NEXAFS spectroscopy and spectromicroscopy with laser-produced plasma sources of soft x-ray radiation

P. Wachulak; M. Duda; A. Bartnik; A. Sarzyński; Ł. Węgrzyński; T. Fok; H. Fiedorowicz

doi:10.1117/12.2518237

4 December 2018 NEXAFS spectroscopy and spectromicroscopy with laser-produced plasma sources of soft x-ray radiation

P. Wachulak, M. Duda, A. Bartnik, A. Sarzyński, Ł. Węgrzyński, T. Fok, H. Fiedorowicz

Proceedings Volume 10974, Laser Technology 2018: Progress and Applications of Lasers; 1097412 (2018) https://doi.org/10.1117/12.2518237
Event: Thirteenth Symposium on Laser Technology, 2018, Jastarnia, Poland

Abstract

In this work, a near edge X-ray fine structure spectroscopy (NEXAFS) based on a laser-plasma compact soft X-ray (SXR) source is presented. The NEXAFS spectrum was acquired simultaneously for all energies near the absorption edge, using a broadband emission from krypton plasma, in contrary to the existing, synchrotron-based spectroscopic systems. In such SXR source, a plasma is produced by an interaction of a laser beam with a double stream gas puff target. The plasma efficiently emits SXR radiation from 2-5 nm wavelength (250-620 eV photon energy). Such broadband emission allows acquiring simultaneously a sample and a reference spectra, to obtain optical density spectrum of the sample near C-Kα absorption edge, due to a special construction of the SXR spectrometer. The NEXAFS spectra were obtained using PET polymer test sample, from both, the large area and spatially localized to ~30×30 μm² area. The spatially localized spectra were used to construct 2-D spectromicroscopic maps of sample constituents. Single-shot spectra were also acquired with laser pulse energies of ~10 times larger than in the case of multiple exposures. A short overview of those NEXAFS experiments will be presented.

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P. Wachulak, M. Duda, A. Bartnik, A. Sarzyński, Ł. Węgrzyński, T. Fok, and H. Fiedorowicz "NEXAFS spectroscopy and spectromicroscopy with laser-produced plasma sources of soft x-ray radiation", Proc. SPIE 10974, Laser Technology 2018: Progress and Applications of Lasers, 1097412 (4 December 2018); https://doi.org/10.1117/12.2518237

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