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Alex,<br>
If you do rotate some of the probes, remember that very precise
angular alignment is necessary in order that the horizontal
components not be swamped by the much larger vertical field. They
should be tested in the uniform field region (where they should read
close to zero.)<br>
Dan<br>
<br>
<div class="moz-cite-prefix">On 2/26/2014 9:06 AM, Alexander Somov
wrote:<br>
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<blockquote cite="mid:Pine.LNX.4.64.1402260859530.18225@jlabl1.jlab.org" type="cite">
<pre wrap="">
Hello Richard,
As there are 5 hole probes mounted on the mapper (1 cm apart from
each other), I think that it would make sense to rotate 2 of them to
measure Bz and Bx just for consistency check. As the mapping
area is small, I would make the step size 1 cm.
If TOSCA agrees well for By, we'll use the whole map from TOSCA.
Cheers,
Alex
On Wed, 26 Feb 2014, Richard Jones wrote:
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<pre wrap="">Alex,
The plan looks good. You ask at the bottom of the page whether one can
rotate two of the probes to measure Bx and By. You should be able to
compute those from a map of Bz only, using the symmetry of the field and
the fact that (del x B) = 0 in the region outside the coils and the iron.
Is that what you want to check?
-Richard J.
On Tue, Feb 25, 2014 at 9:26 AM, Alexander Somov <a href="mailto:somov@jlab.org"><somov@jlab.org></a> wrote:
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Hi,
I've started putting requirements for mapping
the PS magnet to
<a href="https://halldweb1.jlab.org/wiki/index.php/Plan_for_mapping_PS_magnet">https://halldweb1.jlab.org/wiki/index.php/Plan_for_mapping_PS_magnet</a>
Please take a look.
Cheers,
Alex
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<br>
<div class="moz-signature">-- <br>
<font color="#ff0000"><i>Daniel Sober<br>
Professor<br>
Physics Department<br>
The Catholic University of America<br>
Washington, DC 20064<br>
Phone: (202) 319-5856, -5315<br>
E-mail: <a href="mailto:sober@cua.edu">sober@cua.edu</a></i></font><br>
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