Performance predictions of the SPARC x-ray crystal spectrometers for ion temperature and toroidal rotation measurements

SPARC will be outfitted with three systems of x-ray crystal spectrometer arrays. Two of these are designed using cylindrically bent crystals to achieve high spectral-resolution for ion temperature and toroidal velocity measurements via imaging He-like Kr and Ne-like Xe. The last acts as a spectral s...

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Bibliographic Details
Published in:Review of scientific instruments 2024-08, Vol.95 (8)
Main Authors: Perks, C., Vezinet, D., Rice, J. E., Reinke, M. L.
Format: Article
Language:English
Subjects:
Continuum radiation
Crystals
Ion temperature
Line shape
Ray tracing
Tofu
Velocity distribution
X ray imagery
X ray spectrometers
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Summary:SPARC will be outfitted with three systems of x-ray crystal spectrometer arrays. Two of these are designed using cylindrically bent crystals to achieve high spectral-resolution for ion temperature and toroidal velocity measurements via imaging He-like Kr and Ne-like Xe. The last acts as a spectral survey system to monitor Ne-like W and nearby H- and He-like emission from Cr, Fe, Co, Ni, and Cu. Line radiation intensities are calculated using the Flexible Atomic Code for atomic data and ColRadPy for collisional-radiative modeling, then convoluted with a Voigt line shape. Free–free, free-bound, and two-photon continuum radiation is also included. The ToFu code is used to perform volume-of-sight integration to produce synthetic detector images. In addition, presented is cross-validation performed using the XICSRT Monte Carlo ray-tracing code. Ion temperature and toroidal velocity profiles are reconstructed using ToFu via tomographic inversion.
ISSN:0034-6748
1089-7623
1089-7623
DOI:10.1063/5.0219521