<Noxz>
wow, google doesn't know mtorr meant milli torr, so when I was saying "10mbar to mtorr" it came back as torr so I was a thinking stuff was better than it was, without reading it said torr
<sync>
yes
<sync>
:D
<Noxz>
like jesus christ, google
<Noxz>
it's what allowed me to look at diaphragm pumps again, I even got my mini one and disassembled it to verify what was up
<sync>
you can pump turbos with a wobl pump, but they usually are not made for very low pressures and or high massflow
<Noxz>
I just really dont like the idea of oil mist (even with a filter???) coming up into a mass spec or coating the turbo
<Noxz>
I'm still sorta kicking myself that the kid sold the rv12 pump :/
<sync>
well then get a scroll pump
<sync>
but be aware that they will wear out quickly if you cycle them often
<Noxz>
doh
<Noxz>
are the filters for oil pumps any good?
<Noxz>
oil=vane
<sync>
they help, but they are not great
<sync>
but it depends on what you do
<sync>
in general, you'll be fine
<sync>
if oil contamination is an issue you can always change to another type of pump and clean everything
<Noxz>
I'm likely looking at atleast 3 applications... SEM, Mass Spec, and Metal Deposition (via maybe 2 ways, sputtering and evaporation)
<sync>
none of those is critically sensitive to oil
<Noxz>
maybe not in the home lab...
<Noxz>
I thought mass spec was fairly sensitive.. but maybe it depends where the turbo is placed?
<sync>
no, but again it depends on what you do, you will see some peaks that belong to the oil but in general you can get away with it
<sync>
if you want to do srs bsnz mass spec, you will need to get a commercial unit anyway
<Noxz>
well, the idea is to make my own tripple-quad
<Noxz>
that's one of the big projects
<Noxz>
w/ the turbo setup
<Noxz>
which I am still waiting on dude to post it
<Noxz>
will likely click buy once he does though, nothing else on there is a fulls etup like he is offering
<Noxz>
but I wonder if his 1mtorr vane pump would actually work well for it or not.. and I havent found anything in a decent price range on there that can do less
<Noxz>
just a thought and looking a little on the internet, havent found too much yet beyond "probably not" .. if the tesla turbine could work as a vacuum pump, to any real degree
<sync>
it is not a positive displacement pump so it cannot work at high pressures and it has only one aperture so it will be a very bad turbopump
<Noxz>
right, just another turbine.. k
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<sync>
yes, also how to spin it?
<Noxz>
motor
<Noxz>
that's how all these other pumps are spun
<Noxz>
people usually demo it with compressed air spinning it and measure the rpm, not too much on the ways of showing it as a genny or in reverse operation(via a motor)
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<kanzure>
yes it's still active
<mircea_popescu>
orly ?
<mircea_popescu>
!~seen azonenberg
<mircea_popescu>
god damned no bots omfg how do people live.
<Noxz>
he pops onto the chemistry channel from time to time
<Noxz>
he was making a solid-state camping fuel chunk
<Noxz>
but, not often
<mircea_popescu>
aha.
<Noxz>
I haven't seen too much discussion of ongoing projects, beyond my own.. I could be mistaken though.. but I certainly get some questions answered.. currently working towards a high vacuum system
<diginet>
Noxz: I am slowly working on my own photoresist
<diginet>
but I recently moved, so the project is on the backburner, still getting settled in
<Noxz>
diginet, I am likely going to try to make my own PMMA with my own chlorobenzene
<diginet>
Noxz: why PMMA, are you going for electron
<diginet>
?
<Noxz>
Yeah, one of the projects with the vacuum is going to be a Scanning Electron Microscope
<mircea_popescu>
interesting.
<Noxz>
kid hasn't posted the turbo yet
<diginet>
who?
<Noxz>
some kid that made a fusion reactor ;)
<diginet>
oh
<Noxz>
15 year old
<diginet>
plenty have
<Noxz>
who has a bunch of leftover vacuum stuffs
<diginet>
fusion doesn't interest me
<Noxz>
nah, but his turbomolecular pump + controller+ coolant lines etc etc etc does
<diginet>
I am intentionally designing a vacuum free process
<Noxz>
I use vacuum for chemistry stuff often enough, that going lower shouldn't be all too difficult
<Noxz>
a little annoyed with prices though
<Noxz>
and oil mist
<Noxz>
(the idea of, mist)
<diginet>
oil-less is the way to go if you can
<Noxz>
yeah, looks like scroll pump will be the only kinda that can really deliver on it
<Noxz>
as a roughing pump
<diginet>
a turbomolec can use a diaphragm pump as backing
<diginet>
it must have a molecular stage though
<diginet>
I am interested in the challenge of a vacuum-free process though
<diginet>
my apartment doesn't have room for a ton of equipment, and I'm on the fourth floor of a walk up
<Noxz>
I will be converting a bedroom into a lab, I wanted to make a shed outside, but property lines are a bitch
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<diginet>
yeahhhh
<Noxz>
looks like the available turbo pump actually wants an oil-free diaphragm of <= 5 mbar (3.75 torr)
<diginet>
that sounds good
<mircea_popescu>
why not just buy / rent a warehouse ?
<diginet>
$$$
<diginet>
and convenience
<mircea_popescu>
i c.
<Noxz>
and being in your house is convienient
<Noxz>
like, I have a dog
<Noxz>
and these experiments would be at night
<mircea_popescu>
let me put it another way : if you actually prefer living in a warehouse, why are you not.
<Noxz>
some warehouses dont like night time work
<Noxz>
others run on night time, lol
<Noxz>
warehouses are not for living ;)
<mircea_popescu>
says who ?
<Noxz>
yuo get kicked out for 'squating'
<Noxz>
if anyone finds out
<mircea_popescu>
eh get out. recall the "artist collective" that nearlyu burned to death ?
<diginet>
I can't even imagine what a warehouse would cost to rent in NYC
<mircea_popescu>
whole schtick of these is "get people living in warehouse".
<mircea_popescu>
diginet so rent it in nj like everyone has done since forever.
<Noxz>
mircea_popescu, I do, because I was there setting up a rave a month before....