LENA Conversion Foils Using Single-Layer Graphene, Phase II

Metadata Updated: November 12, 2020

Implementing graphene foils in existing neutral atom detector designs will increase their angular and energy resolution, and also improve their mass discrimination and usable energy range. Graphene atomic uniformity and low mass density offer natural advantages over amorphous carbon foils in time-of-flight instruments. We expect that Phase II will yield flight-ready prototype foils available for rocket or pathfinder missions with substantial improvements in instrument performance. Graphene foils can also enable improved designs, for instance with lower mass or lower power consumption. Graphene is potentially useful in very low energy neutral atom detection, e.g. E4cm2) -SLG on nanohole arrays with hole coverage of >99%
-a method for attaching single-layer graphene to mesh without adhesive
-bilayer graphene membranes with >95% coverage on commercial mesh -Lyman alpha blocking of 99.8% using aluminum nanohole arrays Our Phase II effort will continue to improve microgrids, nanogrids and graphene for LENA detectors. In particular, we will 1. Fabricate bilayer graphene (BLG) on microgrids as a better-performing foil for existing LENA instrument designs.
2. Fabricate pristine SLG on nanogrids, extending TOF detectors to <200eV.
3. Investigate surface modification of graphene to enable detection of <10eV neutral atoms. 4. Make prototype samples for other NASA and non-NASA applications. Compared with existing foils, our proposed SLG structure reduces scattering, improves low energy signal, and improves energy resolution. The structure reduces the serial losses and increases the effective collection area.

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

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Harvested from NASA Data.json

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Resource Type Dataset
Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020
Publisher Space Technology Mission Directorate
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Identifier TECHPORT_93592
Data First Published 2019-04-01
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/93592
Program Code 026:027
Source Datajson Identifier True
Source Hash 4e74a6cf249f0bd179a4d836064f49a17bc7b7d7
Source Schema Version 1.1

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