here are my questions
1) how much ultimate vacuum i can achive with a diffusion pump setup
bellow
a) without a cold trap ( and oil backstreaming problem that go's
with it )
b) with a cold trap
c) a cheap an easy way to replace the LN2 coolant for the cold trap
2) the pros an cons of air cooled VS liquid cooled diffusion pump
3) on a liquid cooled VD pump can a radiator with a fan and a
circulator pump be used instead of running faucette water
and at last
4) what is the ultimate vacuum that can be substained in a
permanently seal vessel with or without a getter
ex:( CRT tubes, magnetron tubes, radio tubes, ect, ect, ect )
i hope i do not ask too much questions for my first time but
i am looking to build a small high vacuum pumping station with
used parts and i want the best setup for the least money and easy
to move i want to use this setup for making neon tubes and some
vacuum plating of small parts a small 2 or 3 inch dia VD pump
would be enought for me
any help appreciated
