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<p>Thanks Jim.</p>
<p>Part of the need for the polarity check is to establish the
"parity" of the skews (which differs between EPICS and codes). I
don't want to introduce bias, but if we could measure the poletip
field (with sign) of each quad and log it, we'll save time
overall. I'll sketch up a procedure.</p>
<p>Thanks</p>
<p>D<br>
<br>
</p>
<br>
<div class="moz-cite-prefix">On 7/5/2016 11:00 AM, Jim Coleman
wrote:<br>
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<div class="moz-cite-prefix">Hi Dave,<br>
We haven't powered any of the 4F quads yet. That will not
happen until the spool pieces are installed due to splitting of
the magnet. We have to perform a voltage/ current/ polarity
measurement of any magnet as part of the HCO. I'll make sure
LCW gets put on the skews.<br>
-Jim<br>
<br>
On 7/5/2016 10:08 AM, David Douglas wrote:<br>
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<p>re: #2) - please put the results of the test into the
LERFLog. Thanks</p>
<p>D<br>
</p>
<br>
<div class="moz-cite-prefix">On 7/5/2016 10:07 AM, David Douglas
wrote:<br>
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<p>Hi Jim - don't know if the following was communicated to
you or not, but</p>
<p>1) Steve asked if the 10 additional skew quads needed water
cooling. Answer: if the other quads are run with water
cooling, these will need it as well. They run at the same
fields as the normal quads.</p>
<p>2) Has each quad been polarity checked (i.e. a Hall probe
put on each pole of each quad)? We need to be sure there are
consistent sign conventions through 4F, and I'll need to
know what pole of each quad is at what sign and field level
when the usual +5A test current is being run.</p>
<p>Thanks,<br>
DD</p>
<p><br>
</p>
<div class="moz-cite-prefix">On 6/30/2016 4:32 PM, Jim Coleman
wrote:<br>
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<blockquote
cite="mid:8daf15ae-9173-d459-1628-4a8427a82d32@jlab.org"
type="cite">apologies for sending it out late <br>
<br>
<br>
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