Documents / Official release
This Defense Intelligence Reference Document was prepared by the Defense Intelligence Agency's Defense Warning Office and dated 2 March 2010. It is one of a series of advanced technology reports produced under the Advanced Aerospace Weapon System Applications program. It looks at using positrons as fuel for air-breathing turbojets, ramjet-assisted missiles, single-stage reusable vehicles and rockets for a manned Mars mission, and it also covers positron production, costs and storage. It concludes that a first positron-powered flight around the globe could be possible within 10 years.
From the source:Release of 2026-09-18 Incident: 3/2/10, Las Vegas, Nevada. Released with redactions. This document is a Defense Intelligence Reference Document (DIRD), a technical reference format used by the Defense Intelligence Agency (DIA) to capture baseline knowledge on a specific topic for later analytic use. DIRDs are best understood as reference and synthesis products rather than as original research. It is one of 38 DIRDs produced under the Advanced Aerospace Weapon System Applications Program (AAWSAP) between 2009 and 2011. Because AAWSAP’s scope permitted a broad range of supporting topics, not every DIRD in the series directly concerns aerospace systems or future threat assessment. The following summary reflects the DIRD’s scope and framing at the time of writing and should not be read as implying current validation of the concepts discussed. This DIRD examines positrons as a possible fuel for advanced aerospace propulsion, arguing that antimatter offers extraordinary energy density and could, in principle, support applications ranging from long-endurance aircraft and missiles to single-stage launch vehicles, onboard power systems, and crewed Mars missions. At the same time, it makes clear that the concept depends on resolving major unsolved problems in producing positrons in sufficient quantities and storing them safely for long periods, and much of the document’s discussion of flight systems and Mars missions remains conceptual rather than closely tied to demonstrated engineering practice. Its overall conclusion is that positron propulsion is theoretically attractive, but remains highly speculative as a practical technology because its core production and storage requirements remain unsolved.
“Anderson”2 pages
UNCLASSIFIED/ JFOR OFFICIAL USE 014[ I Antimatter Antimatter appears in the form of fundamental particles that have their sign of electric charge reversed from their matter counterpart . For example, the positron, e+, is the antiparticle to the electron, e·. According to the CPT theorem, 4 properties of matter and their counterpart antimatter particles are identical. This has been tested in the laboratory to an accuracy of rough ly 1 pa rt in 10 million. Antimatter is appealing for aerospace uses because its specific energy by annih ilation is 180 MJ/μg, or 10 orders of magnitude larger than chemical energy, as shown in Figure 1. 1.00E+03 ~--------------- 1.00E+02 +-------------- 1.00E+01 +-------------- 1.00E+O0 -+-------------- 1.00E-01 -+------ Energy Dens ity _OOE-02 ----- MJ/μg 1.00E-03 ----- _OOE-04 +------- 1.00E-05 +------ 1.00E-06 -+------ 1.00E-07 -+------ 1.00E-08 -1-----.,---- Olerrical Fission Fusion Fbsitron Annihilation Figure 1. Specific Energy for Chemical, Nuclear, and Antimatter Materials In the presence of matter, the positron binds with an electron to form a short-lived atom called positronium (Ps). Depending on the relative spin orientations of the positron and electron, Ps has a mean lifetime in a vacuum of 125 picoseconds (para-Ps, spins antiparallel), or 142 nanoseconds (ortho-Ps, spins parallel). From quantum number conservation, para-Ps decays into two gamma rays of equal energy, 511 kiloelectronvolts (keV), whereas ortho-Ps decays into three gamma rays whose energies add up to 1022 keV. Hence, when Ps self-annihilates, there is 100 percent conversion of mass into electromagnetic energy given by Einstein's famous equation, E = mc2, where c is the speed of light. Although the energies of positron ann ihilation gamma rays are on the nuclear scale, they have none of the undesirable features associated with nuclear energy. First, the annihilation evolves rapid ly (nanoseconds) and is controllable under predictable electromagnetic forces. There is no long-term inertia as with nuclear reactors. Consequently, positron-generated thrust can be throttled. UNCLASSIFIED/ /570A OFFl&IAk W&E 8HLY 1
Not linked to a story yet.
Official release, from the pursue collection. The PDF is mirrored here; the original link is above. 35 pages are in the text index: search them above, or from the library's search.