Three new extreme ultraviolet spectrometers on NSTX-U for impurity monitoring

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 Å), Long-Wavelength Extreme Ultraviolet Spectrom...

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Bibliographic Details
Published in:Review of scientific instruments 2016-11, Vol.87 (11), p.11E324-11E324
Main Authors: Weller, M. E., Beiersdorfer, P., Soukhanovskii, V. A., Magee, E. W., Scotti, F.
Format: Article
Language:English
Subjects:
Atomic physics
BENCHMARKS
Consortia
Diagnostic systems
EXTREME ULTRAVIOLET RADIATION
GRAZING
IMPURITIES
INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
Ion transport
LASERS
LITHIUM
MONITORING
MONITORS
NSTX DEVICE
Scientific apparatus & instruments
Spectrometers
SPHERICAL CONFIGURATION
Toruses
TRANSPORT THEORY
ULTRAVIOLET SPECTROMETERS
WAVELENGTHS
X RADIATION
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Summary: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 Å), Long-Wavelength Extreme Ultraviolet Spectrometer (LoWEUS, 190–440 Å), and Metal Monitor and Lithium Spectrometer Assembly (MonaLisa, 50–220 Å). 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.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.4960755