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@ARTICLE{Giacomelli:859893,
      author       = {Giacomelli, L. and Rigamonti, D. and Nocente, M. and Rebai,
                      M. and Tardocchi, M. and Cecconello, M. and Conroy, S. and
                      Hjalmarsson, A. and Franke, T. and Biel, W.},
      title        = {{C}onceptual studies of gamma ray diagnostics for {DEMO}
                      control},
      journal      = {Fusion engineering and design},
      volume       = {136},
      number       = {Part B},
      issn         = {0920-3796},
      address      = {New York, NY [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2019-00710},
      pages        = {1494 - 1498},
      year         = {2018},
      abstract     = {The future tokamak demonstration fusion reactor (DEMO) will
                      operate at unprecedented physical and technological
                      conditions where high reliability of the system components
                      is required. The conceptual study of a suite of DEMO
                      diagnostics is on-going. Among these, a Gamma-Ray
                      Spectrometric Instrument (GRSI) is being investigated to
                      assess its performance and information quality in view of
                      DEMO control. The GRSI foresees radial-orthogonal multi-line
                      of sight viewing DEMO plasma across its poloidal section as
                      a further development of the Gamma-Ray Camera of JET and of
                      the Radial Gamma-Ray Spectrometers proposed for ITER but
                      with stricter technological constraints. These include
                      surface availability in the Tritium Breeding Blankets of
                      DEMO vessel inner wall for diagnostics collimators openings,
                      diagnostics distance from the plasma, neutron irradiation
                      and activation of the reactor structures. On DEMO the
                      gamma-ray (γ) emission from DT plasmas consists of
                      T(d,γ)5He (Eγ = 16.63 MeV) and T(p,γ)4He
                      (Eγ = 19.81 MeV) reactions which for their high Eγ
                      would allow in principle for background-free measurements.
                      This work reports the assessment on the GRSI diagnostic
                      capability. Reactions cross sections are assessed and used
                      for the calculations of the reactions γ emission energy
                      spectrum under DEMO DT plasma conditions and compared with
                      14 MeV neutron emissions before and after the GRSI
                      collimator. Investigation of the GRSI γ spectrometers
                      performance is also presented. Measurement of the γ
                      emission intensity of T(d,γ)5He can be in principle used as
                      an independent assessment of DEMO DT plasmas fusion power.},
      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:000452575300120},
      doi          = {10.1016/j.fusengdes.2018.05.041},
      url          = {https://juser.fz-juelich.de/record/859893},
}