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  • 1
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    X ray imaging microscope for cancer research (1991)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The NASA technology employed during the Stanford MSFC LLNL Rocket X Ray Spectroheliograph flight established that doubly reflecting, normal incidence multilayer optics can be designed, fabricated, and used for high resolution x ray imaging of the Sun. Technology developed as part of the MSFC X Ray Microscope program, showed that high quality, high resolution multilayer x ray imaging microscopes are feasible. Using technology developed at Stanford University and at the DOE Lawrence Livermore National Laboratory (LLNL), Troy W. Barbee, Jr. has fabricated multilayer coatings with near theoretical reflectivities and perfect bandpass matching for a new rocket borne solar observatory, the Multi-Spectral Solar Telescope Array (MSSTA). Advanced Flow Polishing has provided multilayer mirror substrates with sub-angstrom (rms) smoothnesss for the astronomical x ray telescopes and x ray microscopes. The combination of these important technological advancements has paved the way for the development of a Water Window Imaging X Ray Microscope for cancer research.
    Keywords: AEROSPACE MEDICINE
    Type: National Aeronautics and Space Administration, Technology 2000, Volume 1; p 73-82
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Design and Fabrication of the All-Reflecting H-Lyman alpha Coronagraph/Polarimeter (1993)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: We have designed, analyzed, and are now fabricating an All-Reflecting H-Lyman alpha Coronagraph/Polarimeter for solar research. This new instrument operates in a narrow bandpass centered at lambda 1215.7 A-the neutral hydrogen Lyman alpha (Ly-alpha) line. It is shorter and faster than the telescope which produced solar Ly-alpha images as a part of the MSSTA payload that was launched on May 13, 1991. The Ly-alpha line is produced and linearly polarized in the solar corona by resonance scattering, and the presence of a magnetic field modifies this polarization according to the Hanle effect. The Lyman alpha Coronagraph/Polarimeter instrument has been designed to measure coronal magnetic fields by interpreting, via the Hanle effect, the measured linear polarization of the coronal Ly-alpha line. Ultrasmooth mirrors, polarizers, and filters are being flow-polished for this instrument from CVD silicon carbide substrates. These optical components will be coated using advanced induced transmission and absorption thin film multilayer coatings, to optimize the reflectivity and polarization properties at 1215.7 A. We describe some of the solar imaging results obtained with the MSSTA Lyman alpha coronagraph. We also discuss the optical design parameters and fabrication plans for the All-Reflecting H-Lyman alpha Coronagraph/Polarimeter.
    Keywords: Optics
    Type: NASA/TM-1992-113081 , NAS 1.15:113081 , Multilayer and Grazing Incidence X-ray/EUV Optics for Astronomy and Projection Lithography; Jul 19, 1992 - Jul 22, 1992; San Diego, CA; United States|International Society for Optical Engineering; 1742; 439-452
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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