Chuck:
I moved three at field magnets that I can recall:
A Nalorac 200WB a block across Dana Street from one building to another in
Mountain View with an engine hoist (just me).
An Oxford 300-44 about 10 feet. The magnet "hopped" a little since we were
dragging it across the floor. It lost an X supercon and I had to borrow a
powersupply to reshim it. That went fairly well.
An Oxford 500-54. This is a story! We used Oxford retrofit cast aluminum
pieces to replace the legs (for pressure release on older cryostats, we
never used) and bolted 6, or 8 inch solid rubber casters. Three total. We
had a group of students and a Faculty member to make the move from one
lab. across a hall to another lab. We got to the other lab. very
smoothly until about a foot from the destination. I heard a "chink" and saw
a crack in the casting near me. Some panic ensued, but we got the chain in
place with a minimum of movement and successfully put the magnet on its
legs. The shim of the field was actually improved in the new environment.
Take home message: Yes you can move a magnet at field, but
1. Make sure that the magnet is covered with plastic to KEEP out
Iron filings.
2. The support, casters, or whatever must be capable of holding the weight.
Do not use cast Aluminum.
3. Do not jar the magnet.
4. LHe should be full. LN2 at least 50%.
5. Be prepared to shim, or reenergize. You never know!
IMHO, Lew
On Mon, Jul 11, 2011 at 8:30 AM, Charles L. Anderson, Ph.D. <
Anderson.Charles_at_mail.uh.edu> wrote:
> Hi all,
>
>
>
> Has anyone moved an Oxford magnet cold? If so, what field, how far was the
> move and what conditions or obstacles did you encounter?
>
>
>
> Chuck
>
>
>
> Charles L. Anderson, Ph.D.
> Manager NMR Facilities Office: 832-842-8862
>
> Department of Chemistry Fax: 713-743-2469
> Science Engineering Research Center (SERC) W5009
>
> Cell: 281-841-7588
> University of Houston
> Web: <http://nmr-central.chem.uh.edu/> nmr-Central.chem.uh.edu
> Houston, TX 77204-5003
>
> "Anything one man can imagine others can make true"
> Jules Verne
>
>
>
>
Received on Wed Jul 13 2011 - 19:51:19 MST