Microcalorimeter measurement of x-ray spectra from a high-temperature magnetically confined plasma

Eckart, M. E.; Beiersdorfer, P.; Brown, G. V.; Den Hartog, D. J.; Hell, N.; Kelley, R. L.; Kilbourne, C. A.; Magee, E. W.; Mangoba, A. -E. Y.; Nornberg, M. D.; Porter, F. S.; Reusch, L. M.; Wallace, J. P.

doi:10.1063/5.0043980

Microcalorimeter measurement of x-ray spectra from a high-temperature magnetically confined plasma

Journal Article · Thu Jun 17 00:00:00 EDT 2021 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/5.0043980· OSTI ID:1797526

; ; ; Den Hartog, D. J.; ; Kelley, R. L.; ; ; Mangoba, A. -E. Y.; ; Porter, F. S.; Reusch, L. M.;

A NASA-built x-ray microcalorimeter spectrometer has been installed on the MST facility at the Wisconsin Plasma Physics Laboratory and has recorded x-ray photons emitted by impurity ions of aluminum in a majority deuterium plasma. Much of the x-ray microcalorimeter development has been driven by the needs of astrophysics missions, where imaging arrays with few-eV spectral resolution are required. The goal of our project is to adapt these single-photon-counting microcalorimeters for magnetic fusion energy research and demonstrate the value of such measurements for fusion science. Microcalorimeter spectrometers combine the best characteristics of the x-ray instrumentation currently available on fusion devices: high spectral resolution similar to an x-ray crystal spectrometer and the broadband coverage of an x-ray pulse height analysis system. Fusion experiments are increasingly employing high-Z plasma-facing components and require measurement of the concentration of all impurity ion species in the plasma. This diagnostic has the capability to satisfy this need for multi-species impurity ion data and will also contribute to measurements of impurity ion temperature and flow velocity, Zeff, and electron density. Here, we introduce x-ray microcalorimeter detectors and discuss the diagnostic capability for magnetic fusion energy experiments. We describe our experimental setup and spectrometer operation approach at MST, and we present the results from an initial measurement campaign.

View Accepted Manuscript (Publisher)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC52-07NA27344; SC0018266

OSTI ID:: 1797526

Journal Information:: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 6 Vol. 92; ISSN 0034-6748

Publisher:: American Institute of PhysicsCopyright Statement

Country of Publication:: United States

Language:: English

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