Radi-N and Radi-N2: Measurements of Neutron Radiation Using Bubble Detectors (2009 – 2020) Доклады на конференциях
Язык | Английский | ||||||||||
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Тип доклада | Устный | ||||||||||
Url доклада | https://wrmiss.org/workshops/twentysixth/ | ||||||||||
Конференция |
26th Workshops on Radiation Monitoring for the International Space Station 05-07 сент. 2023 , Рим |
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Авторы |
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Организации |
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Реферат:
The goal of the Radi-N and Radi-N2 measurements was to characterize the neutron dose equivalent and energy distribution at multiple locations in the US Orbital Segment (USOS) of the International Space Station (ISS) over an extended period of time. The measurements used multiple bubble detectors, which are passive neutron dosimeters based on superheated liquid droplets dispersed in a polymer gel, and an automatic mini reader that counts the bubbles in the detectors. The Radi-N experiments were conducted in 2009 in Columbus, the Japanese Experiment Module, and the US Laboratory. The Radi-N2 measurements began in 2012 in these three ISS modules, later extending to include Node 1, Node 2, Node 3, and the Cupola. For some sessions, one bubble detector was worn by a Canadian astronaut, while a second detector was located in their sleeping quarters. These data provide a comparison of the neutron dose equivalent in the sleeping quarters to that accumulated during daily activities around the ISS.
By the conclusion of the measurements in 2020, 75 week-long sessions had been conducted in the seven USOS locations. In parallel, a similar number of measurements was conducted at various locations in the Russian Orbital Segment of the ISS. The data enable an assessment of the effects of solar activity (and other influence quantities) on the neutron field in the ISS from 2009 to 2020, which corresponds to a full solar cycle. The data suggest that a significant fraction of the neutron dose equivalent is due to neutrons with energy above 15 MeV, which provides motivation for future measurements using a high-energy neutron spectrometer with improved energy resolution.
Библиографическая ссылка:
Smith M.B.
, Andrews H.R.
, Ing H.
, Johnston E.M.
, Khulapko S.
, Koslowsky M.R.
, Machrafi R.
, Nicayenzi B.
, Nikolaev I.
, Norris A.M.
, Romano A.J.
, Shurshakov V.
, Tomi L.
Radi-N and Radi-N2: Measurements of Neutron Radiation Using Bubble Detectors (2009 – 2020)
26th Workshops on Radiation Monitoring for the International Space Station 05-07 Sep 2023
Radi-N and Radi-N2: Measurements of Neutron Radiation Using Bubble Detectors (2009 – 2020)
26th Workshops on Radiation Monitoring for the International Space Station 05-07 Sep 2023