AAWSAP DIRD, High-Frequency Gravitational Wave Communications, April 2010

Text

This text came with the file. It may have mistakes. When the text and the image disagree, the image is right.

UNCLASSIFIED//iiOlil OiiiilCI0L Llili QPIL¥
4.4 OTHER POSSIBLE HFGW APPLICATIONS
The most stunning advances in HFGW applications will probably not be in
communications, but in the remotely HFGW-generated nuclear fusion, HFGW propulsion
and HFGW surveillance. If an ultra-high-intensity HFGW flux impinges on a nucleus, it is
possible that it could initiate nuclear fusion at a remote location, or mass disruption.
Also it may be possible to create radioactive waste-free nuclear reactions and energy
reactions (Fontana, G. and Baker, R. M L, Jr. 2007). As they suggest: "At high
amplitudes, GR (Gravitational Radiation) is nonlinear, thus we might expect a departure
from geometric optics. Fortunately, the problem has been already theoretically
examined and the resulting effects are found to be advantageous. Nonlinearity
improves the focusing process and h goes to one in finite time, producing a singularity
"regardless" of the starting, non-focused amplitude of the impinging gravitational wave
(Corkill and Stewart, 1983; Ferrari, 1988a; Ferrari 1988b; Ferrari, Pendenza and
Veneziano, 1988; Veneziano, 1987; Szekeres, 1992). The effect of a !),.h = 0.995 pulse
of HFGWs on the couple formed by a deuterium nucleus and its electron is the reduction
of their relative distance by a factor of 200. If this distance reduction is effective for a
few picoseconds, then the two nuclei of a deuterium molecule can fuse and give an He
atom plus energy, which is the usual nuclear-fusion process in a star."
HFGWs could theoretically be used for propulsion and control of the motion of objects
such as missiles, missile warheads, spacecraft, and asteroids, and remote control of
clouds of hazardous vapors. Gravitational field changes by one or more HFGW
generators could urge a spacecraft in a given direction, causing a lower static
gravitational field in front of a vehicle (it "falls" forward) and a higher one behind
(providing a "push"). The concept is that the mass essentially "rolls" down a "hill"
produced by the static g-field; that is, potential energy increase of a mass is provided
by the energetic HFGWs. The magnitude of the static g-field is proportional to the
square of the HFGW frequency (Landau and Lifshitz, 1975, section 108, page 349).
Specifically:
"Since it has definite energy, the gravitational wave is itself is the source of some
additional gravitational field (static g-field). Like the energy producing it, this field is a
second-order effect in the hik. But in the case of high-frequency gravitational waves the
effect is significantly strengthened: the fact that the pseudotensor tik is quadratic in the
derivatives of the h ik introduces the large factor )...-2. In such a case we may say that the
wave itself produces the background field (static g-field) on which it propagates. This
[static g] field is conveniently treated by carrying out the averaging described above
over regions of four-space with dimensions large compared to A. Such an averaging
smooths out the short-wave "ripple" and leaves the slowly varying background metric
(static g-field)." (Brackets and underline added for clarity and emphasis.)
Such an application must also await the future development of very high-intensity
HFGW generators.
A novel means of imaging or HFGW surveillance might be developed in future to
establish a system to allow for observing activities and materials in three dimensions,
within and below structures and within the Earth and its oceans. Gravitational waves,
including HFGWs, pass through most material with little or no attenuation; but although
they are not absorbed, their polarization (Li and Nan, 2009), phase velocity (causing
UNCLASSIFIED//FOR OiiiilCl.t.k HSI!! eflti
36