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@ARTICLE{Lus:891482,
      author       = {Luís, R. and Nietiadi, Y. and Silva, A. and Gonçalves, B.
                      and Franke, T. and Biel, W.},
      title        = {{N}uclear analysis of the {DEMO} divertor survey visible
                      high-resolution spectrometer},
      journal      = {Fusion engineering and design},
      volume       = {169},
      issn         = {0920-3796},
      address      = {New York, NY [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2021-01556},
      pages        = {112460 -},
      year         = {2021},
      abstract     = {Spectroscopic measurements have been recently proposed in
                      DEMO for divertor detachment control. In its current design,
                      the DEMO Divertor Survey Visible High-Resolution
                      Spectrometer is foreseen to perform spectroscopy
                      measurements by integrating three optical subsystems into an
                      equatorial port (EP). Behind the first wall, light travels
                      through a set of metallic mirrors and ducts before it
                      reaches the closure plate of the EP. This paper presents a
                      nuclear analysis performed with the Monte Carlo simulation
                      program MCNP6 for two alternative configurations of the
                      system. The results show that the configuration with 5
                      mirrors per transmission line is very effective to reduce
                      the neutron streaming through the port. However, it will not
                      be possible, with the current design, to introduce standard
                      electronics along the spectroscopy ducts, as the dose rate
                      limits for non-critical electronic components are exceeded
                      in both configurations. In the plasma-facing mirrors, the
                      heat loads are below 2 mW/cm3, which shows that the strategy
                      of recessing the first mirrors and placing them behind
                      small-diameter openings is effective to decrease the loads
                      in the mirrors. FISPACT simulations for different materials
                      show that material transmutation in the mirrors will be
                      negligible throughout the DEMO reactor lifetime.},
      cin          = {IEK-4},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IEK-4-20101013},
      pnm          = {134 - Plasma-Wand-Wechselwirkung (POF4-134)},
      pid          = {G:(DE-HGF)POF4-134},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000674482900005},
      doi          = {10.1016/j.fusengdes.2021.112460},
      url          = {https://juser.fz-juelich.de/record/891482},
}