<!-- Title: 07:10:18  Tue Mar 15 2005 -->
<!-- Crewchief: rr -->
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Week of March 14th    


<!-- Date: Tue Mar 15 07:14:40 2005 -->
Monday Status 
 
Store was dropped at 6am Monday Morning.  The plan was to turn it around right away though wet engine work delayed it a little.  Shot went in with a few minor hiccups but a lum of 106e30.  Lifetime seemed down.  CDF started running well w/o silicon.  Beam conditions looked fine.  About 90 min into the store, silicon was turned on and included in the readout.  The plan was to run with silicon as the default from here on out.   
 
Pulsar found a problem with SVT trigger.  This problem was NOT pulsar related but rather caught by the pulsar (and not by the alpha).  Silicon was taken out of the readout while the SVT gang trouble shot the problem.  
<!-- Author: rr -->


<!-- Date: Tue Mar 15 07:15:44 2005 -->
General plan is to keep the store in until mid to late morning and then go into shot setup. 
 
  
<!-- Author: rr -->


<!-- Date: Wed Mar 16 18:58:57 2005 -->
<pre>Wednesday Status 
 
Ran reasonably well overnight.  We are currently at 80% efficiency for the store.  Had one silicon ladder that was tripping ~ once every 1.5 hours for a while and then settled down.  On one instance we mishandled the power supply gui and turned off the bulkhead which caused about 40 min of downtime.  Otherwise, relatively smooth running. 
 
Currently, performing a VRB test to see whether we can get this new firmware to work properly.  Once that is done, we will spend the last 1.5 hours of the store with the pulsar driving.  If that goes well, the pulsar will drive the entire next store -- the last test on our list. 
 
Tonight there will be a one hour access for D0.  We will go in and do some silicon maintenance, CMX miniskirt hv work to try to better isolate a set of chambers to see which one is at fault, and installing a new CCU for the NW BSU counters (hows that for acronyms...).  We will not be opening any steel tonight.   Shot setup will immediately follow. 
 
8-10 hours into the next store, Ron Moore will adjust the collimators and separator voltage to try to manipulate the helix to get more spacing between p and pbar beams.  When they did this as a test last summer, the store lifetime dramatically increased.  However, later it was implemented and we did not see such a gain.  Here we go -- trying it again.  We will bring the experiment to stand by for the manipulations and then resume data taking 
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<!-- Author: rr -->


<!-- Date: Thu Mar 17 19:04:43 2005 -->
<pre>D0 On-line Luminosity 
 
D0 will be installing new luminosity counter electronics tomorrow.  The hope is that this new electronics will properly take into account dead time from in time beam halo that was going undetected previously.  The expectation is that the D0 lum will increase some 10-12% at high lum.  They also have a correction for magnet to implement that is 3%.  With those changes, we should be comparable again!!!  D0 will eventually update its old numbers and the TeVatron guys will be able to get additional credit for both delivered lum and instantaneous luminosity... 
 
For those that want the full detaila, check out the following link... 
&lt;a href=  
'/cgi/elog/det-system-elog.pl?nb=2001&action=view&page=27&frame=2&anchor=09:11:33'&gt;  
 http://www-bd.fnal.gov/SDA_Viewer/VaiaLuminosity/brendan-ADD0CDF-022305.pdf&lt;/a&gt;. 
 
 
 
 
</pre>
<!-- Author: RR -->


<!-- Date: Thu Mar 17 19:06:27 2005 -->
Try again .... 
 
<a href=  
'/cgi/elog/det-system-elog.pl?nb=2001&action=view&page=27&frame=2&anchor=09:11:33'> 
http://www-bd.fnal.gov/SDA_Viewer/VaiaLuminosity/brendan-ADD0CDF-022305.pdf </a>. 
  
<!-- Author: rr -->


<!-- Date: Thu Mar 17 19:13:01 2005 -->
<pre>Access yesterday was successful.  Muon work was done, we swapped a power supply because one of its fans had died and we did some silicon work.   
 
