% 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”.

@INPROCEEDINGS{Litnovsky:829753,
      author       = {Litnovsky, A. and Krasikov, Yu. and Rasinski, M. and
                      Kreter, A. and Linsmeier, Ch. and Mertens, Ph. and
                      Unterberg, B. and Breuer, Uwe and Wegener, T.},
      title        = {{F}irst direct comparative test of single crystal rhodium
                      and molybdenum mirrors for {ITER} diagnostics},
      journal      = {Fusion engineering and design},
      volume       = {123},
      issn         = {0920-3796},
      address      = {New York, NY [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2017-03387},
      pages        = {674-677},
      year         = {2017},
      abstract     = {All optical and laser diagnostics in ITER will use mirrors
                      to observe the plasma radiation. In the ITER environment,
                      mirrors may become contaminated with plasma impurities
                      hampering the performance of corresponding diagnostics. An
                      in-situ mirror cleaning is proposed, which relies on ion
                      sputtering of the contaminants and the affected mirror
                      material. Previous research demonstrated the advantages of
                      single crystal (SC) molybdenum (Mo) under sputtering
                      conditions over polycrystalline concepts. Recently, the
                      first single crystal rhodium (Rh) mirrors became available
                      and tests have been started at the Forschungszentrum
                      Jülich.In a direct test, SC Rh and SC Mo mirrors were
                      exposed under identical conditions in steady-state helium
                      plasmas in the linear plasma device PSI 2. The energy of
                      impinging ions was ∼100 eV matching conditions expected in
                      the in-situ cleaning system in ITER. During exposure,
                      molybdenum mirrors lost 420–500 nm due to sputtering.
                      Rhodium mirrors lost about 1 μm. Exposure corresponded to
                      50–100 cleaning cycles in ITER. Nevertheless, rhodium
                      mirrors have preserved their specular reflectivity, showing
                      the maximum degradation of less than $7\%$ at 250 nm.
                      Molybdenum mirrors demonstrated a moderate decrease of
                      specular reflectivity of $12–25\%.$ Results open new
                      perspectives for the use of single crystals in ITER
                      diagnostics.},
      month         = {Sep},
      date          = {2016-09-05},
      organization  = {29th Symposium on Fusion Technology
                       (SOFT 2016), Prague (Czech Republic), 5
                       Sep 2016 - 9 Sep 2016},
      cin          = {IEK-4 / ZEA-3},
      ddc          = {620},
      cid          = {I:(DE-Juel1)IEK-4-20101013 / I:(DE-Juel1)ZEA-3-20090406},
      pnm          = {113 - Methods and Concepts for Material Development
                      (POF3-113) / HITEC - Helmholtz Interdisciplinary Doctoral
                      Training in Energy and Climate Research (HITEC)
                      (HITEC-20170406)},
      pid          = {G:(DE-HGF)POF3-113 / G:(DE-Juel1)HITEC-20170406},
      typ          = {PUB:(DE-HGF)16 / PUB:(DE-HGF)8},
      UT           = {WOS:000418992000140},
      doi          = {10.1016/j.fusengdes.2017.03.053},
      url          = {https://juser.fz-juelich.de/record/829753},
}