High throughput multilayer mirror based soft x-ray spectrometer for metallic impurity emission from tokamaks

Journal Article · Mon Oct 01 04:00:00 EDT 1990 · Review of Scientific Instruments; (USA)

DOI:https://doi.org/10.1063/1.1141831· OSTI ID:6205919

Zwicker, A P; Regan, S P; Finkenthal, M; Moos, H W ^[1]

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1. Department of Physics and Astronomy, Johns Hopkins University, Baltimore, MD (USA)

A near-normal incidence high throughput spectrometer with a flat multilayer mirror (MLM) as the dispersive element has been built and operated on the Texas Experimental Tokamak (TEXT). Using a Mo/B{sub 4}C MLM that has a reflectivity of 20--30% and a bandpass of 4--9 A (FWHM), the instrument has a wavelength range of 90--180 A. The spectra obtained with this instrument have been compared to an artificial spectrum based upon a collisional-radiative model. From this comparison it is possible to identify the dominant titanium emission lines responsible for the broadband shape of the low-resolution experimental spectrum. This work is part of our continuing development of simple, near-normal incidence high throughput spectrometers for tokamak plasma diagnostics.

• OSTI ID: 6205919
• Journal Information: Review of Scientific Instruments; (USA), Journal Name: Review of Scientific Instruments; (USA) Vol. 61:10; ISSN RSINA; ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700102* -- Fusion Energy-- Plasma Research-- Diagnostics
CLOSED PLASMA DEVICES
DESIGN
MEASURING INSTRUMENTS
MIRRORS
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
PLASMA DIAGNOSTICS
REFLECTIVITY
SPECTROMETERS
SURFACE PROPERTIES
TEXT DEVICES
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
X-RAY SPECTROMETERS