Fusion Message Board

In this space, visitors are invited to post any comments, questions, or skeptical observations about Philo T. Farnsworth's contributions to the field of Nuclear Fusion research.

Subject: Re: Vacuum/Earth Trivia
Date: Jul 31, 2:02 pm
Poster: Jim Lux

On Jul 31, 2:02 pm, Jim Lux wrote:

>>Many of us never make a very firm mental link with vacuum, gas molecule density and the Earth's atmosphere and space's lack of one. It turns out that even interplanetary vacuums contain a lot of molecules/cc

The big 25 foot chamber here at JPL can pull down to 5e-6 torr in about 75 minutes. It's actually 27ft in diam x 85 feet high. Talk about pumping speed.. just to keep up with the outgassing from the walls...