A Radiation Nose for monitoring radiation in space missions

Metadata Updated: May 2, 2019

This project developed a radiation monitoring system using conventional silicon CMOS (complementary metal oxide semiconductor) chip except by replacing the silicon dioxide dielectric with a liquid dielectric. Radiation detectors should be capable of discriminating various radiation sources at room temperature with a good energy resolution and amenable to different platforms such as handheld, benchtop, and portals for ports and airports. Current technologies including 3He detectors, scintillators, and solid-state detectors are bulky and expensive.  We developed a new radiation detection method and architecture. Some liquids react to radiation exposure with a change in molecular structure, leading to a change in properties such as dielectric constant and polarization. Inspired by such responsivity of liquids, we  constructed a transistor with a radiation-responsive liquid as a gate dielectric replacing the conventional oxide gate layer. The current voltage characteristics of the liquid gate dielectric transistor  change upon exposure to any type of radiation. Different types of liquids that specifically interact with various target radiations can be used in an array of transistors serving as a radiation nose to discriminate different radiation sources. Moreover, the fluidity of the liquid facilitates the exchange of the damaged liquid with fresh liquid after some time, allowing a reusable sensor. Selection of liquid-state gate dielectric is important for an acceptable device performance, and the choice should satisfy the following requirements: insulating properties, proper dielectric constant, dielectric strength, thermal stability, high purity, low moisture absorption, low viscosity, and responsive to radiation. Preliminary results from this project include detection of gamma radiation.  Future work would include development of a radiation nose capable of detecting multiple types of radiation with energy discrimination.

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Public: This dataset is intended for public access and use. License: U.S. Government Work

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Metadata Created Date August 1, 2018
Metadata Updated Date May 2, 2019

Metadata Source

Harvested from NASA Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date August 1, 2018
Metadata Updated Date May 2, 2019
Publisher Space Technology Mission Directorate
Unique Identifier TECHPORT_10642
Maintainer Email
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
Datagov Dedupe Retained 20190501230127
Harvest Object Id f451095d-5d06-4103-a5ed-50edc5ad14b2
Harvest Source Id 39e4ad2a-47ca-4507-8258-852babd0fd99
Harvest Source Title NASA Data.json
Data First Published 2012-01-01
Homepage URL https://techport.nasa.gov/view/10642
License http://www.usa.gov/publicdomain/label/1.0/
Data Last Modified 2018-07-19
Program Code 026:027
Source Datajson Identifier True
Source Hash a1e9ee3f697447a71a9915ca11618c62f47d2c8a
Source Schema Version 1.1

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