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

U.S. Department of War · 2010-03-11 · 37 pages · text from the file's own layer

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.

UNCLASSIFIED/ /FOA QFFl&I.t.k WSI: 8,.kY
release intense bursts of keV X-rays capable of igniting a DT thermonuclear reaction,
which in turn could ignite a larger deuterium detonation.
To realize the first possibility, one might consider pumping a solid argon rod with a
convergent cylindrical shock wave driven by a high explosive (Reference 9). If the
argon rod is placed in the center of convergence and reaches a temperature of 90,000
°K, the upper ultraviolet laser level of the argon will be populated. Following this
heating, the argon cylinder radially expands and cools, with the upper laser level frozen
into the argon. The energy thus stored in the upper laser level can then be removed
from the rod by a small Q-switched laser, the resulting powerful laser pulse optically
focused onto a thermonuclear target.
To realize the second possibility, one would have to subject suitable materials to very
high pressure (Reference 10, 11). These energetic states can be reached only if during
their compression the materials are not appreciably heated, because such heating
would prevent the electrons from forming t he bridges between the inner electron shells.
Details of t he second possibility are provided in t he appendix.
Magnetic Insulation and Inductive Charging
Two concepts are of great importance for t he envisioned realization of a deuterium
fusion-driven starship:
• The concept of magnetic insu lation, which permits the attainment of ultrahigh
voltages in high vacuum (Reference 1).
• The concept of inductive charging, by which a magnetically insulated conductor can
be charged up to very high electric potentials (Reference 12).
MAGNETIC INSULATION
In a greatly simplified way, magnetic insulation can be understood as follows: if the
electric field on the surface of a negatively charged conductor reaches a critical field on
the order of Ee ~ 107 Vjcm, the conductor becomes the source of electrons emitted by
field emission. The critical electric field for the emission of ions from a positively
charged conductor is ~ 108 V/cm. Therefore, if in a high-voltage diode the electric field
reaches ~107 V/cm , breakdown will occur by electric field emission from t he cathode to
the anode. But if a magnetic field of strength B measured in gauss is applied in a
direction parallel to the negatively charged surface, and if B > E, where E (like B) is
measured in electrostatic cgs units, the field-emitted electrons make a drift motion
parallel to the surface of the conductor with the velocity.
w w
E x B E
v =c-- =c - (1)d B2 B
To keep vd/C < 1 then requires that E < H. Let us assume that H::::: 2 x 104 G, which can
be reached with ordinary electromagnets, means that E ~ 2 x 104 esu = 6 x 106 V/cm.
UNCLASSIFIED/ /FOR. 8Fflt1Jlct U:!I! OHLI
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Official release, from the pursue collection. The PDF is mirrored here; the original link is above. 37 pages are in the text index: search them above, or from the library's search.