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Fabrication of advanced targets for laser driven nuclear fusion reactions through standard microelectronics technology approaches.

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    0481465 - UFP-V 2018 RIV GB eng J - Journal Article
    Picciotto, A. - Crivellari, M. - Bellutti, P. - Barozzi, M. - Kucharik, M. - Krása, Josef - Swidlovsky, A. - Malinowska, A. - Velyhan, Andriy - Ullschmied, Jiří - Margarone, Daniele
    Fabrication of advanced targets for laser driven nuclear fusion reactions through standard microelectronics technology approaches.
    Journal of Instrumentation. Roč. 12, October (2017), č. článku P10001. ISSN 1748-0221
    Grant - others:OP VK 2 LaserGen(XE) CZ.1.07/2.3.00/20.0087; LaserZdroj (OP VK 3)(XE) CZ.1.07/2.3.00/20.0279
    Institutional support: RVO:61389021 ; RVO:68378271
    Keywords : Nuclear instruments and methods for hot plasma diagnostics * Plasma generation (laserproduced, RF, x ray-produced) * Plasma diagnostics - charged-particle spectroscopy
    Subject RIV: BL - Plasma and Gas Discharge Physics; BL - Plasma and Gas Discharge Physics (FZU-D)
    OBOR OECD: 2.11 Other engineering and technologies; 2.11 Other engineering and technologies (FZU-D)
    Impact factor: 1.258, year: 2017
    http://iopscience.iop.org/article/10.1088/1748-0221/12/10/P10001/meta

    Silicon targets enriched with hydrogen and doped with boron at high atomic concentration (10(20)-10(22) cm(-3)) were designed and fabricated using ion implantation and thermal diffusion processes to be used for experiments in the field of laser driven nuclear fusion. Two main types of target were prepared: thin (2 mu m) foils and thick (500 mu m) slabs. Such targets were irradiated with a sub-nanosecond, kJ-class laser with a moderate intensity (similar to 10(16) W/cm(2)) to trigger the p(B-11, alpha)2 alpha nuclear fusion reaction thanks to the acceleration of proton streams with energy of 0.1-1 MeV. The combination of the ad-hoc developed targets and the given laser pulse parameters allowed to generate a very high flux of alpha particles (10(7)-10(9)/sr per shot).
    The paper mainly focuses on microfabrication techniques and processes optimized for the fabrication of such advanced targets and on a comparison of the key results achieved with the different targets used in the experiment. Hydrodynamic simulations are also discussed.

    Permanent Link: http://hdl.handle.net/11104/0277232