Photon sieves and the future of EUV imaging spectroscopy
Abstract
Large-aperture photon sieves fabricated at NASA-GSFC can provide diffraction-limited imaging at EUV and X-ray wavelengths, that is, spatial scales down to milli-arcseconds, and are also being used to provide monochromatic, collimated beams for the calibration of solar EUV instruments such as the Extreme Ultraviolet Normal Incidence Spectrograph (EUNIS). EUNIS is a two-channel imaging spectrograph with unprecedented dynamic range and broad spectral coverage (9-11 nm and 52-64 nm), scheduled for a sounding rocket flight in September 2019. This will be the first time the 9-11 nm wavelength range of the Sun has ever been observed by an imaging spectrograph, despite the importance of these short EUV/soft X-ray wavelengths to observing the hottest (>5MK) plasma in the non-flaring atmosphere, which is critical to understanding the energization of the solar corona. Recent results will be presented, and capabilities for future solar EUV missions will be discussed.
- Publication:
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American Astronomical Society Meeting Abstracts #234
- Pub Date:
- June 2019
- Bibcode:
- 2019AAS...23412605D