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29 July 2010 Stigmatic grazing-incidence x-ray spectrograph for solar coronal observations
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Abstract
We present the design for a stigmatic grazing incidence X-ray spectrograph designed for solar coronal observations. The spectrograph is composed of a slit, a pair of paraboloid mirrors and a plano varied-line-space grating. All reflective surfaces of the spectrograph operate at an angle of incidence of 88 degrees, and covers a wavelength range of 0.6 to 2.4nm (0.5 to 2.0keV). The design achieves 1.5pm spectral resolution and 15 μm spatial resolution over a 2.5mmlong slit. The current spectrograph design is intended for a sounding rocket experiment, and designed to fit inside a NASA sounding rocket payload behind a 1.1m focal length Wolter Type-1 telescope. This combination will have a 2.5arcsec spatial resolution and a 8 arcminute slit length. We are currently fabricating a laboratory prototype of the spectrograph to demonstrate the performance and establish the alignment procedures for a flight model.
© (2010) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Ken Kobayashi, Jonathan Cirtain, Leon Golub, Kelly Korreck, Peter Cheimets, Edward Hertz, and David Caldwell "Stigmatic grazing-incidence x-ray spectrograph for solar coronal observations", Proc. SPIE 7732, Space Telescopes and Instrumentation 2010: Ultraviolet to Gamma Ray, 773233 (29 July 2010); https://doi.org/10.1117/12.856793
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