(updated) "localmon" summary of dAuTOF running....

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From: W.J. Llope (llope_at_physics.rice.edu)
Date: Wed Mar 12 2003 - 11:44:57 EST

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hi all, the dAuTOF trigger running appears to be complete now.
here's some summary information for the dAuTOF data based on
the localmon data....

from concatenation of LM files including localmon_to40XXXXX.dat
where XXXXX = 68011, 68015, 68017, 68018, 68019, 68020, 68033,
68038, 69039, 69025, 69033, 69049, 70011
(N.B. does not include test run: 66046)

--> 196896 beam events out of 255628 >>--> ratio = 0.770
   --> ~2M pVPD physics events
   --> ~2.5M STAR events
   --> local trigger efficiency ~77%

--> Integrated counts of stop-side hits:
-> TOFp: 630k (~0.32 TOFp hits per pVPD phys event)
-> TOFr: 2.4M (~1.22 TOFr hits per pVPD phys event)

--> hit patterns normal
--> No. TOFp hits/slat range from ~15k to ~25k over 32 slats
--> No. TOFr hits/cell range from ~25k to ~45k over 69 cells

--> start resolution
   --> single detector resolution improved by ~10% (note dAuTOF
   trigger includes a loose pVPD-based Zvtx cut). this improvement
   supports my previous assertion that the pVPD start resn will
   improve once the calibrations are performed using the production
   data and simple Zvtx cuts there...
        now:
        sigma's of 1-<2> in these data: 2.55ch, 2.43ch, & 2.47ch

equiv single detector resn's: 104ps, 100ps, & 101ps

hence sigma(<3>) ~ 59ps and sigma(<4>) ~ 51ps

the rest below is the details on the localmon files and the individual
runs from the shift log...
regards,
bill

---------------------------------------------------------------------------

  size localmon file name Np Nl LTE
  (kB)
  ----- ---------------------- ----- ----- -----
   6208 localmon_to4066046.dat 4135 4942 0.837 (test run)
  11216 localmon_to4068010.dat 3061 9082 0.337 (mostly dAucombined)
   1876 localmon_to4068011.dat 1218 1494 0.815
   4848 localmon_to4068013.dat 2636 3885 0.679
   7652 localmon_to4068015.dat 4466 6126 0.729
   4024 localmon_to4068017.dat 2306 3222 0.716
    412 localmon_to4068018.dat 226 326 0.693
   4592 localmon_to4068019.dat 2608 3683 0.708
   2292 localmon_to4068020.dat 1398 1835 0.762
   7628 localmon_to4068025.dat 1556 6197 0.251 (mostly UPCcombined)
  42408 localmon_to4068033.dat 28019 33807 0.828
  39496 localmon_to4068038.dat 25133 31553 0.797
  12704 localmon_to4068039.dat 7985 10161 0.786
133484 localmon_to4069025.dat 78982 106838 0.739
  31620 localmon_to4069033.dat 20035 25257 0.793
   3204 localmon_to4069049.dat 1916 2554 0.750
  31216 localmon_to4070011.dat 19977 24887 0.803

---------------------------------------------------------------------------

from shift log for period including all dAuTOF running:

W.J. Llope, Ph.D. Res. Assoc. Professor T.W. Bonner Nuclear Laboratory phone: 713-348-4741 Rice University, MS-315 fax: 713-348-5215 6100 S. Main St. Houston, TX 77005-1892 e-mail: llope_at_physics.rice.edu WWW home: http://wjllope.rice.edu/default.html

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