http://iccf15.frascati.enea.it/ICCF15-PRESENTATIONS/S2_O4_Takahashi.pdf
This PowerPoint presentation covers replication of Arata type excess
heat experiments; however, at the end, Takahashi covers his TSC
theory, with something I'd overlooked before. He does *not* predict
23.8 MeV alphas, except as a perhaps minor product in complex
branching that more frequently, apparently, involves emission of
photons by the excited Be-8 nucleus (47.7 MeV) formed by TSC
collapse. The alphas produced may have, he predicts, an energy of
anywhere between 46 keV if the Be-8 makes it all the way to the
ground state, to 23.8 MeV if it decays immediately.
I had not noticed that, according to a source, Takahashi arrived at
his multibody fusion hypothesis initially from observation of neutron
radiation from electrolytic cells. From the Britz bibliography.
Takahashi A, Takeuchi T, Iida T, Watanabe M;
J. Nucl. Sci. Technol. 27 (1990) 663--666
"Emission of 2.45 MeV and higher energy neutrons from D2O-Pd cell under
biased-pulse electrolysis".
** Experimental, Pd, electrolysis, neutrons, tritium, res+
The authors update an earlier report, submitted to Fusion Technol., of
positive cold fusion results; here, they obtained neutron emissions at 2.45
MeV and at higher energies 3-7 MeV, from biased-pulse electrolysis of 0.2-0.4
M LiOD in D2O, with a Pd cathode. Biased-pulse means alternating higher with
lower current densities, e.g. 0.8A with 0.5A at about 2 cm**2, each level for
a couple of minutes or so. Light irradiation simultaneous with either the
high- or the low-level currents was also tried. Water temperature was measured
with a thermocouple, neutrons by a cross-checking system of a (3)He with a
NE213 detector, and tritium in aliquots taken from the electrolyte (to be
reported later). The emissions at higher energies cannot be explained by
hitherto known fusion reactions. 051990|071990
I've been unable to find a copy of this paper on-line. However, in
the recent presentation, there are two pages reproduced from a 1994
paper also in J. Fusion Technology.
However, there is a 1992 paper by Takahashi hosted at lenr-canr.org,
http://www.lenr-canr.org/acrobat/TakahashiAexcessheat.pdf, that
proposes multibody fusion as an explanation of results. There is a
note added to the end of this paper in July 2009:
Note added by A. Takahashi, July 2009The results reported in this
paper were not reproduced well in later runs tried in 1993-1996,
except for one reported at ICCF3 (experiment D2, p. 85). However, I
remain convinced that the
excess heat we observed in 1992 was real, and not an instrument
artifact. The power level was
too high to be an artifact, and the film boiling was visually observed.
In retrospect, it seems likely that the effect could not be
reproduced because nano-structures did
not form on near surface of Pd cathode. The importance of
nano-structures and surface
conditions were not clear at that time.
The levels of neutrons reported in 1992 were low, with lots of noise.
Because there are difficulties in identifying charged particle nature
and energies from incident surface layer analysis of CR-39 in a wet
configuration, and non-wet configuration then suffers from heavy
filtering of the charged particles, I'm going to look for incident
surface charged particle evidence with wet CR-39, but expect that
this evidence will be short of conclusive due to probable chemical
damage. However, it's the other side of the CR-39 that will be of
great interest, because this is beyond the normal penetration depth
for charged particles in the expected energy range, the CR-39 will be
250 microns thick. Thus, on the other side, we should see pitting
from background radiation, plus neutron knock-offs and if we are
lucky, triple tracks from C-12 breakup. To distinguish those tracks
formed during the experiment from those formed previously (or
subsequently) due to radon or thorium or cosmic ray background, an
additional piece of CR-39 will be placed in contact behind the first
piece. Then, only tracks that can be associated between the back side
of the first piece and the front side of the second will be counted,
and background exposure of the material should be rendered largely
irrelevant. In addition, it is possible that analysis of the exact
relationships between the first layer tracks (back side of the first
CR-39) and the second layer tracks (front side of the other piece),
will reveal some information about particle energies.
In the ICCF-15 paper, Side 62, Takahashi predicts, first, the
formation of some energetic tritons at 1.8 - 3.4 MeV, and then that
these would largely hot-fuse with the abundant deuterium nuclei in
the electrolyte or lattice, to generate 10 - 17 MeV neutrons.
The branching from Be-8 formation is quite complex, apparently.
By using a gold cathode, and depending upon the reliability of the
SPAWAR results, I expect to see neutron evidence far above
background, and probably associated with the cathode through track
density study across the surface of the CR-39, the effective
dual-layer detector varying in distance from 250 microns from the
cathode to about 30,000 microns. In order to avoid complicating this,
the platinum cathode that was planned may be abandoned for the
moment; rather, other control experiments will be performed with
cathodes of platinum, silver, or other materials (as well as with H2O
and with and without electrolysis current).
Because it is so easy and cheap to do, I expect to line the entire
interior of the cell with CR-39, two layers thick, and, may, indeed,
fabricate the CR-39, using adhesive designed for the material (I
think this is solvent-bonding, which should leave behind nothing but
the material itself), into a cell lining sleeve, open only on the top.
