HCal Electronics Intercalibration
Constants of the electronics intercalibration have units [ADUc/ADUp], where ADUc and ADUp are ADC units in calibration and physics mode, respectively.
Storage / Availability
The constants are made available in the database in folder
Every entry gets tagged to allow permanent reference. Users are encouraged to use tags rather than the HEAD, i.e. make sure they know which assumptions are valid on the constants they use.
FNAL 2008 (May): Average intercalibration factors from runs 500044 to 500477 and 520072 to 520158. The same selection procedure was applied as for HcalInter-002. The intercalibration factors from the single measurements are available on the GRID (/grid/calice/ic_ahcal/)
2007: Average intercalibration factors from either CERN (all but 4 modules) or DESY measurements (modules 1, 2, 14 and 25) after selection procedure (described below)
Since the spread of the differences between single measurements and the average values for each channel appears to be much larger than the expected 1-2% a selection procedure is applied to reduce it. All measured values for each single channel are sorted by size. Starting in the middle and going up, the relative differences between subsequent values are checked. As soon as a jump of more than 1% is encountered, the remaining values in this direction are removed. Afterwards the same is done for the opposite direction, this time starting one value before the middle and going down. The remaining values are averaged. This reduces the spread mentioned above to the expected range.
2006: Average values over all inter measurements in longer periods