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@ARTICLE{Gonzalez:878575,
      author       = {Gonzalez, W. and Biel, W. and Mertens, Ph. and Tokar, M.
                      and Marchuk, O. and Linsmeier, Ch.},
      title        = {{C}onceptual studies on spectroscopy and radiation
                      diagnostic systems for plasma control on {DEMO}},
      journal      = {Fusion engineering and design},
      volume       = {146},
      issn         = {0920-3796},
      address      = {New York, NY [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2020-02918},
      pages        = {2297 - 2301},
      year         = {2019},
      abstract     = {The roadmap to the realization of fusion energy describes a
                      path towards the development of a DEMO tokamak reactor,
                      which is expected to provide electricity into the grid by
                      the mid of the century (Romanelli, 2013). The DEMO
                      diagnostic and control $(D\&C)$ system must provide
                      measurements with high reliability and accuracy, not only
                      constrained by space restrictions in the blanket, but also
                      by adverse effects induced by neutron, gamma radiation and
                      particle fluxes. In view of the concept development for DEMO
                      control, an initial selection of suitable diagnostics has
                      been obtained (Biel et al., 2019). This initial group of
                      diagnostic consists of 6 methods: Microwave diagnostics,
                      thermo-current measurements, magnetic diagnostics,
                      neutron/gamma diagnostics, IR interferometry/polarimetry,
                      and a variety of spectroscopic and radiation measurement
                      systems. A key aspect for the implementation, performance
                      and lifetime assessment of these systems on DEMO, is mainly
                      attributable to their location, that must be well protected,
                      and meet their own set of specific requirements. With this
                      in mind, sightline analysis, space consumption and the
                      evaluation of optical systems are the main assessment tools
                      to obtain a high level of integration, reliability and
                      robustness of all this instrumentation; essential features
                      in future commercial fusion power nuclear plants. In this
                      paper we concentrate on spectroscopic and radiation
                      measurement systems that require sightlines over a large
                      range of plasma regions and inner reactor surfaces.
                      Moreover, this paper outlines the main results and
                      strategies adopted in this early stage of DEMO conceptual
                      design to assess the feasibility of this initial set of
                      diagnostic methods based on sightlines and the integration
                      of these needed for DEMO $D\&C.$},
      cin          = {IEK-4},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IEK-4-20101013},
      pnm          = {174 - Plasma-Wall-Interaction (POF3-174)},
      pid          = {G:(DE-HGF)POF3-174},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000488313700196},
      doi          = {10.1016/j.fusengdes.2019.03.176},
      url          = {https://juser.fz-juelich.de/record/878575},
}