The store went in at 107e30.  We started up quite well.  We did have a problem with L3 circuit breaker but that was resolved efficiently.  We have taken data relatively smoothly all day.  The numbers say we are only 70% efficient but we had to turn 
off twice today for AD -- they have increased separators to change the helix to see whether it improved the beam lifetime.  They opened collimators prior to doing this.  They then went back to prior settings and collimator positions as a sanity check to make a second measurement.  The delta time between measurements was 4 hours.  We ran smoothly but during moving conditions, we went to stand-by 
 
Plan will be to drop this store tomorrow mid day or so.  We will ask for an access to repair a silicon SVT wedge that is now inefficient. 
 
Pulsar tests at the end of this store now which is just a sanity check and then they will drive the entire next store with silicon in.  We will make no DAQ changes in between. 
 
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<!-- Author: rr -->


<!-- Date: Fri Mar 18 09:01:08 2005 -->
<pre>Friday Status 
 
We ended this store at 9am with a store efficiency of 75%.  There were 3 reasons for the lower number -- there were several scrapes by AD for tests that they wanted to perform midway through the store in which we had to turn off.  There was an RF problem on the owl shift which filled the abort gap for a bit and we turned off.  We had a problem with the RT server that took a while to resolve and a silicon trip that took a while to get back on. 
 
It sounds bad but we actually ran quite smoothly with only a few interruptions. 
 
We have an access at 9am to fix this SVT inefficiency.  I will go in and look at this water leak from the low beta quads on the west side -- and then we will go right into shot setup. 
 
Pulsar guys drove for the last two hours of this store and that went fine.  We will START the store with ALL CDF and pulsar driving and run the pulsar the entire duration.</pre>
<!-- Author: rrr -->


<!-- Date: Fri Mar 18 19:25:21 2005 -->
<pre>And the agony continues 
 
Not only do my picks suck for the NCAA basketball tournament -- we had a kicker prefire this afternoon!  Shot went in with a record lum of 122e30.  We had trouble turning on because of DAQ/RT Server problems.  35 min later, we started running withthe pulsar driving.  We ran quite well for about 90 min and then the kicker prefire.  It was our good friend AAK1. 
 
WE took in excess of 150 rad and pulled the abort. 
 
WE have been in on access for the past few hours checking things out.  We are taking this opportunity to swap a crates worth of TDC's as well. 
 
AD has decided to swap out this thyratron.  They will begin at 8pm.  I believe its an 8 hour job and then 8-10 hours of conditioning with no beam.  No collisions for about 20 hours! 
 
Silicon checkout still in progress -- too early for a real damage report! 
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<!-- Author: rr -->


<!-- Date: Sat Mar 19 17:52:24 2005 -->
<pre>Saturday 
 
We are waiting.  The kicker AAk1 thyratron has been replaced.  It was fired repeatedly for 8 hours.  It is now in an 8 hour mode where it has been fully charged to 38kv.  PAK3 is also being reconditioned for good measure.... 
 
So far, no accidental prefires since the tube was replaced. 
 
If all goes well, studies will terminate at 8pm this evening, shot setup to start around 9pm.  They have ~280ma of pbars.  Not sure how agressive they will be.   
 
Our silicon will remain off for most of this store as we see how things look.  If conditions permit, we will probably turn it on for an hour or so tomorrow to complete final checkout and determine what if any additional access is needed to continue to operate.</pre>
<!-- Author: rr -->


<!-- Date: Sun Mar 20 21:05:44 2005 -->
<pre>Sunday 
 
No comment on NCAA Basketball except there is a reason you don't see me on ESPN's "Dream Job Challenge"... 
 
Store went in at 3am this morning with an inital lum of 106e30. We came up WITHOUT silicon and have been running most of the store that way.  We are about 90% efficient for the store at the time of my writing this.  I expect the silicon will go in on this store for a 1-2 hour test to make sure all systems are go.  Not clear when we will put the silicon back in for normal DAQ -- I think I want to see a second store end well before we begin to operate it as before.  I have not spoken at length to Marcel and Rong about this. 
 
 
Plan is to keep this store in till tomorrow morning 
 
 
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<!-- Author: rr -->


<!-- Date: Sun Mar 20 21:08:17 2005 -->
MARCH 21st ALL Experimenters Meeting -- Our silicon group (led by Rong and Marcel) will give a special talk at the All Experimenters Meeting.  Their talk will be a silicon damage report and where our systems stand after this latest bout of kicker prefires.  PLEASE ATTEND  
<!-- Author: rr -->