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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.
UNCLASSIFIED/ /POI\ OPPl@IAL li!E 8,.Llf with sharp peaks were observed. In Tzonev's study, spread-out potential extremisms are observed due to the high angular momentum spread. The virtual anode is defined as that position where the potential increases from its minimum value at the real cathode up to about 95 percent of its maximum value. The virtual cathode is defined as the position where the potential is 95 percent as deep as its minimum value in the center of the IEC device. The depth of the "inner" potential minimum, more frequently called the double well. Depth is defined as a percentage of the height of the "outer" potential maximum. For the case shown, the double well has a depth of about 60 percent. 1BC cathode I rid ·-:: - I!. 0 Virtual ·albo<l Radiu [m] Vinual anode Figure 4.5. The Definition of the Double Well Figure 4.6. The Definition of the Parallel and Depth: Double Well Depth [%] = -dV/V10t x 100. Perpendicular Velocities at the IEC Cathode Grid The case shown assumes 30-keV injection . The definition of angular momentum is also illustrated in Figure 4.6. In spherical geometry, the velocity component perpendicular to the radius axis represents the angular momentum. TZONEV ET AL. - DEEP WELL STUDY Tzonev et al. (Reference 4.4) used the IXL (ion accelerated code), a 1-D electrostatic Poisson-Vlasov equation solver for use in spherical geometry. IXL was originally developed by Mission Research Corporation for R.W. Bussard. The primary purpose of the code is to determine an electrostatic potential consistent with the dynamics of the charged particles with in that same potential, and to determine the charged particle density distribution inside of the spherical cathode. While IXL neglects collisional effects, it still provides an important limiting case where space charge effects dominate. The boundary conditions for each particle population are characterized by five parameters: injected beam current, average injection energy, energy spread associated with the velocity component in both parallel and perpendicular directions, and the number of recirculations through the core. Tzonev et al. found that deep double electrostatic potential wells can occur at high ion and electron currents (30 A-60 A); high perpendicular ion energy spread (3 keV-14 keV); low perpendicular electron energy spread (3 eV), and low radial ion energy spread (0.1 eV-0.5 eV). An example is given in Figure 4.7. UNCLASSIFIED/ /FOA &FFI&IAL WSE 8,.LY 39
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