Documents / Report
This Defense Intelligence Reference Document from the Defense Intelligence Agency is dated 3 January 2011. It was produced under the Advanced Aerospace Weapon System Applications (AAWSA) Program as part of a series of advanced technology reports. The report asks whether negative mass exists and whether it could be used for propulsion. It concludes that one route might be an ultra-light form of matter that could have gathered at the Moon's center. Reaching it would take a tunnel dug with thermonuclear shape charges.
“Masse”28 pages
UNCLASSIFIED/ ,'P81l 81'1'11!111it 1!1!11!! 811LY The time needed for the liquid metal to pass through a ~ 20 m thick layer is then ~ 2 x 103 seconds~ 1 hour. The specific heat per unit volume of the coolant is pc, ~ 3 x 107 erg/cm 3K, and for T = 3 x 103 Kone has pcJ ~ 10 11 erg/cm 3 . The heat per unit volume which has to be removed from the crushed rocks is of the order p, where p is the rock pressure. In the center of the moon where p = 5 x 1010 dyn/cm 2 , this energy is 5 x 10 10 erg/cm 3 . It thus follows that the volume of the liquid coolant must be about 1/2 of the rock volume to be cooled. For a rock volume of (20 cm) 3 ~ 104 m 3 , a coolant volume of about 5 x 10 3 cm 3 would be needed. The same coolant can be used many times over after the heat is removed from it, which could be done on the surface of the moon by radiation or perhaps better by heat exchangers transferring the heat to lunar sand. Without a thick layer of shattered rocks surrounding the tunnel, the pressure acting on the tunnel wall would be large, in particular in the center of the moon. Because of friction between particles of the shattered rock, large shear stresses can be sustained changing the pressure distribution in the rock and reducing the pressure gradient and hence the pressure on the tunnel wall. A more detailed calculation [15] for the pressure distribution in the shattered rock tunnel wall gives (113) where ro is the radius of the tunnel. Integrating eqn (108) one obtains for the pressure distribution in the moon (114) for which one can also write p(r) ~ P,,,,, (,-(; )'J. (115) 35 UNCLASSIFIED/ ,'1'81l 81'1'11!111it 1!1!11!! 811LY
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Report, from the dia collection. The PDF is mirrored here; the original link is under it. 43 pages are in the text index: search them above, or from the library's search.