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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.
“Lockheed”2 pages
UNCLASSIFIED//F811. 8FFll!l*L 1!1!11! t!IIU:!Y fluctuations). Theoretically, the spectrum of voltage fluctuations, S(w,n, of a resistive circuit is given by (Reference 21): S(w ,T) ~ R(w,T) hw corh( hw) rr 2 2kT ( 2) where R(w,n is the total resistance (ohmic plus radiative), w is the (angular) frequency, and Tis the absolute temperature. The resistance R(to,T) is temperature dependent through its ohmic contribution. 6 Note the similar hyperbolic cotangent functions appearing in Equation (2) and in the second line of Equation (1). The postulate of Blanco et al. is that the total resistance must include the radiation resistance of the circuit (Reference 21): R(w,T) = Rohmk (w, T) + R,ml (co) Under the assumption that the wavelengths of the ZPF modes of interest are larger than the dimensions of the circuit, the radiation resistance of a coil is given by (Reference 21): ; ; ( )'R w) ~ ~ rr-N" aw rnd ( 3. C C where N is the number of coil turns, and a is the radius of the coil winding. ( 3) (4) According to Blanco et al., large enhancements in ZPF-induced voltage fluctuations are possible. By reducing the temperature to minimize ohmic resistance, making the coil of many turns and large radius, and performing measurements at high frequency, it should be possible to investigate this amplification effect. The predicted coil-enhanced voltage spectrum can readily be computed. The result is shown in Figure 4 for a 1 cm diameter coil of 2000 turns, made of 38 AWG tungsten wire, and kept at a temperature of 3 K. In Figure 4, the upper (blue) curve represents the predicted voltage spectral density for the combined ohmic plus radiation resistance. The lower (red) curve is the predicted result when radiation resistance is ignored. If the postulate of Blanco et al. is correct, the enhancement in voltage fluctuations due to the antenna-like nature of the coil should be easily measured at frequencies as low as 100 MHz (where the coil enhancement effect is~ 100-fold for tungsten). 6 The radiation resistance depends only on frequency. 8 UNCLASSIFIED//F811. 8FFUiil*L l!ll!li &•II!¥
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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.