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Record 9 of 251
Technical Considerations for Advanced Propulsion Systems
Author and Affiliation:
Houts, Michael G.(NASA Marshall Space Flight Center, Huntsville, AL United States)
Abstract: This presentation reviews concerns involving advanced propulsion systems. The problems involved with the use of Am-242m, is that it has a high "eta" plus an order of magnitude larger fission cross section than other fissionable materials, and that it is extremely rare. However other americium isotopes are much more common, but extremely effective isotopic separation is required. Deuterium-Tritium fusion is also not attractive for space propulsion applications. Because the pulsed systems cannot breed adequate amounts of tritium and it is difficult and expensive to bring tritium from Earth. The systems that do breed tritium have severely limited performance. However, other fusion processes should still be evaluated. Another problem with advanced propellants is that inefficiencies in converting the total energy generated into propellant energy can lead to tremendous heat rejection requirements. Therefore Many. advanced propulsion concepts benefit greatly from low-mass radiators.
Publication Date: Jan 01, 1999
Document ID:
19990063724
(Acquired Sep 03, 1999)
Subject Category: SPACECRAFT PROPULSION AND POWER
Document Type: Reprint
Meeting Information: 10th; 5-8 Apr. 1999; Huntsville, AL; United States
Meeting Sponsor: NASA; Washington, DC United States
Jet Propulsion Lab., California Inst. of Tech.; Pasadena, CA United States
NASA Marshall Space Flight Center; Huntsville, AL United States
American Inst. of Aeronautics and Astronautics; Washington, DC United States
Financial Sponsor: NASA Marshall Space Flight Center; Huntsville, AL United States
Organization Source: NASA Marshall Space Flight Center; Huntsville, AL United States
Description: In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: FISSIONABLE MATERIALS; PROPELLANTS; PROPULSION; PROPULSION SYSTEM PERFORMANCE; AMERICIUM ISOTOPES; DEUTERIUM; TRITIUM
Availability Source: Other Sources
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