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@ARTICLE{Sergienko:828690,
      author       = {Sergienko, Gennady and Esser, Hans Günter and Nonhoff,
                      Marko and Huber, Alexander and Freisinger, Michaele and
                      Linsmeier, Christian},
      title        = {{I}mproving accuracy of {P}enning gauge spectroscopy for
                      the determination of hydrogen isotope {H}/{D} ratios},
      journal      = {Fusion engineering and design},
      volume       = {123},
      issn         = {0920-3796},
      address      = {New York, NY [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2017-02582},
      pages        = {906-910},
      year         = {2017},
      abstract     = {Atomic spectral lines emitted from a Penning discharge are
                      often used to quantify partial pressures and isotopes ratios
                      in gases. To identify the potential of this method for
                      thermal desorption studies, the hydrogen emission spectrum
                      lines (Hα and Dα) were examined by an Alcatel Penning
                      gauge. The hydrogen/deuterium pressures were measured by
                      both a capacitive vacuum gauge and the Penning gauge.
                      Different gas mixtures were produced by varying of
                      hydrogen/deuterium flows. The Balmer-alpha lines intensities
                      were recorded with help of a high etendue spectrometer
                      coupled to the Penning gauge using relay optics together
                      with fiber bundle and equipped with Peltier cooled CCD
                      camera. Subsequent measurements using hydrogen and deuterium
                      gases revealed for identical pressures in the range of
                      10−6–10−3 mbar that the Hα line intensities are
                      systematically higher the Dα line intensities by a factor
                      of 1.28 ± 0.01. This observation can be explained by the
                      dissociative excitation of the molecular hydrogen by
                      electron impact. In addition the Hα line intensity for the
                      H2 gas having constant partial pressure is slightly
                      increased with total gas mixture pressure. Taking into
                      account of both effects essentially improves the accuracy of
                      the determination of partial pressures and isotope H/D
                      ratios.},
      cin          = {IEK-4},
      ddc          = {620},
      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:000418992000190},
      doi          = {10.1016/j.fusengdes.2017.03.092},
      url          = {https://juser.fz-juelich.de/record/828690},
}