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Raymond J. Sedwick and James A. Bickford. Zayas, Daniel Antonio Massachusetts Institute of Technology. Dept. of Aeronautics and Astronautics. Massachusetts Institute of Technology. Department of Aeronautics and Astronautics 2009-04-29T17:13:57Z 2009-04-29T17:13:57Z 2008 2008 http://hdl.handle.net/1721.1/45242 309350315 Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2008. Includes bibliographical references (p. 85-87). A novel concept for the extraction and long-term trapping of antiprotons from planetary magnetospheres is developed. The excitation via rotating magnetic field of an electron population within a distributed neutral plasma is shown to produce a large-scale magnetic field approximating a dipole with r-² or slower decay. These shallow field gradients are, in turn, found to suppress the natural tendency of the magnetic dipole field to shield against incident particle fluxes. Particle transport and plasma interaction models are developed and used to compare collection performance against various electrostatic and magnetostatic collection systems. Baseline system architectures are presented, and antiproton collection rates on the order of nanograms per day are estimated, far exceeding current Earth-based production rates. To demonstrate the performance potential of antiproton fuels for spacecraft propulsion, a modified rocket equation with relativistic corrections and variable mass-energy conversion efficiency is derived. Antimatter engines operating via the catalysis of nuclear fission in a fissile material by antiprotons are found to be three to four (3 - 4) times more efficient than traditional proton-antiproton annihilation or "beam-core" engines, and vastly more efficient than conventional chemical and electric propulsion systems. Baseline architectures for various missions are presented. by Daniel Antonio Zayas. S.M. 87 p. eng Massachusetts Institute of Technology M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 Aeronautics and Astronautics. Electromagnetic extraction and annihilation of antiprotons for spacecraft propulsion Thesis application/pdf false Publication unknown unknown <Publication xmlns="https://www.openaire.eu/cerif-profile/1.1/" id="1bfe57fe-15fa-43df-bd5a-a2fbc20eaea7"> <Type xmlns="https://www.openaire.eu/cerif-profile/vocab/COAR_Publication_Types">http://purl.org/coar/resource_type/c_1843</Type> <Language>eng</Language> <Title>Electromagnetic extraction and annihilation of antiprotons for spacecraft propulsion</Title> <PublishedIn> <Publication> </Publication> </PublishedIn> <PublicationDate>2008</PublicationDate> <Authors> <Author> <DisplayName>Zayas, Daniel Antonio</DisplayName> <Affiliation> <OrgUnit> </OrgUnit> </Affiliation> </Author> </Authors> <Editors> </Editors> <Publishers> <Publisher> <DisplayName>Massachusetts Institute of Technology</DisplayName> <OrgUnit /> </Publisher> </Publishers> <License>http://dspace.mit.edu/handle/1721.1/7582</License> <Keyword>Aeronautics and Astronautics.</Keyword> <Abstract>A novel concept for the extraction and long-term trapping of antiprotons from planetary magnetospheres is developed. The excitation via rotating magnetic field of an electron population within a distributed neutral plasma is shown to produce a large-scale magnetic field approximating a dipole with r-² or slower decay. These shallow field gradients are, in turn, found to suppress the natural tendency of the magnetic dipole field to shield against incident particle fluxes. Particle transport and plasma interaction models are developed and used to compare collection performance against various electrostatic and magnetostatic collection systems. Baseline system architectures are presented, and antiproton collection rates on the order of nanograms per day are estimated, far exceeding current Earth-based production rates. To demonstrate the performance potential of antiproton fuels for spacecraft propulsion, a modified rocket equation with relativistic corrections and variable mass-energy conversion efficiency is derived. Antimatter engines operating via the catalysis of nuclear fission in a fissile material by antiprotons are found to be three to four (3 - 4) times more efficient than traditional proton-antiproton annihilation or &quot;beam-core&quot; engines, and vastly more efficient than conventional chemical and electric propulsion systems. Baseline architectures for various missions are presented.</Abstract> <Access xmlns="http://purl.org/coar/access_right" > </Access> </Publication>