I still don't have the delta-x numbers to correct the alignment.
3-layer XFT is gone, and that leaves our Level-1 rate too high.
I ran on min bias data from 177421, with initial luminosity of
1.2 E31. The results are essentially the same as before at 1.0 E31;
with the result that the overall rate w/o scintillator drops by a factor
of 6, the rate with front scintillator by a factor of 5, and the rate
with the rear scintillator by a factor of 4.
| 3-pair/12 | 3-pair/24 | inter/12 | inter/24 | single pair | |
| w/o scint | 0.0686767 | 0.07020176 | 0.0683185 | 0.0698264 | 0.41583 |
| front | 0.000259273 | 0.000259273 | 0.000255862 | 0.000255862 | 0.00128954 |
| rear | 0.00195137 | 0.00198549 | 0.0019309 | 0.00196502 | 0.00824216 |
In 176570, with 2.5E31, the results are
| 3-pair/12 | 3-pair/24 | inter/12 | inter/24 | single pair | |
| w/o scint | 0.108867 | 0.111114 | 0.107835 | 0.110109 | 0.728679 |
| front | 0.000543567 | 0.000543567 | 0.000534507 | 0.000534507 | 0.00245511 |
| rear | 0.00328858 | 0.003352 | 0.00322516 | 0.00329764 | 0.0135801 |
In 190856, with 4.1E31, the results are
| 3-pair/12 | 3-pair/24 | inter/12 | inter/24 | single pair | |
| w/o scint | 0.155139 | 0.158272 | 0.153396 | 0.156583 | 1.07845 |
| front | 0.000463102 | 0.000463102 | 0.000463102 | 0.000463102 | 0.00291482 |
| rear | 0.00114413 | 0.00117137 | 0.00114413 | 0.00117137 | 0.00689204 |
I have rate plots as a function of luminosity. I need more entries, especially at high luminosity.
Bob showed plots showing a drop in scintillator efficiency. This is most pronounced in the rear scintillator. There's no noticeable efficiency loss in the toroid scintillators.
We discussed the efficiency of finding Z information, and agreed that it would be good to find out how efficient this is and make it better if possible. pdf
Modified 12-June-2006 at 14:34
http://hep.physics.wisc.edu/~jnb/imu/12Jun2006