[Fwd: Re: leftover permanent magnets]

[Elliott Wolin <wolin@jlab.org>]

-------- Original Message --------
Subject: Re: leftover permanent magnets
Date: Fri, 02 Jun 2000 15:40:05 -0500
From: Philip Martin <pmartin@fnal.gov>
Reply-To: pmartin@fnal.gov
Organization: Fermi National Accelerator Lab
To: Elliott Wolin <wolin@jlab.org>
References: <39217BEF.50DED340@jlab.org>
<3921872E.EF5AD16C@fnal.gov><392A8CF8.2F0E5FB@jlab.org>
<392AA6BC.F24FD52B@fnal.gov><392AB960.CCC79453@jlab.org>
<392AC186.804D3619@fnal.gov><3937FE21.16E1CB2A@jlab.org>

Elliott-
See my responses, interspersed below, UPPERCASE.  Anything you're willing to
offer
in trade?
Phil

Elliott Wolin wrote:

> Dear Phil,
>
> We're getting even more serious about the leftover PDV magnets.  Now we're
> wondering about details of shipping, etc.  Obviously a lab-to-lab transfer of
> ownership would need to be arranged.  If we decide we really could use them,
> we'd be interested in moving them ASAP.
>
> A few questions:
>
> Have the 5 magnets been in a beam?  Could or are they radioactive?  FOUR HAVE
> BEEN, ONE HAS NOT.  THE FOUR HAVE BEEN OUT OF THE BEAM ENCLOSURE FOR ABOUT 2
> YEARS NOW, SO THEY SHOULD HAVE COOLED OFF CONSIDERABLY AND THEY WERE NOT VERY HOT
> TO BEGIN WITH...WE ONLY RAN LOW INTENSITY BEAM FOR COMMISSIONING THE BEAMLINE.  I
> WILL ARRANGE TO DO A SURVEY EARLY NEXT WEEK TO DETERMINE WHAT LEVEL THEY ARE NOW
> AND WHAT THAT WILL IMPLY FOR SHIPPING.
>
> Are they easily accessible?  Can you get them out quickly?  YES, THEY ARE STORED
> IN AN AREA AWAY FROM THE ACCELERATORS.  THERE ARE MANY OTHER MAGNETS IN THE
> BUILDING WHICH MAY MAKE AN EXACT DETERMINATION OF THE RADIATION LEVELS OF THESE
> PARTICULAR MAGNETS IMPOSSIBLE UNTIL THEY ARE REMOVED FROM THE BUILDING.
>
> Do they need to be crated for shipping, or just loaded into a truck and tied
> down?  I DON'T THINK THEY NEED TO BE CRATED.  THE ENDS SHOULD BE COVERED UP WITH
> HERCULITE OR SOME SUCH MATERIAL JUST TO MAKE SURE NOTHING GETS INSIDE THE POLE
> TIPS TO SCREW UP THE FIELD.
> If they need to be crated, who would do the work?  Could Fermilab crate them and
> drop them onto a truck?  Do we need to supply a crew?  NO.
>
> Would someone from JLab need to come out there anyway, even if Fermilab took
> care of everything?  I DON'T THINK SO.
>
> Any special shipping requirements (air-ride?)?  I WOULD RECOMMEND TRYING TO PAD
> THEM TO MINIMIZE VIBRATION, BUT THAT'S PROBABLY ALL.  How much do you think
> shipping
> would cost us?  I WILL CHECK INTO THIS AND GET BACK TO YOU.
>
> Must they be stored inside?  If so, why (our storage czars will put them outside
> unless we make a case that they need to be inside...we're terribly short on
> inside storage space here!).  HERE IN ILLINOIS THEY WOULD HAVE TO BE STORED
> (LONG-TERM AT LEAST) INSIDE.  JLAB MAY BE DIFFERENT...THE CONCERN IS
> TEMPERATURE.  THEY MUST NOT BE ALLOWED TO GET TOO COLD.  THE STRONTIUM FERRITE
> LOSES SOME OF ITS MAGNETIZATION WHEN IT IS COOLED.  EACH MAGNET HAS BEEN COOLED
> DOWN IN A FREEZER AND THEN HAD THE STRENGTH ADJUSTED.  WHILE THE MAGNETIZATION
> ISN'T CHANGED WITH HEATING UP, (AT LEAST TO REASONABLE TEMPERATURES) I WOULD
> WORRY ABOUT OTHER POSSIBLE EFFECTS.  I THINK A GOOD SPECIFICATION FOR THE STORAGE
> IS THAT THEY MUST REMAIN AT A TEMPERATURE BETWEEN 40 F AND 120 F.  REMEMBER, THEY
> DON'T TAKE ALL THAT MUCH SPACE.  THEY CAN BE STACKED, SO YOU'RE TALKING ABOUT A
> SPACE ONLY 2' X 12' FOR A STACK OF TWO WIDE BY TWO WIDE WITH THE FIFTH ONE ON TOP
> OF THE FOUR.  WE STACKED THEM ABOUT 8 HIGH, BUT YOU WOULDN'T WANT TO DO THAT FOR
> A SINGLE STACK WITHOUT EXTRA PRECAUTIONS.

>
>
> Thanks in advance.
>
>                                 Sincerely,
>                                         Elliott
>
>
> ================================================================================
>
>    Help feed the hungry, one click at a time:  http://www.thehungersite.com
>
>     "Science plays a major role in satisfying the minor needs of mankind"
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