Further Development of Aperture: A Precise Extremely large Reflective Telescope Using Re-configurable Elements

Metadata Updated: November 12, 2020

One of the pressing needs for space ultraviolet-visible astronomy is a design to allow larger mirrors than the James Webb Space Telescope primary. The diameter of the rocket fairing limits the mirror diameter such that all future missions calling for mirrors up to 16 m in diameter or larger will require a mirror that is deployed post-launch. In response to the deployment requirement, we address the issues of this concept called "A Precise Extremely large Reflective Telescope Using Reconfigurable Elements (APERTURE) with both hardware experiments and software simulations. APERTURE will use a deployable membrane-like mirror. The mirror figure will be corrected after deployment to bring it into better or equal lambda/20 deviations from the prescribed mirror shape, where lambda (typically 400 nm-1 micron) is the operational wavelength. Instead of using the classical piezoelectric-patch technology, our concept is based on a continuous coating of a Magnetic Smart Material (MSM). We expect that the initially deployed mirror will not have a perfect figure. Thus our design uses magnetic write heads to produce stress in the MSM and improve the figure, post deployment. This Phase II NIAC proposal is to address two of the tall poles in the concept: (a) Can corrections on a large size be made and retained for a long enough time (> 1 week); (b) Can deployment be done in such a way that the figures corrections are small enough to be correctable via the MSM plus magnetic field, and at the same time, the in plane stresses as small enough to allow the stresses resulting magnetic field injected into the MSM plus magnetic fields to make the necessary corrections. Tall pole “a” will be primarily the responsibility of Northwestern University (NU) and “b” of University of Illinois Urbana-Champaign. NU will carry out overall scientific leadership and will coordinate and solicit input from GSFC, JPL, and NIST.

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Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020

Metadata Source

Harvested from NASA Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020
Publisher Space Technology Mission Directorate
Unique Identifier Unknown
Identifier TECHPORT_89020
Data First Published 2018-06-01
Data Last Modified 2020-01-29
Public Access Level public
Bureau Code 026:00
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Metadata Catalog ID https://data.nasa.gov/data.json
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Homepage URL https://techport.nasa.gov/view/89020
Program Code 026:027
Source Datajson Identifier True
Source Hash 4fd6359be8669c4b6b7d698200b406e5b9060ae9
Source Schema Version 1.1

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