Filters

20192

More filters

20212
Reset filters

Settings

End date: 2019 × DDC: 530 × DDC: 540 × Publisher: Hoboken, NJ : Wiley Interscience ×

Search Results

Now showing 1 - 2 of 2
  • Thumbnail Image
    Item
    Development of a model for ultra-precise surface machining of N-BK7® using microwave-driven reactive plasma jet machining
    (Hoboken, NJ : Wiley Interscience, 2019) Kazemi, Faezeh; Boehm, Georg; Arnold, Thomas
    In this paper, extensive studies are conducted as key to overcoming several challenging limitations in applying fluorine-based reactive plasma jet machining (PJM) to surface machining of N-BK7®, particularly regarding the manufacture of freeform optical elements. The chemical composition and lateral distributions of the residual layer are evaluated by X-ray photoelectron spectroscopy and scanning electron microscopy/energy-dispersive X-ray spectroscopy analysis aiming at clarifying the exact chemical kinetics between plasma generated active particles and the N-BK7 surface atoms. Subsequently, a model is developed by performing static etchings to consider the time-varying nonlinearity of the material removal rate and estimate the local etching rate function. Finally, the derived model is extended into the dynamic machining process, and the outcomes are compared with the experimental results.
  • Thumbnail Image
    Item
    White paper on plasma for medicine and hygiene: Future in plasma health sciences
    (Hoboken, NJ : Wiley Interscience, 2019) Bekeschus, Sander; Favia, Pietro; Robert, Eric; von Woedtke, Thomas
    Plasma Science and Technology offer their valuable contribution to human health since more than 50 years, after decades of experiences in the field of biomaterials; and more than a decade in using plasmas for therapeutic uses in medicine. Current knowledge as well as key challenges and opportunities for the human health have been intensely discussed during the Future in Plasma Science II (FIPS II) workshop in February 2016 in Greifswald, Germany. This contribution summarizes the major outcomes of the meeting and the current literature and consensus with an emphasis on major challenges in the fields of Plasma Science and Technology for improving human health.