DIRD_15-DIRD_Advanced_Space_Propulsion_Based_on_Vacuum_Spacetime_Metric_Engineer.pdf

UNCLASSIFIED /fPOROTPterre vst ONner Defense ogy? Intelligence <<.) Reference “eee Document fo el Acquisition Threat Support 29 March 2010 ICOD: 1 December 2009 DIA-08-1003-015 Advanced Space Propulsion Based on Vacuum (Spacetime Metric) Engineering UNCLASSIFIED / AP@R°@FEEGItiay GEG hie

UNCLASSIFIED / SAREE eben Advanced Space Propulsion based on Vacuum (Spacetime Metric) Engineering Prepared by: (b)(3).10 USC 424 Defense Intelligence Agency Author: (b)(6) Administrative Note COPYRIGHT WARNING; Further dissemination of the photographs in this publication is not authorized. This product is one in a series of advanced technology reports produced in FY 2009 under the Defense Intelligence Agency, [(b)3):10 US¢ 424 Advanced Aerospace Weapon System Applications (AAWSA) Program. Comments or questions pertaining to this document should be addressed to AAWSA Program Manager, Defense I…

UNCLASSIFIED / / F@R-@5FEGiieGE-OAlininw Contents Advanced Space Propulsion Based on Vacuum (Spacetime Metric) Engineering ....ili Preface and Introduction .......ccccesseueuees Csuseva vase peocousecesesecucesevarsserer cb uvesucureveseersecusecer iii I. Spacetime Modification — Metric Tensor Approach .....scscssenseeseseseseenneeeeeneneesuenanenen i II. Physical Effects as a Function of Metric Tensor CoeffiCients.....ccsssccesesseesee veveres 2 Time Interval, Frequency, Eme@rqy ....ccssssccsscesseeeuscccnesenensnsecesecnueusonseeeenesseneaeceeeenn 3 Spatial Interval ....cccscccscccncncsencnc…

UNCLASSIFIED / /#@2-.055EGiAd=)GE-Oitam Advanced Space Propulsion Based on Vacuum (Spacetime Metric) Engineering Preface and Introduction A theme that has come to the fore in advanced planning for long-range space exploration in the future is the concept that empty space itself (the quantum vacuum, or spacetime metric) might be engineered to provide energy/thrust for future space vehicles. Although far reaching, such a proposal is solidly grounded in modern physical theory, and therefore the possibility that matter/vacuum interactions might be engineered for spaceflight applications is not a p…

UNCLASSIFIED / /#@f-OFFEGEEUSEONET components of potential utility involve very-small-wavelength, high-frequency field structures and thus resist facile engineering solutions. With regard to perturbation of the spacetime metric, the required energy densities predicted by present theory exceed by many orders of magnitude values achievable with existing engineering techniques. Nonetheless, one can examine the possibilities and implications under the expectation that as science and its attendant derivative technologies mature, felicitous means may yet be found that permit the exploitation of the …

UNCLASSIFIED / (POR OPP ECrE USE Oh I. Spacetime Modification — Metric Tensor Approach Despite the daunting energy requirements to restructure the spacetime metric to a significant degree, one can investigate the forms that such restructuring would take to be useful for spaceflight applications and determine their corollary attributes and consequences. Thus we embark on a “Blue Sky,” general-relativity-for-engineers approach, as it were. As a mathematical evaluation tool, the metric tensor that describes the measurement of spacetime intervals is used. Such an approach, well known from studies …

UNCLASSIFIED / / R@R-OFFtGEEUSE-ORTY with the metric tensor coefficients g_ modifying the Minkowski flat-spacetime intervals ay dt, dr, and so forth, accordingly. As another example of spacetime alteration, in a spacetime altered by the presence of a charged spherical mass distribution (Q,m)at the origin (Reissner-Nordstrom-type solution), the above can be transformed into (Reference 11) i 2 3 i feet 2Gi I-Gmirc! | OG {Are c* | 242 _|I-Gmirc* , OG /Anee" | 2 ds - — 5 TT 2 s 1+Gmire 2 (1 +Gmi rc? y l+Gmire 2 (1 +Gmj re? y (5) -(1 +Gm/ rey r {de +sin’? dy") with the metric tensor coefficients g_…

UNCLASSIFIED / AP@R-OPPEGHH-USE-BAEY- TIME INTERVAL, FREQUENCY, ENERGY Begin by considering the case where ./g,, <1, typical for an altered spacetime metric in the vicinity of, say, a stellar mass, as expressed by the leading term in Equation (4). Local measurements with physical clocks within the altered spacetime yield a time interval ./g,,d¢< dr; thus an interval of time df between two events in an undistorted spacetime remote! from the mass—say, 10 seconds—would be judged by local (proper) measurement from within the altered spacetime to occur in a lesser time interval, &y at <dt —say, 5 s…