Hannover 2016 – wissenschaftliches Programm
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P: Fachverband Plasmaphysik
P 8: Laser Plasmas I
P 8.9: Vortrag
Dienstag, 1. März 2016, 16:45–17:00, b302
Laser Drilling of Wolfram Nozzle Plates and Characterization of Their Plasma-Generating Capabilities — •Marvin Tammen1,2,3, Klaus Mann1, Ulrich Teubner2,3, and Matthias Müller1 — 1Laser-Laboratorium Göttingen e.V., AG Optik/Kurze Wellenlängen — 2Hochschule Emden/Leer, Institut für Laser und Optik — 3Carl von Ossietzky Universität Oldenburg, Institut für Physik
Transmission X-ray microscopy in the spectral range of the so-called “water window” region (2.3 nm < λ < 4.4 nm) is a powerful tool for the investigation of biological and mineralogical samples. One lab-scale implementation of a soft X-ray microscope is based on a laser-induced plasma source utilizing a pulsed gas jet.
When inducing plasmas in gas targets, the corresponding gas pulse shape and hence the resulting plasma emission need to be optimized regarding the amount of achievable radiation. In this respect, it is of vital importance to specify the nozzle geometry that is used to form the gas pulse. In the present work, it is shown that adequate nozzles can be produced with a simple lab-scale setup involving a pulsed laser source. Furthermore, nozzle performance is characterized with regard to the resulting gas flow and plasma emission.