[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: Do we need to keep the large Helmholtz coil setup? (fwd)



We are at the stage of emptying the transportainers asd scraping out 
items. If no one wants the box it will disappear. Doug   :-)    . This 
is Thurs 11/18/04 it will do it's vanishing act next week early.

Elton Smith wrote:

>Hello Friends,
>
>Any comments on needs for the use of a the large helmholtz coils setup?
>
>Cheers, Elton.
>
>Elton Smith
>Jefferson Lab
>elton@jlab.org
>(757) 269-7625
>
>---------- Forwarded message ----------
>Date: Thu, 11 Nov 2004 15:21:30 -0500
>From: Carl Zorn <carl.zorn@jlab.org>
>To: Dave Mack <mack@jlab.org>, Elton Smith <elton@jlab.org>,
>     Bogdan Wojtsekhowski <bogdanw@jlab.org>
>Subject: Do we need to keep the large Helmholtz coil setup?
>
>Thursday, November 11, 2004
>
>Greetings.   I consider you three as my prime contacts with the Halls
>(A, B, C and D).  As you are no doubt aware, there is a movement afoot
>to clean out "all the old junk" around the lab - unless it has some
>real use.
>
>Back in 1993-94, the Detector Group put to together a large (about 6 ft
>cubed) helmholtz coil system to test some 3 inch phototubes for Hall B.
>   Drew Weisenberger and Brian Kross were the principal builders of it.
>Elton was the P.I. on the project that used of the setup.  An internal
>CLAS note (94-008) was published and is available for download
>(http://www.jlab.org/Hall-B/notes/clas_notes94.html).   Drew tells me
>that there were probably other users but I can't track down any
>documentation.  For some years now, the system has been stored in a
>Hall B trailer sitting outside the experimental hall.
>
>The device is not capable of field much beyond 20-30 gauss, but the
>point was to create a large uniform volume (usefull especially for the
>big PMTs).  The "black box" in the centre has a unique gimbaled setup
>to allow for 2 degrees of freedom - "pitch" and "roll".  It also has
>inputs for a set of pulsed LEDs.  I imagine that the coil setup would
>need serious upgrading for larger field tests
>
>As it stands right now, Hall B will be getting rid of it, and Property
>Management has told me that there is no extra room for something of
>this size.  Any interest in keeping it?
>
>
>All the best,
>
>..............Carl
>
>carl.zorn@jlab.org
>757-269-7449 (office)
>757-584-7449 (pager)
>
>  
>