The calorimeter consists of 80 logs.
The CalHit class contains the information about a single calorimeter log. This includes the ADC values for all 4 digitizations, and implements a LogID member which provides access to information on the position of the log within the calorimeter.
A typical user will need getColumn and getLayer and getADCValue.
getColumn and getLayer are derived from logID, which comes from getSequence getPipeline and getXY.
A better documenation here is still needed. Any suggestions ?
CALHit | ||
Members | Range | Comment |
getADCID() |
0 to 3 |
Returns the remainder of the ADC sequence number divided by 4 for a particular log and energy range |
getADCPinID() |
0 or 1 |
Returns Pin Diode ID: 0 = Low Energy 1 = High Energy |
getADCRangeScale() | Returns Range: 0 = High gain 1 = Low Gain |
|
getADCValue() | 0 to 4095 | Returns the Pulse Height value for this log end in ADC counts. Conversion from ADC counts to Energy is done via calibration files. The arguments are actually left=0(-column) and right=1 (+column) and gain |
getLogID() | Returns a pointer to a LogID class (See below) |
Note: the underlined members are for experts only.
For the experts: getADCPin() and getADCRangeScale() are combined to produce
LEX4 - High Gain Low Energy (0,0)
LE - Low Gain Low Energy (0,1)
HEX8 - High Gain High Energy (1,0)
HE - Low Gain High Energy (1,1)
The LogID class contains a log ID number (encoding of detector element position) as well as functions to obtain the location of log in question. LogID is used in the CalHit class.
LOGId | ||
Members | Range | Comment |
getColumn() |
0 to 9 |
Returns the column number. There are 10 logs per layer,
each position comprises a 'column'. This value is calculated from the electronics
sequence and pipeline values. If getXY() returns X it means that the is log oriented along X, (see below). The Y coordinate of where the energy was deposited is measured by using the column number and the X coordinate is measured by using light assymetry. (Vice-versa for Y layers) |
getID() |
0 to 79 |
Returns Log ID's: This value encodes the position information of a log in the calorimeter. It should not be used to calculate the position information directly, instead use the functions getColumn(), getLayer(), and getXY(). |
getXY() | 0 or 1 | Returns whether the log is parallel to the X or Yaxis.
(X=0 , Y=1) (See description of getColumn() above for measuring X/Y position of energy deposits) |
getLayer() | 0 to 7 | Returns the layer this log is in. Layers are numbered from 0: ( closest to TKR) to 7: (furthest from TKR) Measure Z position in calorimeter using the layer value. |
getPipeline() | 0 to 7 | Returns the electronics pipeline the log is read out through |
getSequence() | 0 to 5 | Returns the electronics ADC sequence the log is read out from |
Note: the underlined members are for experts only.