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Astronaut Radiation Protection for Long Duration Missions : = Integrating Passive Radiation Shielding into Space Habitat Design.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Astronaut Radiation Protection for Long Duration Missions :/
其他題名:	Integrating Passive Radiation Shielding into Space Habitat Design.
作者:	Case, Daniel Evan.
面頁冊數:	1 online resource (425 pages)
附註:	Source: Dissertations Abstracts International, Volume: 83-03, Section: B.
Contained By:	Dissertations Abstracts International83-03B.
標題:	Aerospace engineering. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28652321click for full text (PQDT)
ISBN:	9798538120529

Astronaut Radiation Protection for Long Duration Missions : = Integrating Passive Radiation Shielding into Space Habitat Design.
Case, Daniel Evan.

Astronaut Radiation Protection for Long Duration Missions :Integrating Passive Radiation Shielding into Space Habitat Design. - 1 online resource (425 pages)

Source: Dissertations Abstracts International, Volume: 83-03, Section: B.

Thesis (Ph.D.)--University of Colorado at Boulder, 2021.

Includes bibliographical references

Managing space radiation exposure will be one of the central challenges for the future of crewed spaceflight. Currently, for the missions taking place in low Earth orbit (LEO), radiation protection is typically a requirement, but not an engineering design driver, because the missions are relatively short, and there are ample opportunities to rotate the crew before the risks to their health would become unreasonable. In the future, astronauts will be expected to travel farther away and for longer periods of time, which will not only change the quality and duration of their exposure, but depending on the mission architecture, may also limit or preclude any opportunities to rotate the crew. The current approach for managing space radiation exposure in LEO relies heavily on passive radiation shielding and operational safety, although it also leverages modeling and simulation tools wherever feasible, and uses some limited personalized risk assessments. However, that approach may prove to be insufficient for certain exploration-class missions where the expected stringency of the requirements has the potential to bring radiation exposure management to the forefront of engineering design. To that end, this doctoral work is divided into two parts: radiation exposure management at the system level, and radiation protection at the technology level. At a system level, this dissertation provides an overview of nine different exposure management strategies, including descriptions of how they work, when they might be applicable, and how they could be implemented. Additionally, this research advocates for treating radiation exposure management as a distinct subsystem, in order to give it the visibility and influence that would be appropriate for an engineering design driver. The last component of the system-level research is to investigate the use of a systems engineering framework for designing the exposure management subsystem, which ultimately serves to build a cohesive strategy that treats radiation exposure management as a system of subsystems. At a technology level, this dissertation takes a closer look at passive radiation shielding by conducting two sensitivity analyses of shielding efficacy against galactic cosmic rays (GCRs), using the National Aeronautics and Space Administration's (NASA's) On-Line Tool for the Assessment of Radiation In Space (OLTARIS). The first analysis explores the shielding efficacy of layered systems of aluminum and polyethylene, which is helpful for identifying big-picture lessons about integrating hydrogen-rich passive shielding into space habitat design. The second analysis explores the shielding efficacy of spacecraft window materials, which offers insight into how window placement affects astronaut radiation exposure.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2023

Mode of access: World Wide Web

ISBN: 9798538120529Subjects--Topical Terms:

1002622
Aerospace engineering.
Subjects--Index Terms:

BioastronauticsIndex Terms--Genre/Form:

542853
Electronic books.

Astronaut Radiation Protection for Long Duration Missions : = Integrating Passive Radiation Shielding into Space Habitat Design.
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