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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/ ,CFOA OFFl&il.\k W&& 8PtLY 3.13 J. Khachan, A. Samarian, "Dust diagnostics on an inertial electrostatic confinement discharge", Phys. Letters A, vol. 363, no. 4 (2007) pp . 297-301. 3.14 L. Blackhall, J. Khachan, "A simple electric thruster based on ion charge exchange", vol. 40, No. 8, (2007) pp. 2491-2494. Section IV. IEC Theory Early basic IEC theory was briefly e emitter Onion-shaped B -W0 kVdescribed in Section I. Section IV will conductornow turn to some more recent studies starting with an early study by Bill ov Nevins (Reference 4.1) that has caused concern in the community about the suitability of the IEC for a fusion power reactor. Nevins did a semi analytic analysis where IEC systems are predicated including a non -equ ilibrium ion distribution function. Coulomb collisions between ions cause this distribution to relax to a Maxwellian on the ion-ion collisional time scale. His analysis suggests that the input power required to prevent th is relaxation, thus Reflector maintaining the IEC configuration for times beyond the ion-ion collisional time -Wo kV· few V scale, is greater than the fusion power Figure 4.1 . Cross Section of the Experimental Layout of the PFX-1 Experiment. The emitter -electron source,produced. Thus, he concluded that IEC onion-shaped anode and refl ector form an axial systems show little promise for the electrostatic well for electron axial confinement. Rad ial development of commercial electric confinement is provided by the axi al magnetic field. The reflector is biased slightly more negative than the emitterpower plants. Nevin's analysis appears to avoid electron losses to the refl ector. to be very thorough, however, as discussed next, it suffers from severa l key, but subtle assumptions that may force the pessimistic results. Later, to further explore issues raised by Nevins, Lu is Chacon, doing his thesis with G. Miley, decided to use a Fokker Plank model for analysis of the IEC so that some of the questionable assumptions used by Nevins could be relaxed. This study, presented in Reference 4.2, specifically dealt with a Penning-type IEC due to interest in the Penning trap experiment at LANL. The experimental device, PFX-I is illustrated in Figure 4.2 while the reactor-like configuration modeled by Chacon is shown in Figure 4.2. It should be stressed however, that the conclusions still apply in principle to the ion injected IEC since the issues involve the potential well trapping common to both. The Penning trap and the ion injected devices differ in how the well is formed and stabilized, but the physics of trapped plasma confinement is the same. Namely, the time scale for collisional degradation of the beam-like ion distribution function is crucial since short times (as the fusion time) would prevent a power reactor. Nevins addressed this issue by calculating collisional relaxation rates from a beam-like, monoenergetic ion population, absolutely confined in a square potential well. From his analysis, Nevins concluded that the IEC will thermalize and lose ion focusing before enough fusion UNCLASSIFIED/ /FOR OFFl&ilAk Wii OrelL¥ Superconducting magnet 34
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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.