Just one detail I'd like to add to the very detailed information people are
kproviding--make sure any plastic around the magnet doesn't block the helium
from exhausting normally and being able to get away from the magnet.
You don't want to build up a significant concentration of helium around the
magnet because it can tend to get through vacuum seals and things and possibly
cause problems. Either leave a hole for the exhaust, or you could use
tubing to route the exhaust somewhere away from the magnet.
Cheers,Mike
On Sun, 9 Mar 2025 at 21:47, Kenneth Sharp-Knott via groups.io wrote:
As part of the restoration of the basement in our building post flooding, it
has been decided to redo the floors in all of the labs. The labs are
painted with a heavy-duty resin based paint. This floor pain was cracking
and chipping before the flood and its decay has been accelerated post flood.
Most labs are empty pending replacement equipment, but the magnets in our
facility survived the flood (the consoles, chillers, etc did not). We have had
3 systems installed since the flood. So, they plan to grind up the
floor as close to the magnets as possible and move the consoles, chillers,
etc. as necessary. The whole thing terrifies me a bit.
Concerns:
- While there will be significant dust mitigation, including 1) heavy duty
vacuum systems attached to the grinders and 2) the magnets, consoles, etc,
will be wrapped in plastic, I am concerned not only about the dust, but
also tiny metal dust from the grinder disc getting into the magnets. =
Does anyone have any experience or recommendation about this part?
- They've asked if they can use the handheld grinders closer to or under
the magnets. I am not sure if this is a good idea. A high rpm
spinning metal disk under the magnet??? How close is safe?
Any advice, suggestions, etc?
Ken Sharp-Knott
Manager of Analytical Services and the NMR Facility
Department of Chemistry
Virginia Tech
(540)267-6502 (Cell)(540)231-0885 (Office)
-=-=-=-=-=-=-=-=-=-=-=-
Groups.io Links: You receive all messages sent to this group.
View/Reply Online (#2144): https://urldefense.com/v3/__https://ammrl.groups=
.io/g/main/message/2144__;!!PvDODwlR4mBZyAb0!V2X_Lwv-vy12hZmevGAkGYDCelZbid=
_1_hqm2l4R4chtb4bjLrSw1YFxlrPEovBM7yqOdLpRWmkG2pRp0N23UgsWXjip$
Mute This Topic: https://urldefense.com/v3/__https://groups.io/mt/111607818=
/7559972__;!!PvDODwlR4mBZyAb0!V2X_Lwv-vy12hZmevGAkGYDCelZbid_1_hqm2l4R4chtb=
4bjLrSw1YFxlrPEovBM7yqOdLpRWmkG2pRp0N23Un4svldB$
Group Owner: main+owner_at_ammrl.groups.io
-=-=-=-=-=-=-=-=-=-=-=-
Received on Mon Mar 10 2025 - 08:42:28 MST