(Calorimeter
example)
C18 - CAL Pedestals - Low Level Calibration
Description :
Pedestals correspond to an ADC output for zero input to front-end electronics
(FEE). There is a pedestal value
per gain (energy) range of each diode. Each pedestal is characterized by a
centroid and a width of a distribution of a given (TBD) number of triggers.
Since there are two diodes in each of the two crystal faces, we will have eight
pedestal distributions per crystal. . In practice, pedestal values are defined
as pedestal subtracted ADC values. In the SAS reconstruction software they are
usually referred to as rails (TBR). Typical numbers are expected to be
the order of 3000 while the width corresponds to the sigma of a Gaussian
distribution fitted to the pedestals of a large number of events for each range
of the diode. Typically, one expects width values to be much smaller than
pedestals.
|
|
Tower |
Column |
Layer |
Face |
Diode |
ADC
value |
|
|
|
|
|
|
|
|
Ped |
Width |
|
|
0 |
0-11 |
0-7 |
0-1 |
0-1 |
0-4096 |
0-4096 |
|
Type |
int |
int |
Int |
int |
Int |
float |
float |