Download or read book Scoping Estimates of the Ldef Satellite Induced Radioactivity written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-16 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Long Duration Exposure Facility (LDEF) satellite was recovered after almost six years in space. It was well-instrumented with ionizing radiation dosimeters, including thermoluminescent dosimeters, plastic nuclear track detectors, and a variety of metal foil samples for measuring nuclear activation products. The extensive LDEF radiation measurements provide the type of radiation environments and effects data needed to evaluate and help resolve uncertainties in present radiation models and calculational methods. A calculational program was established to aid in LDEF data interpretation and to utilize LDEF data for assessing the accuracy of current models. A summary of the calculational approach is presented. The purpose of the reported calculations is to obtain a general indication of: (1) the importance of different space radiation sources (trapped, galactic, and albedo protons, and albedo neutrons); (2) the importance of secondary particles; and (3) the spatial dependence of the radiation environments and effects expected within the spacecraft. The calculational method uses the High Energy Transport Code (HETC) to estimate the importance of different sources and secondary particles in terms of fluence, absorbed dose in tissue and silicon, and induced radioactivity as a function of depth in aluminum. Armstrong, Tony W. and Colborn, B. L. Unspecified Center...
Download or read book LDEF A Bibliography with Abstracts written by and published by . This book was released on 1992 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book LDEF 69 Months in Space First Post Retrieval Symposium Part 1 written by and published by . This book was released on 1992 with total page 636 pages. Available in PDF, EPUB and Kindle. Book excerpt: LDEF was carried into orbit in April 1984 by the Space Shuttle Challenger. The 11-ton satellite contained 57 experiments to assess the effects of the space environment, i.e., ionizing radiation, meteoroids, cosmic dust, and high altitude atomic oxygen on materials and mechanical, electronic, optical, and living systems. In January 1990, after 69 months in low Earth orbit, LDEF was retrieved by the Space Shuttle Columbia and returned to Earth. The retrieval occurred 57 months after it was originally planned, due in part to the Challenger tragedy. The 69 months in space provided experimenters the unique opportunity to sample and measure the space environment over a longer time period than originally planned. The 57 LDEF experiments were returned to the Principal Investigators and their science teams for analyses and interpretation. In June 1991, over 400 LDEF researchers and data users met in Kissimmee, Florida for the First LDEF Post-Retrieval Symposium. The papers presented contained important new information about space environments and their impact on materials, systems, and biology.
Download or read book LDEF 69 Months in Space Third Post Retrieval Symposium Part 1 written by and published by . This book was released on 1995 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book LDEF Experiment P0006 Linear Energy Transfer Spectrum Measurement LETSME Quick Look Report written by and published by DIANE Publishing. This book was released on with total page 49 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book LDEF Materials Workshop 91 written by and published by . This book was released on 1992 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA Conference Publication written by and published by . This book was released on 1993 with total page 574 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Interim Overview of LDEF Materials Findings written by and published by . This book was released on 1992 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analysis of Systems Hardware Flown on LDEF Results of the Systems Special Investigation Group written by Harry W. Dursch and published by . This book was released on 1992 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: Discussed here is the status of the Long Duration Exposure Facility (LDEF) Systems Special Investigation Group (Systems SIG) investigation through the end of 1991.
Download or read book LDEF 69 Months in Space Part 4 Second Post Retrieval Symposium written by and published by . This book was released on 1993 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book LDEF Materials Workshop 1991 Part 1 written by and published by . This book was released on 1992 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Small Satellite Technologies and Applications II written by Brian J. Horais and published by . This book was released on 1992 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book 1990 IEEE Nuclear Science Symposium Conference Record written by and published by . This book was released on 1990 with total page 848 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book IEEE Nuclear Science Symposium Conference Record written by and published by . This book was released on 1990 with total page 850 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Space Environmental Effects on Spacecraft LEO Materials Selection Guide Part 1 written by and published by . This book was released on 1995 with total page 514 pages. Available in PDF, EPUB and Kindle. Book excerpt:
