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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/ /FOR OFFI&IAk WS& ONkY The corresponding ion density profile, shown in Figure 4.8, has a high value inside the virtual cathode (center core plasma) and also a peak in front of the grid (real cathode). Radius [m) Radius [ml Figure 4.7. The Double Well Potential Calculated With Figure 4.8. Ion Density Profile for Potential IXL Code for d1Jperp, i=14keV, I 1= SSA, I e= S9A Well Shown in Figure 4.7 An important new insight obtained in the study revea led that these potential profiles create ion density distribution functions completely different from the ones observed when a single well electrostatic potential exists. Two ion density peaks were commonly observed - one in the central IEC core region, and one near the cathode wire grid as seen in Figure 4.8. In th is manner, the single ion peak created by the single well potential is split into two peaks. The central ion peak has a much sma ller radius than the original peak. This causes higher ion densities to occur in 20 30 40 so Cllhodc CWTCDI [A l 60 70 Figure 4.9. The D-D Fusion Reaction Rate Versus the central potential well, which is Cathode Current for dEperp, 1 =8 keV essential for the achievement of high fusion rates. However, since the fusion core rad ius iin these calculations is very sma ll - on the order of 0.4 cm - 0 .9 cm, the total number of neutrons emitted per second is too low to create useful fusion power (see Figure 4.9). Still, the physics principles Illustrated provide important insight into injection issues. A reduced angular momentum spread and higher injection energies would be required to correct the well volume problem. Sti ll , the 0 - 0 fusion rate scaling of 15 is encouraging, and it is indeed surprising that this large angular momentum spread achieves such distinct double well structures. As stated in Section I, the current scaling for beam -beam reactions is strictly 12. However, as shown by Tzonev et al., nonlinear changes in the potential well shape and ion density profile combine to cause the higher power current scaling law. It would be anticipated, however, that this effect would saturate at some current, tending back to the fundamental I2 relation. Along these lines, it should be noted that prior investigators also predicted scaling laws with y - ml•mOAS Error 80 ml 9.5163c-08 1.51 SSe-09 Ot q 9. 1482 NA 70 R 0.99906 60 j 50+----+-----+--+--•/'f' -- 40 _ ________, ~ 30 0 o wr--;r---,--zr--;t:====t===:::1...,. o.i...-,.:j~.:+-t-1-+-+++-+-+-+-t~~......+-1 UNCLASSIFIED/ /FOA &FFI&IAk WSE O,.LY 40
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