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Folder:   GENERAL
From:     alstone@d0alan2.dhcp.fnal.gov

Subject:  A Year and a Day in the Life of an Experiment
Date:     20-APR-2003 10:16
Expires:  20-MAY-2003 10:16


 Dear Colleagues:

 A year and a day ago, the CFT+PS became fully instrumented:

 See the post made by George Ginther to D0News:

 http://www-d0.fnal.gov/cgi-bin/d0news?read__GENERAL__11235

 A year and a day later, we had our best day of data taking (so far)
 in Run IIa:  94.0%.  Recorded/Delivered = 1181.78/1257.63 during 20.3
 hours of store.  The L1/L2/L3 rates from Store 2441 will give you a
 better perspective of our performance:

 http://www-d0.fnal.gov/runcoor/rate_plots/2400/store_2441.jpg

 Only 19 days into this month, and we have recorded more luminosity
 than in the entire months of April, May, June and July of 2002.

 In the past year plus day the Tevatron delivered 164.7 pb-1, we recorded 
 112.8 pb-1, and 108.3 pb-1 was with the complete detector in the readout.  
 The average (108.3/164.7) over that period is 65.7%.  However, over the 
 past month, our average is much higher ~85%. 

 I updated some plots.

 D0 Run II Luminosity Operations Summary Table (Oct 2000 - Present):

 http://www-d0online.fnal.gov/www/groups/lum/reports/RunII.html

 D0 Data Taking Monthly Summary (19 April 2002 - 19 April 2003):

 http://www-d0.fnal.gov/runcoor/RUN/save/2003-04-19_d0_monthly_data_taking_summary-01.jpg

 D0 Data Taking Monthly Efficiency (19 April 2002 - 19 April 2003):

 http://www-d0.fnal.gov/runcoor/RUN/save/2003-04-19_d0_monthly_data_taking_efficiency-01.jpg

 D0 Physics Data Taking w/Full Detector (19 April 2002 - 19 April 2003):

 http://www-d0.fnal.gov/runcoor/RUN/save/2003-04-19_physics_full_detector-01.jpg

 In the bar plot above, I determined the corrections to the normalizable
 recorded luminosity for two cases:
 a) Non-Physics Special Runs (to determine All Physics)
 b) Physics Runs without a complete detector (to determine Full Detector).

 D0 Integrated Luminosity (19 April 2002 - 19 April 2003):

 http://www-d0.fnal.gov/runcoor/RUN/save/2003-04-19_d0_integrated_luminosity-winter_conference-01.jpg

 On the integrated lumi plot, I use the corrected recorded Physics Luminosity
 with Full Detector. 

 Finally, all of the above pages can be found linked from the D0 Run IIa
 Operations web page, including updated plots as I make them:

 http://www-d0.fnal.gov/runcoor/

 Congratulations DZero!

 Alan

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