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- W2765795747 abstract "Bulk elemental composition measurements are difficult to make on the surface of Venus since all of a lander's instruments have to be housed inside a pressure vessel with sufficient thermal control systems to protect the equipment from the harsh surface conditions (462°C, 93 bars pressure) for at least one hour. The Bulk Elemental Composition Analyzer (BECA) instrument combines a Pulsed Neutron Generator (PNG) with a Gamma-Ray Spectrometer (GRS) placed inside a Venus lander pressure vessel. BECA allows the measurement of the bulk elemental composition over a large volume beneath a landed probe (∼30 cm deep, ∼50 cm radius). The combination of a high intensity PNG (emitting 5×108 isotropic neutrons per second) and a scintillator GRS with a fast light-decay time (19 ns for CeBr 3 ) allows for gamma-ray count rates in excess of 2 MHz. This extremely high gamma-ray throughput is necessary to provide the counting statistics needed for the ∼1 hour measurement times currently available for Venus landers. Preliminary results from experimental measurements of a BECA prototype in a surface configuration are presented to show the precision and accuracy possible with BECA." @default.
- W2765795747 created "2017-11-10" @default.
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- W2765795747 date "2016-10-01" @default.
- W2765795747 modified "2023-09-27" @default.
- W2765795747 title "Pulsed neutron generator — gamma ray spectrometer measurements of venus elemental composition" @default.
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- W2765795747 doi "https://doi.org/10.1109/nssmic.2016.8069877" @default.
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