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This Defense Intelligence Reference Document from the Defense Intelligence Agency, dated 6 April 2010, is one in a series of FY 2009 advanced technology reports produced under the Advanced Aerospace Weapon System Applications (AAWSA) program. It reviews the physics of zero-point field energy in the quantum vacuum and proposed schemes for extracting it, including the Casimir effect, Forward's vacuum-fluctuation battery, and resonant dielectric spheres. It notes that no practicable extraction technique has been demonstrated in the laboratory.
UNCLASSIFIED//FIHl 8FFHil.t.k Wfili tH•kY transparent state rather than in the reflective state. The experiment tested this for plate separations of 70 - 400 nm. Iannuzzi et al. 's experimental results showed that the Casimir force did not noticeably decrease after filling the experimental apparatus with hydrogen. This may have occurred for two reasons. First, the dielectric properties of the HS Ms used in the experiment are only known only in a limited range of wavelengths spanning 0.3 - 2.5 ~tm, while the experiment measured the transparency of the HSMs over a wavelength range of 0.5 - 3 ~1m. This narrower wavelength span excludes the rest of the electromagnetic ZPF modes having wavelengths shorter than 0.5 pm and longer than 3 μm. The ZPF modes lying outside this narrow wavelength span were not affected by the hydrogenation-induced transparency of the HSMs, hence their contribution to the total Casimir force acting between the HSMs was not included. One would expect to see a significant decrease of the Casimir force if the hydrogenation-induced transparency of the HS Ms had affected all of the ZPF mode wavelengths ranging from IR to UV (ZPF modes with/,>> 2.5 pm will not give rise to large contributions to the force). Second, the experiment demonstrated a property of the Lifshitz theory (see Reference 33 for more detail), that in order to significantly change the Casimir force between surfaces at separations on the order of 100 nm it is not sufficient just to change their optical (IR and visible) reflectivity, but it is necessary to modify their dielectric functions over a much wider spectral range. This comports with the first reason, and indicates that more theoretical and experimental work is needed to overcome the shortcomings of this experiment, and allow for the design and testing of new experiments that can achieve Casimir plate transparency over a wider spectral range. A notion similar to the tunable Casimir Effect involves changing the dimensions of a rectangular "Casimir box." Forward (Reference 34) proposed a paradox in which energy could be extracted by altering the aspect ratio of a conductive rectangular Casimir cavity over a specific cycle of dimension changes (for example, varying width while holding length constant). It was subsequently shown by Maclay (Reference 26, 35), that the Casimir energy inside the box is not isotropic, varying in such a way that more work is expended in cycling the box dimensions than can be extracted. It appears that no net gain of energy is theoretically possible in this scheme. Whether such considerations apply to the tunable Casimir cavity concept remains to be assessed. EV PHENOMENON Shoulders (Reference 36) developed an experimental program to explore the physics of microscopic plasma vortices (aka force-free plasmoids), which are thought to be a form of ball lightning (Reference 37). This study was motivated by the earlier experimental work of Wells at the Princeton University Plasma Physics Laboratory, Bostick and Nardi at the Stevens Inst. of Technology, and their collaborators (Reference 38-45). Shoulders became interested in the possibility of stable, quantized force-free structures that could be taken apart by some process to yield a net energy gain for power generation. The foundation for this speculation was Nardi et al.'s (Reference 45) observation of strange electron concentrations they called vortex filaments that formed in an electron beam made by plasma focus or relativistic electron beam machines, which exhibited electron concentrations that appeared to violate the space charge law. Furthermore, Nardi et al. observed that the vortex filaments were striking exposed materials (for example, metals, dielectrics, ceramics, glass), boring smooth channels straight through them, and sometimes exploding with such a large force that they 17 UNCLASSIFIED/ ,"I Otl 8ffl@I.«1k I 155 ANI X
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Report, from the dia collection. The PDF is mirrored here; the original link is above. 57 pages are in the text index: search them above, or from the library's search.