From Dr. Melvin Miles:
/"Jones Beene is simply wrong about the accuracy of helium-4
measurements. The laboratories that I used for my samples specialized
in highly accurate helium measurements. The DOI lab in Texas could
easily measure 1 ppb. The Rockwell lab with Dr.Brian Oliver was even
better with an accuracy of 0.1 ppb./"
Ruby
On 9/17/14, 6:41 PM, Jones Beene wrote:
I'm not comfortable being critical of Miles, who is a fine researcher.
And my opinion is not based on anyone's "incompetence" nor is it based
on any particular result - but on a down-to-earth understanding of
mass spectrometers and what the specification and error limits
actually are, and in looking at all the ways that mistakes can be made
at these extremes. It's pretty basic. The challenge of this kind of
measurement was always too great to handle on a small budget, and
still is- when the resources are limited.
Parts per million is the limit of acceptable levels for accuracy. Sure
there are few labs in the world that can possibly do better, but we
are talking about cold fusion researchers with self-made gadgets and
most of this work was done a decade ago. Miles was up against an
intractable problem and we should thank him for being completely up
front about it.
But let's not forget he is talking about a few PARTS PER BILLION. It
does not matter how well or how many times you calibrate -- there is
no acceptable measurement technique which can derive accuracy at this
kind of helium dilution. None of the other 16, 18 or whatever number
of measurements - which have purportedly taken place, were robust
enough to have made the amount of helium which is needed in order to
get the dilution level up to ppm... without extreme "enrichment," and
that is where the problem lies.
Getting the He/D2 ratio higher prior to measurement is what few want
to talk about in detail. To make things worse, much worse -- there is
a technique for bringing samples up from ppb to ppm which is called
"gettering" or NEG (non evaporable gettering). It can introduce order
of magnitude errors.
Jones
--
Ruby Carat
r...@coldfusionnow.org <mailto:r...@coldfusionnow.org>
Skype ruby-carat
www.coldfusionnow.org <http://www.coldfusionnow.org>
