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Title: Three New Extreme Ultraviolet Spectrometers on NSTX-U for Impurity Monitoring
Contributors: Weller, M.E.
Beiersdorfer, P.
Soukhanovskii, V.
Magee, E.W.
Scotti, F.
U. S. Department of Energy contract number DE-AC02-09CH11466
Keywords: Spectroscopy
Extreme ultraviolet
Impurity monitoring
Issue Date: 2016
Publisher: Princeton Plasma Physics Laboratory, Princeton University
Related Publication: Review of Scientific Instruments
Abstract: Three extreme ultraviolet (EUV) spectrometers have been mounted on the National Spherical Torus Experiment-Upgrade (NSTX-U). All three are flat-field grazing-incidence spectrometers and are dubbed X-ray and Extreme Ultraviolet Spectrometer (8 ñ 70 ≈), Long-Wavelength Extreme Ultraviolet Spectrometer (190 ñ 440 ≈), and Metal Monitor and Lithium Spectrometer Assembly (MonaLisa, 50 ñ 220 ≈). XEUS and LoWEUS were previously implemented on NSTX to monitor impurities from low- to high-Z sources and to study impurity transport while MonaLisa is new and provides the system increased spectral coverage. The spectrometers will also be a critical diagnostic on the planned laser blow-off (LBO) system for NSTX-U, which will be used for impurity edge and core ion transport studies, edge-transport code development, and benchmarking atomic physics codes.
Appears in Collections:NSTX-U

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