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@ARTICLE{Sergienko:864595,
      author       = {Sergienko, Gennady and Brezinsek, Sebastijan and Huber,
                      Alexander and Freisinger, Michaele},
      title        = {{H}ydrogen isotope ratios measurements by {P}enning gauge
                      spectroscopy of molecular {F}ulcher-α band},
      journal      = {Fusion engineering and design},
      volume       = {146},
      number       = {Part A},
      issn         = {0920-3796},
      address      = {New York, NY [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2019-04306},
      pages        = {1325 - 1328},
      year         = {2019},
      abstract     = {Penning gauge spectroscopy of Balmer-α lines of hydrogen
                      isotopes is widely used in fusion experiments to determine
                      the hydrogen isotope ratios and the partial pressures in the
                      pump duct. The Balmer-α line isotopic shifts are very small
                      < 0.176 nm and the lines partially overlap because of the
                      presence of energetic atoms produced by molecular
                      dissociation. The ro-vibrational emission bands of each
                      hydrogen isotopomer consist of many narrow spectral lines,
                      covering a wide wavelength span and have an unique
                      signature. To investigate the capability of the hydrogen
                      molecular spectroscopy for the isotopic ratio determination,
                      an Alcatel-type Penning gauge was coupled by the optical
                      fiber to the Echelle spectrometer having 365–715 nm
                      spectral range and the spectral resolving power above
                      20,000. The intensities of both atomic Balmer-α lines and
                      molecular Fulcher-α bands were measured in the range of
                      6·10−6 – 4·10-3 mbar. The rotational and vibrational
                      populations were almost independent of the gas pressure
                      below 2·10-4 mbar. The total intensities of the Fulcher-α
                      molecular bands were linearly proportional to the gas
                      pressure. The H2 and D2 molecular emission in 599–639 nm
                      spectral range were in a good agreement with the isotopic
                      composition of the used gas mixtures.},
      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:000488307400294},
      doi          = {10.1016/j.fusengdes.2019.02.068},
      url          = {https://juser.fz-juelich.de/record/864595},
}