Page History
...
This page holds a few example code-snippets for use in pyana analysis. The analysis is written in python and uses MatPlotLib.PyPlot for plotting of data. Compare with myana user examples to see how (some of) the same things can be done using the myana analysis framework.
...
BeamLine Data: EBeam
To read out energy, charge and position of the beam from the beamline data, use getEBeam(). It returns a class/structure that has the following members/fields:
| Code Block | ||||
|---|---|---|---|---|
| ||||
def event(self,evt,env):
ebeam = evt.getEBeam()
try :
beamChrg = ebeam.fEbeamCharge
beamEnrg = ebeam.fEbeamL3Energy
beamPosX = ebeam.fEbeamLTUPosX
beamPosY = ebeam.fEbeamLTUPosY
beamAngX = ebeam.fEbeamLTUAngX
beamAngY = ebeam.fEbeamLTUAngY
beamPkCr = ebeam.fEbeamPkCurrBC2
print "ebeam: ", beamChrg, beamEnrg, beamPosX, beamPosY, beamAngX, beamAngY, beamPkCr
except:
print "No EBeam object found"
|
BeamLine Data: Fee Gas Detector
To read out the energy from the front end enclosure (FEE) gas detector, use getFeeGasDet(). This returns and array of 4 numbers:
| Code Block | ||||
|---|---|---|---|---|
| ||||
fee_energy_array = evt.getFeeGasDet()
gdENRC11 = fee_energy_array[0]
gdENRC12 = fee_energy_array[1]
gdENRC21 = fee_energy_array[2]
gdENRC22 = fee_energy_array[3]
energy = (gdENRC21 - gdENRC22) / 2
# or use the first two that has a different gain:
energy = (gdENRC11 - gdENRC12) / 2
|
BeamLine Data: Phase Cavity
To read out fit time and charge of the phase cavity, use getPhaseCavity() which returns a structure with the following fields:
| Code Block | ||||
|---|---|---|---|---|
| ||||
pc = evt.getPhaseCavity()
if pc try:
pcFitTime1 = pc.fFitTime1
pcFitTime2 = pc.fFitTime2
pcCharge1 = pc.fCharge1
pcCharge2 = pc.fCharge2
print "PhaseCavity: ", pcFitTime1, pcFitTime2, pcCharge1, pcCharge2
elseexcept :
print "No Phase Cavity object found"
|
...
Overview
Content Tools