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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.
“Jet Propulsion Laboratory”4 pages
UNCLASSIFIED/ /fOR. Offl@IAL WS& 8PU:¥ An added long-term potential advantage of developing the !EC-jet thruster is that the concept can eventually be extended to an ultra high impulse fusion power/propulsion unit. Indeed, the thruster concept arose from work on a fusion based IEC (Reference 3.5). To move to fusion power, however, would require advances such as discussed for terrestrial IEC power plants as Section VI. JET Extraction From a Spherical IEC A plasma jet can be extracted from the gridded spherical IEC by enlarging a grid opening. This forms the basis for various exciting applications including a jet thruster and various plasma processing uses such as gasification of municipal wastes and future materials recycle. Here, to illustrate this asymmetrical geometry, we briefly consider the IEC jet thruster for use in satellite operations and maneuvering (Reference· 3.6). Description of the IEC let Thruster For conventional star mode operation, such as discussed earlier, the IEC grid is designed to be highly symmetric so that the microchlannel beams are also symmetric, providing good convergence. However, experiments have demonstrated that enlarging one of the grid openings distorts the potential surfaces. This results in the creation of a very intense, tightly coupled space -charge-neutralized ion jet directed outward from the central core plasma region (see Figure 3.2) (Reference 3. 7), and it is this mode of operation (star with jet) that would be employed for the proposed thruster. Enmtters Xenon Electron Guide + IOOV ~ (a) (b) Figure 3.2. (a) Jet Operational Mode in Experimental IEC Device and (b) Jet Set-up The jet formation has been explained theoretically (Reference 3.5) in terms of the large distortion of the potential surface at the enlarged grid opening. The local gradient initiates electron flow that in turn drags ions out across the surface. The result is the formation of the intense space charge neutralized ion beam (or "plasma jet") at that location. Such operation has been routinely obtained in laboratory IEC devices under steady-state operation, with the plasma jet being maintained for hours. The power carried by the jet has been demonstrated by heating a target plate placed in its path. Over half of the energy imparted to the ions by the accelerating grid is effectively funneled into the jet, and no major losses of ions to the vacuum chamber wall or grid UNCLASSIFIED/ /FOA 9FFIEIAL: PPili OIILY 24
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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.