So I was looking through the internet on how one could improve the efficiency of a vacuum system (with a diffusion pump). Lots of websites describe systems with, cold traps to remove condensable vapors such as water. If I am not mistaken, cold traps also help prevent back streaming, similar to a baffle. So, I suppose my first question is - how does this all come together in quantitatively? Depending on the pressure level the system is operating at, how do baffles and cold trap affect its pumping speed and capability? If there isn't any easy explanation for that question, would there be any purpose in investigating it? Also, what are some methods people use to improve pumping speed or the pressure levels a system can attain (other than improving the quality of the components in the system). Taking cost into consideration - what would some options be? I'm pretty much new to all of this - so If I'm speaking nonsense here, sorry :P. My "scientific jargon" is probably messed up too. Thanks for any and all answers!