Journal
REVIEW OF SCIENTIFIC INSTRUMENTS
Volume 87, Issue 11, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4960755
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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 (XEUS, 8-70 angstrom), Long-Wavelength Extreme Ultraviolet Spectrometer (LoWEUS, 190-440 angstrom), and Metal Monitor and Lithium Spectrometer Assembly (MonaLisa, 50-220 angstrom). 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 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. Published by AIP Publishing.
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