Dipanjan,
We have had similar situation for almost 12 days and we simply
covered the magnet with thick plastic sheets, as the work was only
painting of the lab. In your case if renovation is going to be done, it is
best to be blocked with wooden sheets and keep the helium boil off pipe
out of that small volume. This will ensure safe operation of magnet!
Off course, remember to fill magnet with Liq. Nit. regularly and
He as well if it is scheduled during that period.
Best luck.
L.S.Mombasawala.
NMR laboratory,
RSIC,
Indian Institute of Technology,
Mumbai 400 076
__________________________________________________________________________
On Tue, 9 Apr 2002, Dipanjan Nag, Ph.D. wrote:
> Hello All:
>
> Currently we are going through a renovation in the Department. Several
> magnets in the labs have to be blocked off from the renovation workers. We
> are planning to cover up our 200, 300 and 600 MHz magnets with 3/4" plywood
> planks all around. The plywood pieces would be put together using 2X4s and
> stainless steel/alumunium screws. They also have to be covered up with
> plastic sheets around the plywood covers to ensure that dust doesn't get in.
>
> 1. My concern is that if we seal off the plywood boxes will we harm the
> magnets in anyway by creating a micro-environment of low/high pressure area?
> 2. We will obviously have the plywood on the top and front detachable so
> that we can do the cryogen fills.
> 3. Workers will be working there for couple of weeks, can we keep the
> magnets "sealed" with plastic and plywood for so long?
>
> Any help/suggestion will be greatly appreciated.
>
> Regards,
>
> Dipanjan
>
> Dipanjan Nag, Ph.D.
> Director of Instrumentation
> University of Nebraska-Lincoln
> Department of Chemistry
> Lincoln, NE 68588-0304
> Phone:402-472-6255
> Fax: 402-472-6964
>
>
>
Received on Tue Apr 09 2002 - 18:15:49 MST