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A Submm-Wave Comet Explorer for Water Isotopic Composition Measurements

Show simple item record Mehdi, Imran Von Allmen, Paul Kooi, Jacob Choukroun, Mathieu Goldsmith, Paul F. Hayton, Darren Bumble, Bruce Echternach, Pierre Feldman, Sabrina 2020-05-12T17:15:44Z 2020-05-12T17:15:44Z 2018-06-12
dc.identifier.citation SPIE Astronomical Telescopes + Instrumentation, Austin, Texas, June 12 - 14, 2018 en_US
dc.identifier.clearanceno 18-2865
dc.description.abstract Remote submm-wave spectrometers have the capability of providing statistically significant numbers of isotopic composition measurements within the budget constraints of available planetary missions. This talk will present a mission and instrument concept that would enable an accurate measurement of the D/H ratio on not one but several dozens of comets in a four-year mission lifetime. The instrument would utilize advanced cryogenic detectors that would allow us to measure the abundance of the para and ortho spin states of water and its isotopologues. State of the art superconducting heterodyne receivers have been developed that provide detection sensitivities approaching the quantum limit in the 500 GHz frequency range enabling the measurement of D/H ratio on around 50 comets from an observatory stationed for example at the thermally benign Lagrange point L2. en_US
dc.description.sponsorship NASA/JPL en_US
dc.language.iso en_US en_US
dc.publisher Pasadena, CA: Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2018 en_US
dc.subject water isotopic ratio en_US
dc.subject D/H ratio en_US
dc.subject comet water isotopic ratio en_US
dc.subject SIS technology en_US
dc.subject heterodyne receivers en_US
dc.subject superconductive detectors en_US
dc.title A Submm-Wave Comet Explorer for Water Isotopic Composition Measurements en_US
dc.type Preprint en_US

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