Documents / Report

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. 4 …Change in Centrifugal Force of Orbiting Masses, .dfct, Replaced by Change in Tangential Force, Aft, to…
  • p. 5 …cannot be shielded or shadowed by planetary masses. Plasma interference seen at planetary entry would be…
  • p. 8 …Change in Centrifugal Force of Orbiting Masses, b.fc1, Replaced by Change in Tangential Force, 4ft…
  • p. 9 …as the particles move through a target mass. The usual difficulty with HFGWs generated by nuclear…
  • p. 10 …to an individual slice, P and its mass, m would be both one hundredth of their…
  • p. 13 …radiation pattern for a pair of orbiting masses. GW l I T GW Figure 4. Radiation…
  • p. 14 …The mass density of pentane is divided by its molecular mass and that gives the density…
  • p. 17 …In 1995 Tobar characterized multi-mode resonant-mass HFGW detectors and three years later in 1998…
  • p. 22 …E/c2 may be substituted for mass in an energy only system. This is depicted in…
  • p. 36 …as strongly affected by the presence of mass. Such a differential propagation delay comparison (between RF…
  • p. 41 …The concept is that the mass essentially "rolls" down a "hill" produced by the static g…
  • p. 47 …V. (2009a), "Lessons for Energy Resonance HFGW Detector Designs Learned from Mass Resonance and Interferometric LFGW…
  • p. 48 …Tobar, M, 1729-1736 E. (1995), "Characterizing multi-mode resonant-mass gravitational wave detectors," Journal of…
  • p. 49 …pairs of oppositely jerking at one-time mass elements, integer power of the generated gravitational waves…
UNCLASSIFIED/ ,'FSA: OFFHil.tzL 1!181!! 8HL'f
Ll is an ideal location for solar monitoring, whereas L2 is permanently shielded from
the sun.
4.0 Future Potential
4.1 DEVELOPMENTAL ROADMAP
A development roadmap is suggested here for the application of High Frequency
Gravitational Waves (HFGWs) in the field of communications. The development
roadmap should be twofold:
• Theoretical work should continue on HFGW transmitters (generators) and receivers
(detectors).
• Experimental devices should be built and tested in the laboratory and then
transitioned over to a practical communications system.
A suggested developmental roadmap schedule and phasing timeline is included as
Figure 24. Theoretical research is always an ongoing enterprise, but it is especially
important to encourage work in the development of experimental approaches aimed at
demonstrating laboratory generation and sensing of gravitational waves for the next
few years. This is the kind of academic work that is best done in a research university
setting, at least for the next ten years or so, until laboratory experiments can verify
laboratory generation. Without early confirmation the technology will not gain
widespread acceptance and move forward.
GW Communications Development Timeline Estimate
Decade 201X 202X 203X 204X
Years ,,,,, 20 a 30 2035 2 '° 205
Devic,;
Program Mileston,;s ~ '"
'
Prolotyp,; Design
a-Ahead Go-Ah,;ad @ Ga- No
EMDB,d @ Production Spac,; Syst"/QJlst Space
!No-Bid Award Go- Ah..ad Deliver
"''°Perform ........................ ......................... ........................Experimental Exp. Research
R,;search ........................ ......................... ........................
1(JZS
----------- ---------------------------- --------------------------
Perform
Prototype I Protot Develonment ----------- ------------------- ------- --------------------------
Development
2035
Device Device Development
Development
2040
Applications 4pp/ications Developmen
Development Interplanetary
Upgrade/
2035 Delivery
System J}
"'Applications Delivery Applications Production
Production
& Upgrades
Figure 24. HFGW Com Space Application Development Roadmap, Estimated Timeline
32
UNCLASSIFIED/ ,sralil 8FFIIIAI!: 1!181! .....y

Not linked to a story yet.

About this file

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.