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Influence of the Multi-Mission Radioisotope Thermoelectric Generator (MMRTG) on the local atmospheric environment

A survey around a recently-fueled MMRTG in the terrestrial atmosphere finds a warm air plume with a characteristic updraft velocity of ~1 m/s and a temperature rise of ~4 ​K. Additionally, a roughly hundredfold enhancement in ion density to ~70,000/cm(3) in the vicinity (<~1 ​m) of the generator...

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Detalles Bibliográficos
Autores principales: Lorenz, Ralph D., Clarke, Eric S.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier Ltd. 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7458055/
https://www.ncbi.nlm.nih.gov/pubmed/32904654
http://dx.doi.org/10.1016/j.pss.2020.105075
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author Lorenz, Ralph D.
Clarke, Eric S.
author_facet Lorenz, Ralph D.
Clarke, Eric S.
author_sort Lorenz, Ralph D.
collection PubMed
description A survey around a recently-fueled MMRTG in the terrestrial atmosphere finds a warm air plume with a characteristic updraft velocity of ~1 m/s and a temperature rise of ~4 ​K. Additionally, a roughly hundredfold enhancement in ion density to ~70,000/cm(3) in the vicinity (<~1 ​m) of the generator was observed: air electrical conductivity was measured to be ~10(−13) ​S/m. No evidence of ozone production was detected. These observations inform the electrical charging environment and possible local perturbation to meteorological measurements on Mars or Titan on MMRTG-powered landers or rovers. On Mars, the effects of any electrical conductivity enhancement are likely small, but on Titan they may be significant.
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spelling pubmed-74580552020-09-01 Influence of the Multi-Mission Radioisotope Thermoelectric Generator (MMRTG) on the local atmospheric environment Lorenz, Ralph D. Clarke, Eric S. Planet Space Sci Article A survey around a recently-fueled MMRTG in the terrestrial atmosphere finds a warm air plume with a characteristic updraft velocity of ~1 m/s and a temperature rise of ~4 ​K. Additionally, a roughly hundredfold enhancement in ion density to ~70,000/cm(3) in the vicinity (<~1 ​m) of the generator was observed: air electrical conductivity was measured to be ~10(−13) ​S/m. No evidence of ozone production was detected. These observations inform the electrical charging environment and possible local perturbation to meteorological measurements on Mars or Titan on MMRTG-powered landers or rovers. On Mars, the effects of any electrical conductivity enhancement are likely small, but on Titan they may be significant. Elsevier Ltd. 2020-11-15 2020-08-31 /pmc/articles/PMC7458055/ /pubmed/32904654 http://dx.doi.org/10.1016/j.pss.2020.105075 Text en © 2020 Elsevier Ltd. All rights reserved. Since January 2020 Elsevier has created a COVID-19 resource centre with free information in English and Mandarin on the novel coronavirus COVID-19. The COVID-19 resource centre is hosted on Elsevier Connect, the company's public news and information website. Elsevier hereby grants permission to make all its COVID-19-related research that is available on the COVID-19 resource centre - including this research content - immediately available in PubMed Central and other publicly funded repositories, such as the WHO COVID database with rights for unrestricted research re-use and analyses in any form or by any means with acknowledgement of the original source. These permissions are granted for free by Elsevier for as long as the COVID-19 resource centre remains active.
spellingShingle Article
Lorenz, Ralph D.
Clarke, Eric S.
Influence of the Multi-Mission Radioisotope Thermoelectric Generator (MMRTG) on the local atmospheric environment
title Influence of the Multi-Mission Radioisotope Thermoelectric Generator (MMRTG) on the local atmospheric environment
title_full Influence of the Multi-Mission Radioisotope Thermoelectric Generator (MMRTG) on the local atmospheric environment
title_fullStr Influence of the Multi-Mission Radioisotope Thermoelectric Generator (MMRTG) on the local atmospheric environment
title_full_unstemmed Influence of the Multi-Mission Radioisotope Thermoelectric Generator (MMRTG) on the local atmospheric environment
title_short Influence of the Multi-Mission Radioisotope Thermoelectric Generator (MMRTG) on the local atmospheric environment
title_sort influence of the multi-mission radioisotope thermoelectric generator (mmrtg) on the local atmospheric environment
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7458055/
https://www.ncbi.nlm.nih.gov/pubmed/32904654
http://dx.doi.org/10.1016/j.pss.2020.105075
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