Technol Rep Tohoku Univ: GENERATION OF ANTI-GRAVITY ...

(c)l999 American Institute of Aeronautics & Astronautics
AMA-99-2147
ABSTRACT
We have previously reported on investigations pertaining to the measurements of gravitational field
changes in the vicinity of a large rotating Type II superconducting disk. Published reports indicate that test masses
have been observed to lose up to 2% of their weight when in the vicinity of such rotating disks. We have produced
30 cm (nominal) diameter disks using YBazCu30,., and BiSCCO. In addition we have performed tests on the
interactions between smaller YBCO disks and AC levitation fields and RF fields, using a sensitive gravimeter to
monitor and record the local gravity field above the superconductors. We have not yet duplicated the reported
experimental protocols, including rotation and levitation of a large two-layered YBCO disk. Static disk experiments
to date have uncovered no measurable and repeatable gravity effect for the conditions tested to within the sensitivity
of the gravimeter (which has a noise level on the order of 10 nano-G or less).
FABRICATION OF LARGE BULK CERAMIC SUPERCONDUCTOR DISKS FOR GRAVITY
MODIFICATION EXPERIMENTS AND PERFORMANCE OF YBCO DISKS UNDER EM FIELD
EXCITATION
Ronald J. Koczor, NASA, Marshall Space Flight Center, AL,
David A. Noever, NASA, Marshall Space Flight Center, AL
Background
Attempts to unify theories of gravity with
the other forces of nature have a long and checkered
history. Some of the greatest minds the world of
physics has known have believed that the connection
is there. Clearly at the astronomical scale, gravity
and electromagnetics interacthrough the mechanism
of gravitational warping of space around massive
bodies. Nonetheless, all credible attempts to
experimentally demonstrate that connection on a
laboratory scale have remained elusive. It is clear that
if a manipulative method is found to treat gravity,
extensive changes would occur in our everyday life,
just as our lives changed once electromagnetism was
understood.
In 1992, E. Podkletnov and researchers at
the University of Tampere, Finland, reported ’
demonstration of what he termed “gravity shielding.”
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The experiment consisted of spinning a Type 2
superconductor (yttrium, barium, copper oxide,
YBCO) in the presence of electromagnetic
levitation and rotation fields and measuring weight
changes in test massesuspended above the spinning
disk. The effect reported was small, varying from
tenths of a percent to as much as 2% of the test mass’
weight. A subsequent paper was distributed giving
more details of the experiment. ’
While this is a small effect, it can be recalled
that some of the most telling and seminal
experiments in electromagnetics in the early 19”
century were similarly of small magnitude. Their
value was in demonstrating the basic phenomenon;
useful amplifications and extensions came from
others, once the basic idea had been demonstrated
and accepted.
In 1997 researchers at the Marshall Space
Flight Center, Huntsville, Alabama, and colleagues
began to investigate the Podkletnov experiment. The
goal was to understand various phenomena related to
the experiment and to replicate it. Marshall has a
historical connection to the YBCO material, having
been intimately involved in the first fabrication and
characterization experiments over a decade ago.
While there is general information available
abouto experimental set up, several critical
1.
American Institute of Aeronautics and Astronautics,