AAWSAP DIRD, Advanced Nuclear Propulsion for Manned Deep Space Missions, March 2010

This Defense Intelligence Reference Document is dated 11 March 2010. It was prepared by the Defense Intelligence Agency's Defense Warning Office as part of the Advanced Aerospace Weapon System Applications program. It is a technical paper arguing that spacecraft driven by deuterium thermonuclear reactions could be built with current science and could reach the outer solar system. It covers magnetic insulation, ignition by proton beams, a Super Marx generator and conjectured chemical superexplosives. It does not discuss any UFO sightings.

From the source:Release of 2026-09-18 Incident: 3/11/10, 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 advanced nuclear propulsion for crewed deep-space travel and argues that human missions beyond the Moon would require propulsion systems with both very high thrust and very high specific impulse, which the author contends are difficult to achieve with conventional chemical, nuclear-thermal, and nuclear-electric systems. The report focuses on concepts derived from Project Orion, the discontinued General Atomics nuclear pulse propulsion study sponsored first by ARPA and later by the U.S. Air Force between 1958 and 1965, in which a spacecraft would be driven by repeated nuclear explosions. In this case, the DIRD emphasizes small non-fission-triggered fusion explosions using deuterium, magnetic mirrors, and other unconventional ignition concepts intended to avoid the inefficiencies associated with small fission devices. It presents these ideas as a possible pathway to crewed missions across the solar system, while also linking them to broader visions of long-range human expansion into space. The document is exploratory in character and depends on several unproven ignition methods, enabling technologies, and engineering assumptions. Overall, it is a theoretical examination of fusion-based pulse propulsion concepts rather than as a documentary account of a technology nearing practical realization.

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of the cylindrical argon rod. If the shock is launched from a distance of ~1 m onto an
argon rod with a radius equal to 10 cm, the temperature reaches 90,000 K, just right to
excite the upper laser level of argon. Following its heating to 90,000 K, the argon
cyl inder radially expands and cools, with the upper laser level frozen into the argon.
This is similar to a gas dynamic laser, where the upper laser level is frozen in the gas
during its isentropic expansion in a Laval nozzle. To reduce depopulation of the upper
laser level during the expansion by superradiance, one may dope to the argon with a
saturable absorber, acting as an "antiknock" additive. In this way, megajoule laser
pulses can be released within 10 nanoseconds. A laser pulse from a small Q-switched
argon ion laser placed in the spacecraft can then launch a photon avalanche in the
argon rod, igniting a DT microexplosion.
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[:l\ ~ 1tl_~l}l ~ l :l:ltl : . l : l}}l ~ 1 :CTL ►DT
"- D
~ 1 ~ ltl : :: 1}1~~________.......
Figure 5. Argon Ion Laser Igniter, to Ignite a Staged DT -+ DD Fusion Explosion in a Mini-Teller-Ulam
Configuration. A solid argon rod. HE cylindrical shell of high explosive, d detonators. Q Q-switched argon ion laser
oscillator.
Employing the Teller-Ulam configuration, by replacing the fission explosive with a DT
microexplosion, one can then ignite a much larger DD explosion.
As an alternative, one may generate a high current linear pinch discharge with a high
explosive-driven magnetic flux compression generator. If the current I is on the order
of I= 107A, the laser can ignite a DT thermonuclear detonation wave propagating down
the high current discharge channel, which in turn can ignite a much larger pure DD
explosion.
If the craft is launched from the Earth's surface, one has to take into account the mass
of the air entrained in the fireball. The situation resembles a hot-gas-driven gun, albeit
one of rather poor efficiency. There the velocity gained by the craft with N explosions,
each setting off the energy E,, , is given by
(27)
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