01:15 <Helldesk> what kind of vacuum pumps do you guys have or use? do you have cryo pumps or do you just avoid processes that require a high vacuum?

02:12 <azonenberg> Helldesk: I do not have a vacuum pump yet

02:13 <azonenberg> been using an evaporator on campus for metal deposition (mechanical + diffusion with a cryotrap)

02:13 <azonenberg> I want to build a similar rig of my own

02:13 <azonenberg> time frmae 6 mo - 1 yr

02:50 <Helldesk> yeah, that's what I've seen in use too - and a cryotrap is expensive

15:01 <lekernel_> isn't a cryotrap just some liquid nitrogen (10 cts a liter) cooled device with zeolite in it (costing 40E for a typical load)?

19:55 <azonenberg> lekernel: Yes

19:56 <azonenberg> The main expensive part is the diffusion pump

19:56 <azonenberg> But that's still cheaper than a turbo by far

22:06 <Helldesk> what does the zeolite do?