, while the other part of radiation, that was not absorbed, interacted with the surface material. This way additional atoms could be incorporated into the molecular structure of the exposed material, or reactive etching took place. Especially interesting results were obtained using molecular gases for creation the reactive plasmas.

Proceedings Article | 26 April 2019

Tomographic imaging using a compact soft X-ray microscope based on a laser plasma light source

P. Wachulak, A. Torrisi, W. Krauze, A. Bartnik , J. Kostecki, M. Maisano, H. Fiedorowicz