New Capabilities of the EUNIS Sounding Rocket Instrument

Details New Capabilities of the EUNIS Sounding Rocket Instrument New Capabilities of the EUNIS Sounding Rocket Instrument

May 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011spd....42.1502d&link_type=abstract

American Astronomical Society, SPD meeting #42, #15.02; Bulletin of the American Astronomical Society, Vol. 43, 2011

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The upcoming flight of the Extreme Ultraviolet Normal Incidence Spectrograph (EUNIS) sounding rocket instrument, a two-channel imaging spectrograph that observes the solar corona and transition region with high spectral resolution and a rapid cadence made possible by unprecedented sensitivity, will incorporate a new wavelength channel and cooling of the active pixel sensor (APS) arrays. The new 52.4-63.0 nm channel incorporates a Toroidal Varied Line Space (TVLS) grating coated with B4C/Ir, providing broad spectral coverage and a wide temperature range of 0.025 to 10 MK. The APS arrays for both the 52-63 nm and 30-37 nm channels will be cooled to -20 C to reduce dark current noise. With the resulting read-noise limited performance, over a dozen new diagnostic line pairs become available in the two wavelength channels. To our knowledge, this will be the first flight demonstration of cooled APS arrays. EUNIS will co-observe dynamic coronal phenomena with SDO/AIA and Hinode/EIS and will contribute to the absolute radiometric calibrations of these instruments.
EUNIS is supported by NASA through the Low Cost Access to Space Program in Solar and Heliospheric Physics.

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