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Efficiencies for the different sectors

The lvl1 trigger has 32 sectors, which are more ore less located on in a cirkel around the beam. On this page the efficiencies of the different trigger sectors are shown. The table shows the efficiencies for all sectors. The efficiency is highest for sectors 7, 8, 23 and 24. These are the sectors on top and bottom of ATLAS. For these sectors the efficiency is plotted against the trackparameters.

We can demand that the cosmic is detected by 2 sectors b.e 7 & 23 or that more then 1 sector may detect it 7 or 23. The efficiencies for these cases are also shown.

New files with 64 sectors.

In real life there are 32 sectors in the front and back of ATLAS, 64 in total. Measurements were done with cosmic rays during which only sector 39 was active. The distributions of the truth parameters and the efficiency vs these parameters are plotted in the files:

  • truth_distr_muVol_sec39.gif
  • truth_distr_sctVol_sec39.gif
  • truth_distr_trtVol_sec39.gif
  • eff_muVol_sec39.gif
  • eff_sctVol_sec39.gif
  • eff_trtVol_sec39.gif

the data for these plots was taken from:

  • muVol_noField.aan.root
  • sctVol_noField.aan.root
  • trtVol_noField.aan.root

which were made on 30-06-07 and 01-07-07

I have obtained the following values for the efficiency of sector 39:

VOL tot number of evnts number of evts in 39 eff
Mu 18436 1172 0.064
SCT 1910 285 0.149
TRT 1846 251 0.136

The efficiencies for all the sectors for the new MU file are given in the table sec_eff_trig.txt!!! More comment will follow.

-- MathieuBlom - 27 Jun 2007

Attachments Attachments
Topic attachments
I Attachment History Action Size Date Who Comment
GIFgif eff_muVol_sec39.gif r1 manage 39.7 K 2007-07-02 - 17:43 MathieuBlom plot of the efficiency vs the true track parameters for sector 39 for the muon volume.
Texttxt eff_multiple_sec.txt r2 r1 manage 0.3 K 2007-06-29 - 16:47 MathieuBlom this file contains a table of the efficiency if several sectors work together
GIFgif eff_sctVol_sec39.gif r1 manage 38.2 K 2007-07-02 - 17:44 MathieuBlom plot of the efficiency vs the true track parameters for sector 39 for the SCT volume.
GIFgif eff_sec_23.gif r4 r3 r2 r1 manage 37.2 K 2007-06-29 - 16:50 MathieuBlom this file contains plots of the efficiency against the true track parameters for sector 23
GIFgif eff_sec_24.gif r3 r2 r1 manage 36.7 K 2007-06-29 - 16:50 MathieuBlom this file contains plots of the efficiency against the true track parameters for sector 24
GIFgif eff_sec_7.gif r4 r3 r2 r1 manage 36.4 K 2007-06-29 - 16:48 MathieuBlom this file contains plots of the efficiency against the true track parameters for sector 7
GIFgif eff_sec_8.gif r3 r2 r1 manage 34.8 K 2007-06-29 - 16:50 MathieuBlom this file contains plots of the efficiency against the true track parameters for sector 8
GIFgif eff_trtVol_sec39.gif r1 manage 38.7 K 2007-07-02 - 17:44 MathieuBlom plot of the efficiency vs the true track parameters for sector 39 for the TRT volume.
Texttxt sec_eff.txt r2 r1 manage 0.5 K 2007-06-29 - 16:47 MathieuBlom this file contains a table with the efficiencies of all the sectors
Texttxt sec_eff_trig.txt r1 manage 0.9 K 2007-07-19 - 13:31 MathieuBlom table of the efficiencies of the different sectors for the new MU file
GIFgif truth_distr_muVol_sec39.gif r1 manage 33.2 K 2007-07-02 - 17:45 MathieuBlom distribution of the true track parameters for sec 39 for the muon volume.
GIFgif truth_distr_sctVol_sec39.gif r1 manage 32.1 K 2007-07-02 - 17:46 MathieuBlom distribution of the true track parameters for sec 39 for the SCT volume.
GIFgif truth_distr_trtVol_sec39.gif r1 manage 33.1 K 2007-07-02 - 17:46 MathieuBlom distribution of the true track parameters for sec 39 for the TRT volume.
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Topic revision: r8 - 2007-07-19 - MathieuBlom
 
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