An ultraviolet-visible-near infrared overview spectroscopy for divertor plasma diagnosis on Wendelstein 7-X
Y. Wei,
E. Wang,
Y. Liang,
S. Brezinsek,
B. Schweer,
M. Krychowiak,
O. Neubauer,
R. König,
S. Sereda,
Ch. Linsmeier,
W7-X Team
Affiliations
Y. Wei
Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung—Plasmaphysik, Partner of the Trilateral Euregio Cluster (TEC), 52425 Jülich, Germany
E. Wang
Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung—Plasmaphysik, Partner of the Trilateral Euregio Cluster (TEC), 52425 Jülich, Germany
Y. Liang
Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung—Plasmaphysik, Partner of the Trilateral Euregio Cluster (TEC), 52425 Jülich, Germany
S. Brezinsek
Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung—Plasmaphysik, Partner of the Trilateral Euregio Cluster (TEC), 52425 Jülich, Germany
B. Schweer
Laboratoire de Physique des Plasmas-Laboratorium voor Plasmafysica, ERM/KMS, 1000 Brussels, Belgium
M. Krychowiak
Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
O. Neubauer
Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung—Plasmaphysik, Partner of the Trilateral Euregio Cluster (TEC), 52425 Jülich, Germany
R. König
Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
S. Sereda
Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung—Plasmaphysik, Partner of the Trilateral Euregio Cluster (TEC), 52425 Jülich, Germany
Ch. Linsmeier
Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung—Plasmaphysik, Partner of the Trilateral Euregio Cluster (TEC), 52425 Jülich, Germany
A new ultraviolet-visible-near infrared (UV-VIS-NIR) overview spectroscopy has been developed for routinely monitoring divertor recycling, intrinsic and extrinsic impurity fluxes on Wendelstein 7-X (W7-X). The overview spectroscopy is part of a large integrated system which allows several diagnostic systems to share the same field of view through an endoscope. During the first divertor operation phase on W7-X, a temporary view port was setup for the overview spectroscopy in order to investigate the divertor plasmas and provide reference data for the commissioning of the whole integrated endoscope system. The overview spectroscopy uses a 5-channel spectrometer to cover the wavelength range 300-1100 nm. The reciprocal linear dispersion of the spectrometer are in the range of 0.04-0.19 nm/pixel. The spatial coverage of the system is 10 cm in the vertical direction and 20 cm in the toroidal direction. The first full spectral survey identified H, He, C, O, Fe, Ne, N and Ar lines. The temporal evolutions of hydrogen and impurity radiation with maximum 10 ms resolution were obtained. Spectra fall in the range of filter transmission curves have been investigated for the filter camera systems which will be commissioned along with the endoscope in the next operation phase.
