Documents / Official release
This Defense Intelligence Reference Document, dated 10 March 2010, was prepared by the Defense Intelligence Agency's Defense Warning Office under the Advanced Aerospace Weapon System Applications Program. It surveys the basics, experimental status, theory and possible uses of inertial electrostatic confinement (IEC) fusion, with emphasis on work at the University of Illinois Urbana-Champaign. It covers neutron sources, explosives detection and space propulsion. It ends by proposing a 12-gun hydrogen plasma experiment meant to show breakeven conditions for p-11B fuel.
From the source: Release of 2026-09-18 Incident: 3/10/10, 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 surveys inertial electrostatic confinement (IEC) fusion, a relatively unconventional fusion concept that uses electric fields rather than the more established magnetic or laser-based approaches to confine ions, and it reviews both the underlying physics and the experimental work associated with the concept. The report emphasizes that IEC may have nearer-term value as a compact neutron, proton, or x-ray source and as a platform for studying experimental fusion approaches, while also presenting more ambitious possibilities such as aneutronic power generation and propulsion applications. At the same time, it makes clear that the concept remained far from practical fusion power, with experimental devices operating several orders of magnitude below breakeven and with major unresolved issues involving confinement, losses, grid damage, and scale-up. Overall, the document treats IEC as a technically interesting but still highly speculative path toward fusion energy, while suggesting that its more limited spin-off applications were more plausible in the near term than its long-range power generation or propulsion applications.
UNCLASSIFIED/ /FOR 8FFIOIAL ~81!! 9HLY .....- 1'10 .... -------''---..---------.---------r-----------...,, 10 ~ ~- - --- ---------------------+-------,t iR .._o•u:s Figure 1.2. Idealized Potential Structure Calculated by Hirsch for Monoenergetic Ions With No Angular Momentum. The nested virtual anodes and cathode s observed were originally termed " poissors" by the inventor, Philo Farnsworth . This is a very striking result that enthused these researchers to push on with this research. It, in effect, circumvents the Elmore et al. restriction by changing the potential well physics fundamentally. Of course in practice, there will be a spread in energy and angular momentum, so one would not expect more than a single potential well (vs. the infinite poissors of Farnsworth) to form in practice. The questions remaining then were (and still are): "How deep can such a well be in practice and how high an ion density can be trapped in it?" Various studies followed to study these issues more thoroughly using simulation codes. For examp le, Klevens and Black found in Reference 1.3 that: "A model of an electrostatic confinement device with ion injection has been developed which provides strong correlation between theory and experiment. The ion density profile was determined in position velocity throughout the two concentric grids by considering the processes of cha r ge transfer and grid capture. A shallow-well approximation was incorporated in the model by assuming that ions encountering charge transfer in the inner grid region were accelerated up to a maximum of 5 percent of the applied grid voltage, and that the velocity of beam ions was constant in this region. Distribution functions in total energy and angular energy were developed for both ions and electrons. The ion distribution function consisted of three parts: a beam created at the anode and accelerated by the applied cathode voltage; a low -energy group produced by charge transfer near the cathode or in the center; and a intermediate-energy group resu lting from charge-transfer reaction between anode and cathode. For each group the angular energy was assumed uniform up to a maximum value, which was different for each energy group. The electrons were assumed to be isotropic in velocity space, and to be uniformly distributed in total energy in the potential well in which they are trapped . The distribution functions were substituted into Poisson's equation and potential and density profiles for various UNCLASSIFIED/ I f8R 8FFIEilAk lel&& 0PU,¥ 6
Not linked to a story yet.
Official release, from the pursue collection. The PDF is mirrored here; the original link is above. 72 pages are in the text index: search them above, or from the library's search.