<!-- Title: 16:54:39  Mon Apr 24 2006 -->
<!-- Crewchief: Willis+Pat -->
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<pre>Week of 24 April 2006</pre>


<!-- Date: Mon Apr 24 17:13:43 2006 -->
<p>We are in week 9 of the shutdown. The schedule for this week is 
<a href="http://ncdf67.fnal.gov/~tesarek/shutdown06/week09.html"> 
here.</a> The end plugs were "soft closed" today, and they will 
be bolted onto the detector after the COT and SVX groups do their 
checkout and give the go ahead. 
</p> 
<p>The new version of the online web server is now running on its own. The directory structure has been modified, so external links 
to www-cdfonline.fnal.gov may need to be modified. There will 
 also 
be some other "issues" as unexpected problems in the new web 
server are uncovered. 
</p>
<!-- Author: Willis+Pat -->


<!-- Date: Wed Apr 26 17:26:56 2006 -->
<p>The east and west end plugs have been bolted down ("hard 
   closed") today, and the momkey bars at the top of east 
   side have been installed for solenoid work. All 12 of 12 
   plug CAEN HV crates are back from maintenance, and are 
   all functional and the last 8 of them will be reinstalled 
   over the 
   next few days. New east side CLC PMTs have been installed 
   and are being tested. 
</p>
<!-- Author: Willis+Pat -->


<!-- Date: Fri Apr 28 16:33:59 2006 -->
<p>The plug CAEN SY527 HV mainframes have been installed. The "invar" rods, 
   which at one time, held up the low beta quads in the CDF collision 
   hall have been removed by the AD. The CDF low beta quads are now held 
   up by columns from the floor, and the invar bars support none of the 
   weight. When the NW toroid Hilman roller was <a href= 
'/cgi/elog/det-system-elog.pl?nb=operations&action=view&page=89&frame=2&anchor=16:25:47'>replaced,</a> 
   a flaw in the IMU toroid moving procedure allowed the NE toroid to 
   run into the invar bar. The invar bar, while not supporting any weight, 
   was still in contact with the quad support, and it appears the quads 
   possibly moved by 0.25". The AD was notfied as soon as this was 
   discovered (21Apr06), appropriate action was taken, and the assessement then was that there appeared 
   to be no damage to the quad bellows. The flaw in the procedure has been 
   rectified, and the removal of the invar bars removes the mechanical 
   interference. 
</p> 
<p>Summary of the 28 April 2006 9AM AD Shutdown Meeting 
<ul> 
<li>The AD shutdown work is on schedule. The 01May06, 0700-0730 site 
    wide power outage to put back the master substation is to proceed 
    as scheduled.</li> 
<li>D0 is right on schedule: The SVX4 chips in L0 have been biased and 
    checked out. The flange and spool pieces have been welded to their 
    beam pipe, but not yet hooked up to the TeV. They are proceeding 
    with the silicon H-disk installation.</li> 
<li>Tevatron.  The Kautzky valve poppet replacement is about 80% 
    done. TEL1 is back in the TeV, and its reinstallation is proceeding. 
    Our new 1.5m collimator at A48 is being baked out, and is scheduled 
    to be aligned in next week. A3 conning tower work is being done. 
    The CDF low beta quads will be repositioned during the week of 
    01May06 -- the details of what quads get moved were settled on 
    25Apr06. The summary is: the beam will be moved vertically down by 
    1 mm and horizontally by 0.9 mm; the beam trajectories are closer 
    to what we want, but the corrector elements now have lots of leeway 
    for adjustment.</li> 
</ul> 
</p>  
<!-- Author: Willis+Pat -->


<!-- Date: Fri Apr 28 16:41:06 2006 -->
<table><tr><td><a href=/cgi/elog/det-system-elog.pl?nb=operations&action=view&page=-47&button=yes target='xxx' onclick='jswindow()'; align=top><img src=/cgi/elog/det-system-elog.pl?nb=operations&action=view&page=-48  width='300' align='top'></a></td><td>The interference between the legacy invar rod and the NW IMU steel shielding "fin". 
This pic is courtesy of Jim Volk.</td></tr></table>
<!-- Author: Willis -->