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How is it possible to run CEBAF when 1/4 cryomodule cavity 7 is *wrong*
by 12 degrees!!! Or how about on October 9 when cavity 7 was wrong by
37 degrees? Attached spread sheet shows tweak-summary of chopper gang,
buncher, capture, quarter cavity 7, quarter cavity 8 following each
bunchlength measurement since August 9. Big offenders - quarter
phases. Some days, relatively big changes to capture. It used to be
we never expected to move things by more than a degree or so, right? I
remember adjusting phases in increments < 1 degree to get nice yao
cavity pattern. Helpful? Tell me and I'll butt out. <br>
Matt<br>
<img src="cid:part1.07040204.08080408@jlab.org" alt=""><br>
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<img src="cid:part2.08010804.09000207@jlab.org" alt=""><br>
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<img src="cid:part3.00090709.00080306@jlab.org" alt=""><br>
<pre class="moz-signature" cols="72">--
Matt Poelker
Jefferson Lab
MS Bldg 5A, Rm 500-17
12000 Jefferson Ave.,
Newport News, VA 23606
<a class="moz-txt-link-abbreviated" href="mailto:poelker@jlab.org">poelker@jlab.org</a>
757-269-7357 office
757-584-7357 pager
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