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Subject: Clusters ×

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    Recombination dynamics of clusters in intense extreme-ultraviolet and near-infrared fields
    ([London] : IOP, 2015) Schütte, Bernd; Oelze, Tim; Krikunova, Maria; Arbeiter, Mathias; Fennel, Thomas; Vrakking, Marc J. J.; Rouzée, Arnaud
    We investigate electron-ion recombination processes in clusters exposed to intense extreme-ultraviolet (XUV) or near-infrared (NIR) pulses. Using the technique of reionization of excited atoms from recombination (REAR), recently introduced in Schütte et al (2014 Phys. Rev. Lett. 112 253401), a large population of excited atoms, which are formed in the nanoplasma during cluster expansion, is identified under both ionization conditions. For intense XUV ionization of clusters, we find that the significance of recombination increases for increasing cluster sizes. In addition, larger fragments are strongly affected by recombination as well, as shown for the case of dimers. We demonstrate that for mixed Ar–Xe clusters exposed to intense NIR pulses, excited atoms and ions are preferentially formed in the Xe core. As a result of electron-ion recombination, higher charge states of Xe are efficiently suppressed, leading to an overall reduced expansion speed of the cluster core in comparison to the shell.
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    How Clusters Create Shared Value in Rural Areas: An Examination of Six Case Studies
    (Basel : MDPI, 2021) Martinidis, George; Adamseged, Muluken Elias; Dyjakon, Arkadiusz; Fallas, Yannis; Foutri, Angeliki; Grundmann, Philipp; Hamann, Karen; Minta, Stanislaw; Ntavos, Nikolaos; Råberg, Tora; Russo, Silvia; Viaggi, Davide
    The main aim of this paper is to demonstrate that clusters can support the sustainable development of rural areas through the creation of shared value. This is done via the close exam-ination of six different cases of rural clusters in Greece, Italy, Germany, Poland, Denmark, and Sweden. Qualitative as well as quantitative data were taken from the clusters, which demonstrated that their main business approaches naturally coincided with the creation of economic, social, and environmental benefits for the local communities in which they operated. The case clusters were created in a top-down manner, aimed at boosting regional R&D activities and making the local economy more competitive and more sustainable. However, private initiative took over and al-lowed these clusters to flourish because meeting the regions’ economic, social, and environmental needs successfully coincided with the target of the clusters’ own development and profitability. The results show that clusters, with their potential for shared value creation, can constitute a powerful engine for the revitalisation and development of rural areas, addressing the significant challenges which they are currently facing.