Experimental Studies on Shadow Shields for Thermal Protection of Cryogenic Tanks in Space PDF Download
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Author: Richard H. Knoll
Publisher:
ISBN:
Category : Space vehicles
Languages : en
Pages : 76
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Book Description
Experiments were performed on multiple flat-disk shadow shields to determine the effects of shield spacing number, emissivity, lateral conductance, and targeting (high-emissivity coatings on annular rings of shields) on thermal performance. The experimental data, in general, agreed closely with an analytical model which assumed diffuse surfaces with nonuniform radiosity. A shadow-shield system for a hypothetical space vehicle was designed, scaled down, and tested. Results demonstrated: (1) a lightweight method of shield construction; (2) shield-support interactions: and (3) reduction of support heat leaks by shield location, attachment methods, and the use of high-emissivity coatings.
Author: Richard H. Knoll
Publisher:
ISBN:
Category : Space vehicles
Languages : en
Pages : 76
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Book Description
Experiments were performed on multiple flat-disk shadow shields to determine the effects of shield spacing number, emissivity, lateral conductance, and targeting (high-emissivity coatings on annular rings of shields) on thermal performance. The experimental data, in general, agreed closely with an analytical model which assumed diffuse surfaces with nonuniform radiosity. A shadow-shield system for a hypothetical space vehicle was designed, scaled down, and tested. Results demonstrated: (1) a lightweight method of shield construction; (2) shield-support interactions: and (3) reduction of support heat leaks by shield location, attachment methods, and the use of high-emissivity coatings.
Author: Robert Fosbinder
Publisher: Lippincott Williams & Wilkins
ISBN: 078177554X
Category : Medical
Languages : en
Pages : 392
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Book Description
Lippincott Williams & Wilkins is proud to introduce Essentials of Radiologic Science, the nucleus of excellence for your radiologic technology curriculum! An exciting new first edition, this core, comprehensive textbook for radiologic technology students focuses on the crucial components and minimizing extraneous content. This text will help prepare students for success on the American Registry of Radiologic Technologists Examination in Radiography and beyond into practice. Topics covered include radiation protection, equipment operation and quality control, image production and evaluation, and patient care. This is a key and crucial resource for radiologic technology programs, focusing on the most relevant information and offering tools and resources to students of multiple learning types. These include a full suite of ancillary products, a variety of pedagogical features embedded in the text, and a strong focus on the practical application of the concepts presented.
Author: U.S. Atomic Energy Commission
Publisher:
ISBN:
Category : Shielding (Radiation)
Languages : en
Pages : 112
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Book Description
Included are 687 selected references to unclassified reports and scientific journal literature on radiation shields and shielding. Author, report number, and subject indexes are also included.
Author:
Publisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 52
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 920
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Book Description
Author: E. Czapek
Publisher:
ISBN:
Category : Gamma rays
Languages : en
Pages : 152
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Book Description
Author: United States. Bureau of Radiological Health
Publisher:
ISBN:
Category : Diagnosis, Radioscopic
Languages : en
Pages : 28
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Book Description
Author: Richard L. DeWitt
Publisher:
ISBN:
Category :
Languages : en
Pages : 116
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Book Description
Author: George R. Smolak
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 100
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Book Description
Analytical techniques are presented that permit the calculation of heat-transfer rates with various thermal-protection systems for liquid-cryogenic-propellant tanks subjected to on-board, solar, and planetary heat fluxes. The effectiveness of these protection systems in reducing propellant heating is shown both for ideal heat-transfer models and for a simplified hydrogen-oxygen terminal state used for typical Mars missions.
Author: Mary Alice Statkiewicz Sherer
Publisher: Elsevier Health Sciences
ISBN: 0323172202
Category : Medical
Languages : en
Pages : 403
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Book Description
A full-color resource, Radiation Protection in Medical Radiography, 7th Edition makes it easy to understand both basic and complex concepts in radiation protection, biology, and physics. Concise coverage promotes the safe use of ionizing radiation in all imaging modalities, including the effects of radiation on humans at the cellular and systemic levels, regulatory and advisory limits for human exposure to radiation, and the implementation of radiation safety practices for patients and personnel. This edition includes NEW content on the impact of radiation levels during the nuclear power plant crisis that followed the 2011 earthquake/tsunami in Japan. From an author team led by well-known radiation protection expert Mary Alice Statkiewicz Sherer, this text has consistently helped students perform well on the ARRT exam! "...well written and easy to comprehend". Reviewed by Kirsten Farrell on behalf of RAD Magazine, March 2015 Full-color illustrations reinforce important information. Convenient, easy-to-use features include chapter outlines and objectives, highlighting of key terms, and bulleted summaries and review questions to enhance comprehension and retention. Clear and concise writing style covers complex concepts in radiation protection, biology, and physics in a building-block approach from basic to more complex concepts. Review questions are included at the end of chapters to assess your comprehension, with answers on the Evolve companion website. Coverage of historical radiological disasters includes photos and text on Hiroshoma, Chernobyl, and Three-Mile Island. UPDATED! NCRP and ICRP content includes guidelines, regulations, and radiation quantities and units, explaining the effects of low-level ionizing radiation, demonstrating the link between radiation and cancer and other diseases, and providing the regulatory perspective needed for practice. NEW! Discussion of Total Effective Dose Equivalent (TEDE) covers the radiation dosimetry quantity defined by the U.S. Nuclear Regulatory Commission to monitor and control human exposure to ionizing radiation. NEW! Coverage of the Fukushima Daiichi Nuclear Plant Crisis addresses the impact of radiation levels following Japan's earthquake/tsunami in March 2011. NEW! TRACE section covers the Tools for Radiation Awareness and Community Education program, a two-phase approach to radiation dose awareness and overall patient dose reduction through a joint venture of AHRA and Toshiba's Putting Patients First. NEW! Discussion of the FDA white paper: Initiative to Reduce Unnecessary Exposure from Medical Imaging promotes the safe use of medical imaging devices, supports informed clinical decision making, and leads to increased patient awareness.
