Documents / Report
This Defense Intelligence Reference Document from the Defense Intelligence Agency is dated 23 March 2010. It was produced under the Advanced Aerospace Weapon System Applications (AAWSA) Program and surveys the history of attempts to use superconductors to manipulate gravity in the laboratory. It reviews theoretical work by Li and Torr, Podkletnov's disputed gravity shielding experiments, NASA replication attempts and Tajmar's results. It concludes that no repeatable effect has been verified and that research in this area remains fraught with experimental difficulty.
“Anderson”1 page
UNCLASSIFIED//F811. 8FFll!l*L 1!1!11! t!IIU:!Y 15 Podkletnov, E. and Nieminen, R., "A Possibility of Gravitational Force Shielding by Bulk YBa2Cu307-x Superconductor," Physica C, Vol. 203, 1992, pp. 441-444 16 Li, N. and Torr, D. G., "Effects of a Gravitomagnetic Field on Pure Superconductors," Phys. Rev. D, Vol. 43, No. 2, 1991, pp. 457-459 17 Li, N. and Torr, D. G., "The Gravitoelectrodynamics of Superconductors: A Theoretical Basis for a Principle of Electrically Induced Gravitation," Bull. Am. Phys. Soc., Vol. 37, No. 2, 1992, Session GS paper 10 18 Li, N. and Torr, D. G., "Gravitoelectric-Electric Coupling via Superconductivity," Found. Phys. Lett., Vol. 6, No. 4, 1993, pp. 371-383 19 Dewitt, B.S., "Superconductors and Gravitational Drag," Physical Review Letters, Vol. 16, 1966, p. 1902 20 Ross, D.K., "The London Equation for Superconductors in a Gravitational Field," Journal of Physics A, Vol. 16, 1983, pp. 1331 - 1335 7 ' Prof. Pentti Kettunen, Tampere, Finland, private communication, 2007 22 Risto Nieminen, Tampere, Finland, private communication, 2007 23 de Podesta, M., Bull, M., "Alternative Explanation of"Gravitational Screening" Experiments," Physica C, Vol. 253, 1995, pp 199-200 74 Prof. R. Gonnelli, Turin, Italy, private communication, 1999 25 Woods, R. C., Cooke, S. G., Helme, J., and Caldwell, C. H., "Gravity Modification by High-Temperature Superconductors," AIAA-2001-3363, 37th AIAA/ASME/SAE/ASEE Joint Propulsion Conference, Salt Lake City, UT, July 2001. 26 Kowitt, M., "Gravitomagnetism and Magnetic Permeability in Superconductors," Phys. Rev. B, Vol. 49, 1994, pp. 704-708 27 Harris, E.G., "Comments on 'Gravitoelectric-electric Coupling via Superconductivity'," Found. Phys. Lett., Vol. 12, 1999, pg. 201 28 Podkletnov, E., "Weak Gravitational Shielding Properties of Composite Bulk YBCO Superconductor below 70K under EM Field" LANL cond-mat/9701074 v.3, 16 Sept 1997 29 Li, N., Noever, D., Robertson, T., Kaczor, R., and Brantley, W., "Static Test for a Gravitational Force Coupled to Type II YBCO Superconductors," Phys1ca C, Vol. 281, 1997, pp. 260-267 30 Noever, D., and Kaczor, R., "Radio-frequency Illuminated Superconductive Disks: Reverse Josephson Effects and Implications for Precise Measuring of Proposed Gravity Effects," NASA JPL 9th Advanced Space Propulsion Research Workshop & Conference, Pasadena, CA, 1998 31 Noever, D., Kaczor, R., Roberson, R., "Superconductor-Mediated Modification of Gravity? AC Motor Experiments with Bulk YBCO Disks in Rotating Magnetic Fields," AIAA-98-3139, 34th AIAA/ASME/SAE/ASEE Joint Propulsion Conference, Cleveland, OH, July 1998 32 Reiss, H. D., "A Possible Interaction between Gravity and High Temperature Superconductivity - by a Materials Property-:>," 15th European Conference on Thermophys1cal Properties, Wuerzburg, Germany, Sept 1999 33 Reiss, H. D., "Weight Anomalies Observed during Cool-Down of High Temperature Superconductors," Phys. Essays, Vol. 16, 2003, pp. 236-253 34 Podkletnov, E. and Modanese, G., "Impulse Gravity Generator Based on Charged YBa2Cu307-y Superconductor with Composite Crystal Structure," arXIv: physics/0108005, Aug. 2001 35 Hathaway, G., Cleveland, B., and Bao, Y., "Gravity Modification Experiment using a Rotating Superconducting Disk and Radio Frequency Fields," Physica C, Vol. 385, 2003, pp. 488-500 36 Tajmar, M., and De Matos, C., "Coupling of Electromagnetism and Gravitation in the Weak Field Approximation," Jnl. of Theoretics, Vol. 3, No. 1, 2001 37 De Matos, C., and Tajmar, M., "Grav1tomagnet1c Barnett Effect," Indian J. Phys., Vol. 75B, No. 5, 2001, pp. 459- 461 38 Chiao, R., "Superconductors as Quantum Transducers and Antennas for Gravitational and Electromagnetic Rad1at1on," arXiv: gr-qc/0204012, Apr. 2002 39 Harris, E., "Superconductors as Gravitational Wave Detectors," 69th Annual Meeting Southeastern Section, Am. Phys. Soc., No. NC.001, 2002 40 London, F., in: Superfluids, Vol 1, John Wiley & Sons, New York, 1950, pg. 78 11 Tate, J., Cabrera, B., Felch, S., and Anderson, J., "Precise Determination of the Cooper-pair Mass," Phys. Rev. Lett., Vol. 62, No. 8, 1989 pp. 845-848 42 Tajmar, M., and De Matos, C., "Gravitomagnetic Field of a Rotating Superconductor and of a Rotating Superfluid," Physica C, Vol. 385, 2003, pp. 551-554. 13 Reiss, H.D., Hathaway, G.D., "Minimum Experimental Standards in the Laboratory Search for Gravity Effects," Space Technologies and Applications International Forum 2005, El Genk, M.S. (ed.) American Institute of Physics Conference Proceedings, Melville, NY, 2005 44 Tajmar, M., Plesescu, F., Marhold, K., De Matos, C., "Experimental Detection of the Gravitomagnetic London Moment," arXiv: gr-qc/0603033, Mar. 2006 45 E.W. Davis, Institute for Advanced Studies, Austin, TX, private communication, 2007 46 Tajmar, M., Plesescu, F., Seifert, B., Schnitzer, R., and Vasiljevich, I., "Search for Frame-Dragging in the Vicinity of Spinning Superconductors" arXiv: abs/0707.3806v7 17 M. Tajmar, Austrian Research Centres, Seibersdorf, Austria, private communication, 2008 48 http://www.newscientist.com/art1cle/dn13938?feedld=online-news_rss20, accesses Jan 25, 2009 12 UNCLASSIFIED,'1F811. 8FFll!l*L 1!181! 811L¥
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Report, from the dia collection. The PDF is mirrored here; the original link is above. 16 pages are in the text index: search them above, or from the library's search.