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Defense Intelligence Reference Document High-Frequency Gravitational Wave Communications

Defense Intelligence Agency · 57 pages · text from the file's own layer

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.

  • p. 8 …Please recognize, however, that !1f need NOT be a gravitational force (see Einstein, 1918; Infeld quoted…
  • p. 9 …The usual difficulty with HFGWs generated by nuclear reactions is the small dimensions of their nuclear…
  • p. 11 …It is an extremely small HFGW amplitude, but possibly a detectable signal. 2.1.2 Alternative…
  • p. 17 …This detector was conceived to be sensitive to relic HFGWs (HFRGWs) having amplitudes as small as…
  • p. 31 …Each remote terminal would need to be equipped with a small HFGW receiver, which could pickup…
  • p. 32 …Therefore mobile devices, such as portable remote spaceborne terminals could be typical users of such a…
  • p. 54 …In a development of this, a number of small ( ~6cm diameter) solenoids could be stacked along…
  • p. 55 …around 2T over small volumes so that superconducting magnets are expected to be used here. Cryogen…
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This is the minimum functionality required to constitute a communication link. Signal
strengths of the respective GW generators would need to be sufficient to overcome link
loss, coupling losses, and noises sources. Signal to noise considerations and link
budgets are covered in further detail in Section 3.1.
2.1 HFGW GENERATORS {TRANSMITTERS)
2.1.1 HFGW Generator Concepts
Several sources for HFGWs or means for their generation exist. The first generation
means is the same for gravitational waves (GWs) of all frequencies and is based upon
the quadrupole equation first derived by Einstein in 1918. A formulation of the
quadrupole that is easily related to the orbital motion of binary stars or black holes,
2
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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.