Re: lunch with darwin
- From: "hhc314@xxxxxxxxx" <hhc314@xxxxxxxxx>
- Date: Tue, 17 Jul 2007 17:07:51 -0700
On Jul 15, 10:07 pm, "Tim Williams" <tmoran...@xxxxxxxxxxx> wrote:
<hhc...@xxxxxxxxx> wrote in message
news:1184548947.779227.149360@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
After all, he taught kids how
to convert a disgarded refigeration compressor to a vacuum pump, then
how to use it to produce x-rays or how to accelerate electrons and ion
particles to an energy that would induce a nuclear reaction.
With a homemade diffusion pump, no doubt.
I was unaware refrigerator pumps were rotary vane and equipped with vacuum
oil.
Likely, he also told how to synthesize, distill and purity silicone vacuum
oil, huh?
Yeh...sceptical? Sure as hell! It's a damn hard vacuum to do particle
experiments. Mere gas discharges are pretty easy by comparison (militorr or
so).
Not to say vacuum apparatus isn't that hard to use, you just need it, and
it's a good couple hundred dollar investment. Good vacuum oil isn't cheap!
Tim
--
Deep Fryer: A very philosophical monk.
Website @http://webpages.charter.net/dawill/tmoranwms
On Jul 15, 10:07 pm, "Tim Williams" <tmoran...@xxxxxxxxxxx> wrote:
<hhc...@xxxxxxxxx> wrote in message
news:1184548947.779227.149360@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
After all, he taught kids how
to convert a disgarded refigeration compressor to a vacuum pump, then
how to use it to produce x-rays or how to accelerate electrons and ion
particles to an energy that would induce a nuclear reaction.
With a homemade diffusion pump, no doubt.
Yep, John Strong;s books and Scintific American articles taught his
reader to do just that.
I was too lazy to build one myself, so I have a 3" CVC oil diffusion
vacuum pump that I purchaed as surplus from Forrestal Research Cen
I was unaware refrigerator pumps were rotary vane and equipped with vacuum
oil.
Actually all of the small pumps contained in regrigerators ar of the
roatary vane type. Piston type refiteration pumps are rarely
encountered except on very large refigation sytems, in in fact they
are still used.
Likely, he also told how to synthesize, distill and purity silicone vacuum
oil, huh?
No, but in his "The Amateur Scientist" column in Sientific American"
an in his book "The Amateur Scientist". he did on a step by step basis
explain how to purge the compressor from the refrigeation oil
contaomed and how to replace it with Weclh "Duo-Seal" vauum pump oil.
Tim, I had to net the name correct, so I just dug out a bottle. If you
want to know the name of the oil commonly used for oil diffusion
vacuum pumps, you can bet your life that I have some of that too.
Oh my God, I just look for my oil difussion pump supply and it was not
in the cabinet. Still, it's stuff called "Otoil" and it pull down a
vacuum to 10 to the -6 or 7 Toor level, or what was traditionally
called mm/Hg. Trust me in telling you that a vacuum of 10 to the minus
7th allows particle beams of electron or protons to travel many feet
without meeting any obstructing partiles.
Yeh...sceptical? Sure as hell! It's a damn hard vacuum to do particle
experiments. Mere gas discharges are pretty easy by comparison (militorr or
so).
Correct Tim. Still realize in order to support my family, my living is
not based on fireworks. On the day job, I work as a phsicist and/or
engineer. Depending on the day or month, I design nuclear particle
accelerator, and on other days nuclear weapon sytems.
Tim, just to clue you in, many of the posters here that casually post
about fireworks have lives much removed from that. Several of who post
here are scientific professional, a couple are physician, and there
are several very wealthy businessmen and investers scatter among the
random poster.We all come here simply to have fun and to share common
interests. Many of us also know each other rather well. There are
surprised lurking everywhere in this newsgroup.
Never assume anything here.
pretty familiar with both basic and theorital chemist, but have only aFrom what you have posted in the past, I have concluded that youi are
limited experience with fireworks. Nothing wrong wih that. You also
appear to have a basic grasp of physics, which you may have aquired
while a chemistry student in college. I'm inclined to believe that
your knowledge of physicsic is roughly equivalent to mine of
chemistry, since we physicist are required to take more courses in
chemistry than we would have preferred to do. Still, my limited
knowedge of physical chemistry and qualitative analysis does come in
handy at times. Still, I would never try to bluff a chemist on
chemistry knowledge, and it might be a very good idea not to try to
bluff a degreed physics on his home turf.
That said, John Strong's montly "Amateure Scientist" column in
Scientific American and his book was the very fountainheard that
encouraged many kids to ultimaely pursue science as a career. I know
of nothing before or since that has ever come close.
Today, the dumbing down of America coupled with the prevailing PC
attitudes would prohibit the publication and distribution of such
writing.
I learned to make Zink Dust/Suflur rochets from John's articles, and
once constructed a partile accelerator that no doubt resulted in some
degree of radiation poisoning. I hand ground my first telescope from
his instructions. The only reason that I no longer own a copy of his
book was that I gave it to my son when he turned 12.
Yes indeed, high vacuum systems are not cheap, but with sufficint
effort they can be constructed with a lot of labor.
Harry C.
.
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