[TCML] parker globe for sale
evp at pacbell.net
Sat Aug 22 14:51:59 MDT 2009
What about cleanliness of plastic globes such as the cheapie I
bought from Radio Shack? At least 10 years old and still looks "as good
1 atmosphere = 760 Torr = 760 mmHg
"Most plasma spheres operate in the range of 5,500 to 7000 microns. Air
being 7600 microns (no vacuum at all).
I use xenon, argon, helium, krpton in my mixtures.
The container cleaning is the problem issue. You have to bake it at high
temp for 24 hrs before filling. Also, use a 60 kV discharge in Argon gas to
microscopically "clean" all the residuals off the interior walls. Failing
to take this step can result in a fuzzy ball after a few months as the
plasma dislodges molecules adhering to the glass internal walls.
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