Rocket flight of a multilayer coated high-density EUV toroidal grating

Details Rocket flight of a multilayer coated high-density EUV toroidal grating Rocket flight of a multilayer coated high-density EUV toroidal grating

Jan 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992spie.1546..614k&link_type=abstract

In: Multilayer and grazing incidence X-ray/EUV optics; Proceedings of the Meeting, San Diego, CA, July 22-24, 1991 (A93-39658 15

Physics

Optics

3

Extreme Ultraviolet Radiation, Gratings (Spectra), Laminates, Rocket-Borne Instruments, Spaceborne Telescopes, Rocket Flight, Solar Instruments, Surface Geometry

Scientific paper

A multilayer coated high density toroidal grating was flown on a sounding rocket experiment in the Solar EUV Rocket Telescope and Spectrograph (SERTS) instrument. To our knowledge this is the first space flight of a multilayer coated grating. Pre-flight performance evaluation showed that the application of a 10-layer Ir/Si multilayer coating to the 3600 l/mm blazed toroidal replica grating produced a factor of 9 enhancement in peak efficiency near the design wavelength around 30 nm in first order over the standard gold coating, with a measured EUV efficiency that peaked at 3.3 percent. In addition, the grating's spectral resolution of better than 5000 was maintained. The region of enhanced grating efficiency due to the multilayer coating is clearly evident in the flight data. Within the bandpass of the multilayer coating, the recorded film densities were roughly equivalent to those obtained with a factor of six longer exposure on the previous flight of the SERTS instrument.

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