Historical research guide · 0377 · 2010

DIRD High-Frequency Gravitational Wave Communications

DIA / AAWSAP contractor

In one minute

This is the Defense Intelligence Agency’s 2010 study of using gravitational waves as a radio band. Gravitational waves barely interact with matter, so a beam of them goes straight through a planet: the report’s headline example is a link from Moscow to Caracas with no cable, no relay and no satellite. The obstacle is that nobody has yet made or caught one in a laboratory. The author surveys forty-five years of peer-reviewed proposals — fourteen generators, ten detectors — and picks a favourite of each. To transmit, stack rings of infrared-excited pentane molecules so the tiny jerks of an enormous number of molecules add in phase, because the radiated flux grows with the square of the number of stacked plates. To receive, use the Li-Baker detector, which lets a passing wave hand energy to a microwave beam inside a strong magnetic field and collects the new photons that fly off sideways into a quiet region. The report then costs the link, dates the milestones to 2050, and names fusion, propulsion and imaging as the applications beyond talking.

Connection

Chapter 8’s Navy high-frequency gravitational-wave generator patent belongs to exactly this research line, and this report is its open engineering statement — what would be built, at what amplitude, and what result would count as the Bell-and-Watson moment. Its closing section is also an official statement of chapter 12’s most striking idea: a gravitational wave focused hard enough on a deuterium molecule pulls the two nuclei two hundred times closer together, and they fuse.

From the source

Gravitational waves have a very low cross section for absorption by normal matter, so a high-frequency gravitational-wave link can carry information directly through the Earth with effectively no absorption — Moscow to Caracas with no fibre optic cable, microwave relay or satellite transponder — and because the beam is extremely narrow it has a very low probability of interception.Summary, p. v; Section 1.1, p. 1
Fourteen laboratory high-frequency gravitational wave generators have been proposed in peer-reviewed journal articles over forty-five years, and ten detectors since 1978; the most promising generators are those using very large numbers of sub-microscopic radiating elements, because the radiated flux grows as the square of the number of in-phase elements, a result proved from general relativity by Romero and Dehnen.Summary, p. v; Sections 2.1.1 and 2.1.2, pp. 2-6
For the proof-of-concept test the report proposes 1.8 x 10^8 magnetron-energized film bulk acoustic resonators giving 0.066 W of gravitational-wave power; for an operational transmitter, a 12.5-metre stack of 10^7 plates of infrared-excited pentane rings gives a flux of 1.48 x 10^14 W per square metre in a 2.3 x 10^-4 radian needle beam, which after 7,000 km through the Earth arrives at about 3 W per square metre and, by Shannon’s equation, supports about 1.9 x 10^6 bits per second.Sections 2.1.3 and 2.1.4, pp. 6-11; Section 3.2, p. 25
The Li-effect, first published in 1992 and treated in at least nine subsequent peer-reviewed papers, is a first-order coupling: under synchro-resonance a gravitational wave hands energy to a superimposed microwave Gaussian beam in a static magnetic field and produces detection photons travelling at right angles to both, into a region that can be made essentially noise-free — unlike the second-order inverse Gertsenshtein effect used by earlier detector designs.Section 2.2.2, pp. 14-16
The Standard Quantum Limit computed for the Li-Baker detector at 10 GHz is 1.8 x 10^-37 m/m, far below the instrument’s design sensitivity of about 10^-32 m/m, so the detector would be photon-signal limited rather than quantum-noise limited.Section 2.2.3, Equation (10), p. 19
The most striking applications lie beyond communication: an ultra-high-intensity gravitational-wave flux focused on a deuterium molecule is calculated to reduce the separation of the two nuclei by a factor of two hundred so that they fuse, gravitational-wave generators could raise a static gravitational-field gradient that a craft falls forward into, and because the waves pass through matter while their polarisation and phase velocity are modified by it, they could image within and below structures and inside the Earth.Section 4.4, pp. 36-37

The way in

https://documents2.theblackvault.com/documents/dia/AAWSAP-DIRDs/DIRD_21-DIRD_High-Frequency_Gravitational_Wave_Communications.pdf

Historical source-access record. This guide links to the original; it does not reproduce the paper text.

Defense Intelligence Reference Document, Acquisition Threat Support. DIA-08-1004-005, 6 April 2010 (ICOD: 1 December 2009), produced under the Defense Intelligence Agency Advanced Aerospace Weapon System Applications (AAWSA) Program. Released under FOIA and published by The Black Vault. AUTHOR. The author’s name is withheld under FOIA exemption (b)(6). Internal evidence only: the report is organised around the Li-Baker detector and its Chinese and US patents, cites R. M L Baker, Jr. of Transportation Sciences Corporation on nearly every page, describes Appendix B as a joint Louisiana State University and Transportation Sciences Corporation design project, and its acknowledgements thank Gary Stephenson of Seculine Consulting for research that was crucial to the study. That is an inference from the text, not an attribution. TEXT. The Summary and Sections 1.0 through 5.0 are reproduced in full. The document carries a copyright warning against further dissemination of its photographs, so the twenty-seven figures are not reproduced; the argument they carry is stated in the surrounding text. Equations that the scan renders illegibly are given in words or in inline notation rebuilt from the definitions in the text. The numbered reference list (pages 37 to 43), Appendix A (nomenclature), Appendix B (the detailed Li-Baker detector design plan) and Appendix C (a reprinted paper by Li and colleagues on perturbative photon fluxes) are omitted for length; the complete document is at the source.

How to cite it

DIA / AAWSAP contractor (2010) DIRD High-Frequency Gravitational Wave Communications https://documents2.theblackvault.com/documents/dia/AAWSAP-DIRDs/DIRD_21-DIRD_High-Frequency_Gravitational_Wave_Communications.pdf

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