...
Analysis: A look at the deposited-energy distributionsmeasured in the different CAL layers (Benoit): a factor close to 90%, dependent on the layer and the bombarding energy has to be applied to the data to get a good match with the data. It is not clear if this effect is only due to non-linearity in the extrapolation of the cosmic-muon calibration to the highest energy range. Philippe showed the dependence of the measured energy on the distance to the log edge. David P. has studied the beam width, found much narrower in the data tahn in the existing simulation runs. jan and Niklas showed results on the FHE efficiency studied at 200 GeV. Since the deposited energy per layer is so high, there are only few events below threshold. The measurement has to be repeated at lower energy.
September 8
Status: Smooth operation most of the time. Program of different geometrical configurations completed at 280 GeV. FHE tests completed at 280 GeV (theshold=0.5 GeV-2 GeV) at 2 different positions. Cerenkov counters have been checked (there was connection problems), and are now working, although the efficiency is low.
...
Communications | - Magnet failure: MNP17 colling system failure at 1AM stopped data taking for several hours but no damage on hardware. Physics restarted after 2 hours w/o silicon tagger for CAL calibrations. Magnet repaired in the morning | |
Online Report | - DAQ sync studies going on | |
Offline Report | Francesco: | |
Program | - Complete DAQ sync studies | |
Notes | - Fill elogbook | ]]></ac:plain-text-body></ac:structured-macro> |