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@MASTERSTHESIS{Janes:1008824,
      author       = {Janes, Andre},
      othercontributors = {Dimroth, Anton and Rötger, Arne and Butzek, Michael},
      title        = {{K}onzeptionierung und {A}uslegung einer
                      {R}öntgentarget-{S}truktur für die
                      {H}ochleistungs-{S}trahlentherapie},
      school       = {Bergische Universität Wuppertal},
      type         = {Masterarbeit},
      reportid     = {FZJ-2023-02496},
      pages        = {91},
      year         = {2022},
      note         = {Masterarbeit, Bergische Universität Wuppertal, 2022},
      abstract     = {Microbeam radiation therapy offers great potential to
                      revolutionize cancer therapy. To enablethe clinical use of
                      microbeams, new compact devices are needed. The “Line
                      focus x-ray tube” (LFXT)is a promising concept. By
                      introducing the usage of the heat capacity limit, the
                      development of a newx-ray target structure for an LFXT will
                      be realized.The presented work pursues the question of how
                      to realize an X-ray target structure with an electronbeam
                      power load of 1.5 MW. For this purpose, different designs
                      and concepts are compared and onthe basis of this
                      comparison, a potential solution is developed. Based on this
                      concept, the componentsof the target are designed. The
                      material selection of the components is carried out with the
                      variousAshby plots, in consideration of specific material
                      requirements. The following dimensioning of thecomponents is
                      based on both analytical calculations and numerical
                      simulations (Ansys). In addition,the well-known problem of
                      carbon diffusion and the associated embrittlement of the
                      focal track isdiscussed.The results of the material
                      selection indicate Carbon fiber reinforced Carbon (CFRC) to
                      be the mostsuitable material for the carrier structure and
                      tungsten-rhenium alloys as the best material for thefocal
                      track. The performed calculations and simulations indicate a
                      CFRC-Structure with a diameterof 660 mm and a
                      quasi-isotropic laminate is a promising solution. A minimum
                      thickness of 1 mm isrecommended for the focal track. This
                      constellation should ensure operation with a 1.5 MW
                      electronbeam and a rotation frequency of 200 Hz for at least
                      1 second. To reduce the carbon diffusion betweenCFRC and
                      Tungsten common techniques like coating with SiC and Al2O3
                      and the use of rheniumtungstenmultilayers are discussed. It
                      can be concluded that the use of rhenium-tungsten
                      multilayers isa promising application. This thesis goes on
                      to discuss whether replacing the tungsten interlayers
                      withtantalum provides additional benefits. The results
                      suggest that tantalum can be an effective diffusionbarrier
                      and could increase the lifetime of the focal track.},
      cin          = {ZEA-1},
      cid          = {I:(DE-Juel1)ZEA-1-20090406},
      pnm          = {899 - ohne Topic (POF4-899) / DFG project 416790481 -
                      Tumortherapie mit Mikrostrahlen an kompakter Strahlenquelle
                      (416790481)},
      pid          = {G:(DE-HGF)POF4-899 / G:(GEPRIS)416790481},
      typ          = {PUB:(DE-HGF)19},
      doi          = {10.34734/FZJ-2023-02496},
      url          = {https://juser.fz-juelich.de/record/1008824},
}