Hi,
I have commited to BRAT CVS new versions of
BrZdcRdo and BrZdcRdoModule classes and
added ZDC calibration parameters class
BrCalibrationParamsZDC in /brat/data/calib.
Since I changed the methods names in BrZdcRdo
(sorry for this inconvenience, this is the last change
of names in ZDC) I did change the methods giving
the time from ZDCs in BrVertexModule.cxx file.
The new ZDC RDO module has now the data from
"low-gain" ADC. The BrZdcRdoModule can return
both digitized and calibrated data (as previous one),
but some methods names have been changed. All the
methods are listed below:
// digitized data from "high-gain" ADC
GetLeftAdc1 ()
GetLeftAdc2 ()
GetLeftAdc3 ()
GetLeftAdcSum ()
GetRightAdc1 ()
GetRightAdc2 ()
GetRightAdc3 ()
GetRightAdcSum ()
// digitized data from "low-gain" ADC
GetLeftAdc1Lo ()
GetLeftAdc2Lo ()
GetLeftAdc3Lo ()
GetLeftAdcSumLo ()
GetRightAdc1Lo ()
GetRightAdc2Lo ()
GetRightAdc3Lo ()
GetRightAdcSumLo ()
// digitized times
GetLeftTdc1 ()
GetLeftTdc2 ()
GetLeftTdc3 ()
GetLeftTdcSum ()
GetRightTdc1 ()
GetRightTdc2 ()
GetRightTdc3 ()
GetRightTdcSum ()
// energy in ZDCs ("high-gain" spectrum)
GetLeftEnergy ()
GetRightEnergy ()
// energy in ZDCs ("low-gain" spectrum)
GetLeftEnergyLo ()
GetRightEnergyLo ()
// times from ZDC
GetLeftTime1 ()
GetLeftTime2 ()
GetLeftTime3 ()
GetLeftTime ()
GetRightTime1 ()
GetRightTime2 ()
GetRightTime3 ()
GetRightTime ()
// z-vertex
GetZ ();
At the moment BrZdcRdoModule uses hardcoded calibration
parameters which were taken from 65 GeV data. This should not
affect timing (and z-vertex) calculations. However the absolute
z-position changed since ZDC cables (from IR to FEH) were changed, so
we need to re-adjust the constant offset term by comparison with TPM1.
I'm having troubles with getting ZDC pedestals from new runs and
also left ZDC detector had (still have?) problem with linear FIFO
module which does an analog sum, and connection to the PMT for
that ZDC was misplaced, what slows down the energy calibration
on new data.
The functions GetLeftTime () and GeRightTime () calculate the
average time over three (when it is possible) ZDC modules, and
therefore preferred for getting times from ZDC. They are also used
for z-vertex calculation.
When I'll succeed with getting pedestals and will have more
data from left ZDC (which now is connected properly) I'll do new
calibration and Michael will put new numbers in a database.
Andrei Makeev.
This archive was generated by hypermail 2b30 : Fri Aug 03 2001 - 19:29:29 EDT