What I do, if the canister isn't hopelessly mucked up,
is pump on it with a good vacuum pump until it bases to around
100 microns.
With hopelessly mucked up ones, I drill a roughly 1" hole in the
side and use a coathanger to scrape out the beads, and refill with
activated charcoal beads from that 55 gallon drum just down the hall
from where I'm sitting now. (These are scavenged from our cryogenic
pumping system, and they haven't seen much more than vacuum for years.)
I don't know where regular folks get charcoal from, that stuff that
goes in backyard barbeques ain't good for much. Oh the joys of this place!
And the things you can do with liquid Nitrogen! It's the _only_ thing
to use on glued on carpeting, recalcitant wristpins, and pressed-on
starter rings.
Aran Guy guy@bevsun.bev.lbl.gov LBL
Knobtwister and Buttonpusher And me be me
SuperHeavy Ion Linear Accelerator Our opinions
Accelerator and Fusion Research Division Rarely agree.
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