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This Defense Intelligence Reference Document was prepared by the Defense Intelligence Agency under its Advanced Aerospace Weapon System Applications (AAWSA) program, is dated 6 April 2010 and is part of a series of advanced technology reports produced in FY 2009. It reviews proposed laboratory generators and detectors of high-frequency gravitational waves for communications. It favors an infrared-excited molecules transmitter and the Li-Baker detector, estimating about 1.9 million bits per second over 7,000 km through the Earth. It also discusses timing standards and interplanetary navigation uses.
“BEAMS”17 pages
UNCLASSIFIED//F811. 8FFll!l*L 1!1!11! 9HL"i' According to Cruise (2008) of Birmingham University its frequency is limited to 100 MHz and at higher frequencies its sensitivity diminishes. In the case of the Infrared-excited molecules approach, on might employ a variant of the Robinson Gravitational Wave Background Telescope for the receiver or detector (Yoon, et al., 2006). It is a bolometric large angular scale Cosmic Microwave Background (CMB) polarimeter, but might possibly be modifiable for direct HFGW detection. ll'.',;[\'l·.H..'->ri l ,,1 BllDll:'-(,11.\.\1 Development of 1 00MHz GW detectors at National Astronomical Observatory of Laser Photo fldetector Japan ~~ • -'~-o - r -Re~;~;.~~ , mirror Two synchronous recycling .tf> interferometers were built! Figure 11. The National Astronomical Observatory of Japan 100 MHz Detector 2.2.2 Concept (Li-Effect} The Li-Effect was first published in 1992 and subsequently, some nine peer-reviewed papers have been published concerning it including a capstone paper, Li, et al. (2008) included as Appendix C. The Li-Effect is very different from the classical (inverse) Gertsenshtein-Effect. With the Li-Effect, a gravitational wave transfers energy to a separately generated electromagnetic (EM) wave in the presence of a static magnetic field. That EM wave has the same frequency as the GW and moves in the same direction. This is the "synchro-resonance condition," in which the EM and GW waves are synchronized (move in the same direction and have the same frequency) and is unlike the Gertsenshtein- Effect. The result of the intersection of the parallel and superimposed EM and GW beams, according to the Li-Effect, is new EM photons moving off in a direction perpendicular to the beams and the magnetic field directions. Thus, these new photons occupy a separate region of space (see Figure 12) that can be made essentially noise-free and the synchro-resonance EM beam itself (in this case a Gaussian beam) is not sensed there, so it does not interfere with detection of the photons. This Li-Effect was utilized by Baker (2001) in the design of the Li-Baker HFGW detector and Chinese Patent (Baker, 2000) of a device to detect HFGWs, the innovative Li-Baker HFGW Detector. 14 UNCLASSIFIED/ ,"F811. 8FFll!l*L 1!181! 811L¥
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Report, from the dia collection. The PDF is mirrored here; the original link is under it. 57 pages are in the text index: search them above, or from the library's search.