% IMPORTANT: The following is UTF-8 encoded.  This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.

@TECHREPORT{Busche:136163,
      author       = {Busche, Erik},
      title        = {{L}adungsaustausch-{S}pektroskopie an der
                      {B}almer-$\alpha$-{L}inie an {TEXTOR}},
      volume       = {3375},
      number       = {Juel-3375},
      address      = {Jülich},
      publisher    = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
      reportid     = {PreJuSER-136163, Juel-3375},
      series       = {Berichte des Forschungszentrums Jülich},
      pages        = {86 S.},
      year         = {1997},
      note         = {Record converted from JUWEL: 18.07.2013; Zugl.: Essen,
                      Univ., Diss., 1997},
      abstract     = {The quantitative measurement of ion temperatures is of
                      great relevance for the interpretation of experiments
                      related to controlled fusion research. The diagnostics,
                      which have been developed for this purpose, are often
                      indirect and have to be checked for consistency. For
                      spectrocopic diagnostics this concerns in particular the
                      comparison between measurements on impurities with those on
                      the Hydrogen isotopes. Charge exchange recombination
                      spectroscopy (CXRS) is a diagnostic, which allows the
                      determination of radial resolved ion temperatures. The
                      analysis of the H- or D-spectra are problematic because of
                      several effects. For this reason, normally spectra of light
                      impurities are used for CXRS. In this report the charge
                      exchange spectrum of Hand D is analysed and the results are
                      compared to other independent measurements. The two effects,
                      which are the most important for complicating the analysis,
                      are the dependence of the effective emission coefficient on
                      the collision energy and the halo effect. Both have been
                      simulated numerically. In the case of the
                      O"cx(Ered-dependence it is shown, that for the parameter
                      range of TEXTOR the resulting spectrum can be approximated
                      with a gaussian. For the calculation of ion temperatures and
                      toroidal velocities correction values have been introduced
                      with the species distribution of the neutral beam particles
                      taken into account. A numerical transport model has been
                      developed for the halo effect. With this the density and
                      temperature distribution of the neutral H or D particles
                      surrounding the neutral beam was calculated and the
                      resulting spectra were simulated. The conclusionis that the
                      halo has a large influenceon the locality of the measurement
                      and contributes significantly to the measured photon flux,
                      but that the influence on the measured temperature profile
                      is larger than other typical experimental errors only at the
                      plasma edge. Under different plasma conditions Da-spectra
                      have been measured and analysed. A general trend is a
                      central ion temperature, which lies above the electron
                      temperature for neutral beam heated discharges. The shape of
                      the radial profiles did not depart significantly from the
                      Te-profiles. The impurity ion temperatures, which have been
                      evaluated from CXRS spectra of CVI and Nex, were higher than
                      the D temperatures in the case of higher temperatures and
                      lower densities. For lower temperatures and higher
                      densities, as eg in the case of radiative I-mode discharges,
                      the temperatures agreed within the typical error bars},
      cin          = {IEF-4},
      cid          = {I:(DE-Juel1)VDB812},
      shelfmark    = {PGH - Plasma diagnostics},
      typ          = {PUB:(DE-HGF)29},
      url          = {https://juser.fz-juelich.de/record/136163},
}