Subarcsecond x-ray telescope for imaging the solar corona in the 0.25- to 1.2-keV band

Dennis J. Gallagher; Webster C. Cash; Schuyler Jelsma; Jason Farmer

doi:10.1117/12.245085

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19 July 1996 Subarcsecond x-ray telescope for imaging the solar corona in the 0.25- to 1.2-keV band

Dennis J. Gallagher, Webster C. Cash, Schuyler Jelsma, Jason Farmer

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Proceedings Volume 2805, Multilayer and Grazing Incidence X-Ray/EUV Optics III; (1996) https://doi.org/10.1117/12.245085
Event: SPIE's 1996 International Symposium on Optical Science, Engineering, and Instrumentation, 1996, Denver, CO, United States

Abstract

We have developed an x-ray telescope that uses a new technique for focusing x-rays with grazing incidence optics. The telescope was built with spherical optics for all of its components, utilizing the high quality surfaces obtainable when polishing spherical (as opposed to aspherical) optics. We tested the prototype x-ray telescope in the 300 meter vacuum pipe at White Sands Missile Range, NM. The telescope features 2 degree graze angles with tungsten coatings, yielding a bandpass of 0.25-1.5 keV with a peak effective area of 0.8 cm² at 0.83 keV. Results from x-ray testing at energies of 0.25 keV and 0.93 keV (C-K and Cu-L) verify 0.5 arcsecond performance at 0.93 keV. Results from modeling the x-ray telescope's response to the SUn show that the current design would be capable of recording 10 half arcsecond images of a solar active region during a 300 second NASA sounding rocket flight.

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Dennis J. Gallagher, Webster C. Cash, Schuyler Jelsma, and Jason Farmer "Subarcsecond x-ray telescope for imaging the solar corona in the 0.25- to 1.2-keV band", Proc. SPIE 2805, Multilayer and Grazing Incidence X-Ray/EUV Optics III, (19 July 1996); https://doi.org/10.1117/12.245085

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