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<pre>L2CAL upgrade project sign-off review done this afternoon ... another major L2 trigger milestone has reached. Ted for everyone.</pre>


<!-- Date: Tue Aug 14 14:55:09 2007 -->
<pre>Folks: 
 
End of last Dec, I bought a bottle of Chimay belgian beer for Vadim and his L2CAL team and I left the bottle in the B0 teststand room. Ever since then, the L2CAL upgrade project has been under the beer pressure... to find out how much beer pressure it took to get the project to this point (upgrade sign-off this afternoon), please join us at User Center at 5pm today. we will open and finish this bottle of beer properly, and any other bottles you may find at user center as well. 
 
In addition, Daniel Whiteson and Cheng-Ju Lin (and Vadim too!), our first generation Pulsar postdocs, all have done a wonderful job for L2 upgrade, are heading off to new jobs. so this is the farewell party for them as well. 
 
come in L2 thirsty state. 
 
cheers, 
</pre>
<!-- Author: Ted -->


<!-- Date: Thu Aug 16 08:45:29 2007 -->
<pre> 
----- Original Message ----- 
From: Brian Winer &lt;winer@pacific.mps.ohio-state.edu&gt; 
Date: Thursday, August 16, 2007 8:21 am 
Subject: L2CAL Sign off 
To: pjw@fnal.gov, schlabach@fnal.gov 
Cc: Carla Pilcher &lt;carla@hep.uchicago.edu&gt;, Jonathan Lewis &lt;jdl@fnal.gov&gt;, Cheng-Ju Stephen Lin &lt;cjl@fnal.gov&gt;, Tiehui Ted Liu &lt;thliu@fnal.gov&gt;, Brian Winer &lt;Winer@mps.ohio-state.edu&gt;, Thomas Wright &lt;trwright@umich.edu&gt;, convery@fnal.gov, roser@fnal.gov, konigsberg@fnal.gov, cdf-l2@fnal.gov 
 
  Dear Peter and Phil, 
 
 
      The L2 Upgrade Committee reviewed the L2 CAL upgrade project on June 19th. At that initial review, we identified a number of issues that we felt needed to be addressed, such as error rates, algorithm performance, trigger rates, and TRIGMon. Since that review, progress on the project has been described at Friday Trigger Hardware and TDWG meetings. Finally, the committee heard a series of presentations on Tuesday August 14th. The committee believes the system is ready for operation as the default CDF L2 calorimeter trigger system without the need to keep the DCAS system as a backup. The proponents have addressed the issues that we identified from our initial review. Only a short list of action items remain. These include: 
 
      1) Checking documentation to ensure that the L2 algorithms described in the CDF Notes reflect the actual code being used. 
 
      2) Updating CDF 4152 to reflect changes in the TL2D bank and incrementing the version number. 
 
      3) Checking that the accessors for the TL2D bank are updated for the new bank structure so that user code can access the new L2 CAL trigger information. 
 
      4) Building a new version of TRIGMon to include all the monitoring code. 
 
      5) Two small algorithmic changes that should be coordinated with the TDWG. 
            - Ensure that Pass 14 clustering does not cross the 
              central plug boundary. 
            - Eliminate the "Ring of Fire" from the L2 clustering. 
 
      6) Maintain the infrastructure and retain the expertise to debug Pulsar boards/ mezzanine cards till the end of Run II. 
 
    In order to reap the rewards of this upgrade, additional work by the Trigger and Datasets Working Group is required. For example, because of the new clustering algorithm, trigger thresholds will need to be adjusted (a 15 GeV DCAS jet is not the same as a 15 GeV L2CAL jet).  In addition, algorithm choices, such as cone size, Had/EM cuts, etc., should be optimized and rationalized. We urge the TDWG to begin working on these issues as soon as possible. Physics groups should be encouraged to participate in this process and consider how the added flexibility can help their analyses. 
 
    Finally, we want to congratulate all the people that worked to develop this system in such a short time. They have created a trigger system that is both robust and flexible and will serve CDF extremely well through the end of Run II. 
 
 
           Brian Winer, 
           For the L2 Upgrade Review Committee 
</pre>
<!-- Author: Ted for everyone -->