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@ARTICLE{Dickheuer:864166,
      author       = {Dickheuer, Sven and Marchuk, Oleksandr and Krasikov, Yuri
                      and Mertens, Philippe and Brandt, Christian and Ertmer,
                      Stephan and Börner, Petra and Reiter, Detlev and Göths,
                      Beatrix and von Bovert, Kalle and Kreter, Arkadi},
      title        = {{P}olarization by light reflection at metallic surfaces
                      observed in the shape of the {B}almer- α line of low
                      density plasmas},
      journal      = {Physics of plasmas},
      volume       = {26},
      number       = {7},
      issn         = {1089-7674},
      address      = {[S.l.]},
      publisher    = {American Institute of Physics},
      reportid     = {FZJ-2019-04032},
      pages        = {073513 -},
      year         = {2019},
      abstract     = {The degree of linear polarization of light reflected at
                      metallic surfaces is obtained from the shape of the
                      Balmer-α line measured in a low density plasma. The
                      measurements of the polarization properties of metallic
                      surfaces utilize only the high-resolution emission spectra
                      induced by fast reflected H atoms (≈100 eV) in ArH
                      plasmas. The measurements are performed at two different
                      lines-of-sight to the target surfaces of Mo and Cu. Only at
                      the observation angle close to the Brewster one, a
                      significant drop of the measured red-shifted signal is
                      detected for the Mo target: the red-shifted emission reduces
                      by $≈50\%$ depending on whether the transverse (S) or the
                      parallel (P) polarization component of the reflected light
                      is selected. In contrast to this, a very weak change of
                      emission is observed for the Cu surface for the same angle.
                      The spectra measured in front of the Mo target were modeled
                      utilizing the energy and angular distribution of reflected
                      atoms and excitation of the cross section of Ar-H collision
                      combined in a Doppler-shifted emission model. A good
                      agreement with the theoretical calculations is found for
                      polarization components (except for the weak P polarization
                      at 70°). Finally, the undercosine distribution of the
                      reflected atoms with b ≈ 0.2 (b is the power of the
                      cosine distribution) shows the best agreement with the
                      spectra measured at both lines-of-sight},
      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:000478679900012},
      doi          = {10.1063/1.5088931},
      url          = {https://juser.fz-juelich.de/record/864166},
}