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A Passive Magnetoelastic Radiation Sensor
A passive gamma detection technology, consisting of a fielded sensor and a separate analysis system, is described. The sensor is a small cylinder, about 2.5 mm in diameter and 15 mm in length. It requires no onboard power sources or physical connections for power or data transfer, and retains its cu...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6891336/ https://www.ncbi.nlm.nih.gov/pubmed/31739491 http://dx.doi.org/10.3390/s19224959 |
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author | Lamberti, Vincent Mee, David Angelo, Peter Preston, Jeffrey |
author_facet | Lamberti, Vincent Mee, David Angelo, Peter Preston, Jeffrey |
author_sort | Lamberti, Vincent |
collection | PubMed |
description | A passive gamma detection technology, consisting of a fielded sensor and a separate analysis system, is described. The sensor is a small cylinder, about 2.5 mm in diameter and 15 mm in length. It requires no onboard power sources or physical connections for power or data transfer, and retains its cumulative response to radiation. The sensor consists of an amorphous magnetoelastic wire held in a longitudinally-stressed state by a radiation-sensitive material. When the radiation-sensitive material is subjected to gamma radiation, it mechanically degrades, relaxing the stress on the wire and lowering the wire’s magnetic permeability. The changes in permeability are observed by switching the magnetic domains in the wire and measuring the reduction in the Faraday voltage as the stress is diminished. The analysis package is built around an excitation-detection coil set and can communicate wirelessly with the sensor through a metallic or nonmetallic barrier at distances up to about 25 mm. The sensor response is linear up to a dose of at least 7 kGy. |
format | Online Article Text |
id | pubmed-6891336 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-68913362019-12-12 A Passive Magnetoelastic Radiation Sensor Lamberti, Vincent Mee, David Angelo, Peter Preston, Jeffrey Sensors (Basel) Article A passive gamma detection technology, consisting of a fielded sensor and a separate analysis system, is described. The sensor is a small cylinder, about 2.5 mm in diameter and 15 mm in length. It requires no onboard power sources or physical connections for power or data transfer, and retains its cumulative response to radiation. The sensor consists of an amorphous magnetoelastic wire held in a longitudinally-stressed state by a radiation-sensitive material. When the radiation-sensitive material is subjected to gamma radiation, it mechanically degrades, relaxing the stress on the wire and lowering the wire’s magnetic permeability. The changes in permeability are observed by switching the magnetic domains in the wire and measuring the reduction in the Faraday voltage as the stress is diminished. The analysis package is built around an excitation-detection coil set and can communicate wirelessly with the sensor through a metallic or nonmetallic barrier at distances up to about 25 mm. The sensor response is linear up to a dose of at least 7 kGy. MDPI 2019-11-14 /pmc/articles/PMC6891336/ /pubmed/31739491 http://dx.doi.org/10.3390/s19224959 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Lamberti, Vincent Mee, David Angelo, Peter Preston, Jeffrey A Passive Magnetoelastic Radiation Sensor |
title | A Passive Magnetoelastic Radiation Sensor |
title_full | A Passive Magnetoelastic Radiation Sensor |
title_fullStr | A Passive Magnetoelastic Radiation Sensor |
title_full_unstemmed | A Passive Magnetoelastic Radiation Sensor |
title_short | A Passive Magnetoelastic Radiation Sensor |
title_sort | passive magnetoelastic radiation sensor |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6891336/ https://www.ncbi.nlm.nih.gov/pubmed/31739491 http://dx.doi.org/10.3390/s19224959 |
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