The grating elements for the AXAF-Low Energy Transmission Grating Spectrometer

Details The grating elements for the AXAF-Low Energy Transmission Grating Spectrometer The grating elements for the AXAF-Low Energy Transmission Grating Spectrometer

Oct 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992spie.1743..475p&link_type=abstract

In: EUV, X-ray, and gamma-ray instrumentation for astronomy III; Proceedings of the Meeting, San Diego, CA, July 22-24, 1992 (A9

Computer Science

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1

Fabrication, Gratings (Spectra), Optical Properties, X Ray Astronomy, Design Analysis, Performance Prediction, Spacecraft Launching

Scientific paper

The developers of the transmission grating elements of AXAF's Low Energy Transmission Grating (LETG) have given special attention to their optical quality, which must match the high angular resolution of the AXAF telescope. The variations of the period over the grating area and among different elements are less than 0.025 percent rms; the bar-width is half of the grating period, within 50-nm tolerances, for the suppression of the even-order intensities.

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