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400 results on '"WACHULAK, P."'

1. Influence of spectra sewing on XCT measurement

Author

Arikkat, A. J., Janulewicz, K. A., Kim, C. M., and Wachulak, P.

Subjects
Physics - Atomic Physics
Abstract

The paper presents an analysis of the possible spectra manipulation and its consequence for the specific application of XCT. The focus was on the modification of the registered spectra dominantly by the sewing/stitching method. A model spectrum was created to analyse the possible behaviour of the spectral components when specifically arranged. The model and processing of real experimental data revealed that careful spectral sewing can be a very useful procedure and typically leads to improvement of the results obtained with the XCT technique. The results recommended also cautiousness in the choice of the applied modification and scale. In some cases gain or spectral enhancement of a part of the spectrum can be considered also as a sort of sewing, and improve the XCT results., Comment: 9 pages, 5 figures, 19 references

Published
2024

6. Tabletop single-shot extreme ultraviolet Fourier transform holography of an extended object

Author

Malm, Erik B., Monserud, Nils C., Brown, Christopher G., Wachulak, Przemyslaw W., Xu, Huiwen, Balakrishnan, Ganesh, Chao, Weilun, Anderson, Erik, and Marconi, Mario C.

Subjects
Physics - Optics, Physics - Plasma Physics
Abstract

We demonstrate single and multi-shot Fourier transform holography with the use of a tabletop extreme ultraviolet laser. The reference wave was produced by a Fresnel zone plate with a central opening that allowed the incident beam to illuminate the sample directly. The high reference wave intensity allows for larger objects to be imaged compared to mask-based lensless Fourier transform holography techniques. We obtain a spatial resolution of 169 nm from a single laser pulse and a resolution of 128 nm from an accumulation of 20 laser pulses for an object ~11x11{\mu}m 2 in size. This experiment utilized a tabletop extreme ultraviolet laser that produces a highly coherent ~1.2 ns laser pulse at 46.9 nm wavelength.

Published
2018
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14. Compact NEXAFS System Based on Laser-Plasma Soft X-ray Light Source for the Analysis of Barium Edges in a B+BaF2 Optical Filter.

Author

FOK, T., WACHULAK, P., WARDZINSKA, M., BARTNIK, A., NYGA, P., NOWAK, M. P., and FIEDOROWICZ, H.

Subjects
*BARIUM fluoride, *X-ray absorption near edge structure, *SOFT X rays, *LIGHT filters, *LIGHT sources, *BARIUM, *DIFFRACTION gratings, *RADIATION absorption
Abstract

In this work, we present the results of the analysis performed with near edge absorption fine structure spectroscopy of barium edges in a B+BaF2 optical filter. The radiation was generated by a laser-plasma soft X-ray source based on a double-stream gas puff target. The use of a flat-field spectrometer based on a diffraction grating allowed us to collect the absorption spectra of the radiation transmitted by the analyzed optical filter. The results demonstrate the appearance of clear M-edges of barium (M4 and M5). [ABSTRACT FROM AUTHOR]

Published
2024
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23. Advances in Nanoscale Resolution Soft X-Ray Laser Microscopy

Author

Menoni, C. S., Brizuela, F., Brewer, C., Martz, D., Wachulak, P., Jimenez, S. Fernandez, Marconi, M. C., Rocca, J. J., Chao, W., Anderson, E. H., Attwood, D. T., Vinogradov, A. V., Artioukov, I. A., Pershyn, Y. P., Kondratenko, V. V., Lewis, Ciaran L. S., editor, and Riley, Dave, editor

Published
2009
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26. Nanoexplosion initiated by short-wavelength radiation: Optical breakdown in soft matter revisited.

Author

Janulewicz, K. A., Jach, K., Świerczyński, R., Bartnik, A., Kostecki, J., Wachulak, P., Fiedorowicz, H., and Kim, C. M.

Subjects
RADIATION, LASER beams, MATTER, DE-Broglie waves, DUST explosions, MATERIAL plasticity, SOFT X rays
Abstract

The term "laser microexplosion" has been introduced to stress the violent character of the optical breakdown by laser radiation under conditions of tight focusing. Generally, the starting phase of the breakdown has been neglected by the assumption of absorption triggered by the presence of damage precursors. The application of the plasticity–elasticity theory in the analysis of the dynamics of this phenomenon has not been extensively examined to date. This paper formulates a phenomenological model attempting to explain the creation of nanovoids in a soft matter under irradiation by a flux of extreme ultraviolet (XUV)/soft x-ray photons. The combined action of plastic deformation and dissociation waves on soft matter is found to be responsible for the material modifications. It is suggested that localized (volume ≃ λ 3) abundance of energy, coming most likely from photon bunching, constitutes the real onset of the photo-ablative decomposition. It is shown that the coincidental presence of some small number of energy carriers (2–3 XUV photons in the considered case) in such a small volume triggers processes denoted from now on as a laser nanoexplosion. The effect is considered to be the first step in the optical breakdown followed by an intense material removal resembling, to some extent, a phase explosion. [ABSTRACT FROM AUTHOR]

Published
2020
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49. Roadmap on holography

Author

Sheridan, John T, primary, Kostuk, Raymond K, additional, Gil, Antonio Fimia, additional, Wang, Y, additional, Lu, W, additional, Zhong, H, additional, Tomita, Y, additional, Neipp, C, additional, Francés, J, additional, Gallego, S, additional, Pascual, I, additional, Marinova, V, additional, Lin, S-H, additional, Hsu, K-Y, additional, Bruder, F, additional, Hansen, S, additional, Manecke, C, additional, Meisenheimer, R, additional, Rewitz, C, additional, Rölle, T, additional, Odinokov, S, additional, Matoba, O, additional, Kumar, M, additional, Quan, X, additional, Awatsuji, Y, additional, Wachulak, P W, additional, Gorelaya, A V, additional, Sevryugin, A A, additional, Shalymov, E V, additional, Yu Venediktov, V, additional, Chmelik, R, additional, Ferrara, M A, additional, Coppola, G, additional, Márquez, A, additional, Beléndez, A, additional, Yang, W, additional, Yuste, R, additional, Bianco, A, additional, Zanutta, A, additional, Falldorf, C, additional, Healy, J J, additional, Fan, X, additional, Hennelly, B M, additional, Zhurminsky, I, additional, Schnieper, M, additional, Ferrini, R, additional, Fricke, S, additional, Situ, G, additional, Wang, H, additional, Abdurashitov, A S, additional, Tuchin, V V, additional, Petrov, N V, additional, Nomura, T, additional, Morim, D R, additional, and Saravanamuttu, K, additional

Published
2020
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