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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.
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UNCLASSIFIED/ ,'1"1!11'- l!ll"l"!!!lltt tl!!II!! l!IHL"i' - Figure 9. Birmingham University HFGW Detector The INFN Genoa HFGW resonant antenna consists of two coupled, superconducting, spherical, harmonic oscillators a few centimeters in diameter (see Figure 10). The oscillators are designed to have (when uncoupled) almost equal resonant frequencies. In theory, the system is expected to have a sensitivity to HFGWs with size (fractional deformations) of about~ 2x 10·17 (Hz)'½ with an expectation to reach a sensitivity of~ 2x10-20 (Hz/½ (Bernard, Gemme, Parodi, and Picasso (2001); Chincarini and Gemme. (2003)). As of this date, however, there is no further development of the INFN Genoa H FGW detector. Figure 10. INFN Genoa HFGW Detector The Kawamura 100 MHz HFGW detector has been built by the Astronomical Observatory of Japan. It consists of two synchronous interferometers exhibiting an arms length of 75 cm. Please see Figure 11. Its sensitivity is now about 10- 16 (Hz/½ 13 UNCLASSIFIED/ /F81it 8FFIIIAI!: 1!181! &••1::Y
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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.