In This Package:

GunMuon.py

Go to the documentation of this file.

#!/usr/bin/env python

class GunMuon:
    '''
       configure Muon generator
    '''

    def __init__(self,
                 stage='null',
                 name='Muon',
                 volume='/dd/Structure/Pool/db-ows',
                 start_time=0,
                 seed=1234567):

        # set up Gnrtr itself
        from Gnrtr.GnrtrConf import Gnrtr
        gnrtr = Gnrtr(name);

        gnrtr.GenTools = [ "GtGunGenTool/"+name+"GunGen",
                           "GtPositionerTool/"+name+"Pos",
                           "GtTimeratorTool/"+name+"Tim",
                           "GtTransformTool/"+name+"Tra",
                           "MuonProphet/"+name+"Prophet"
                           ]

        gnrtr.ThisStageName = "Kinematic"
        gnrtr.TimeStamp = start_time

        if stage != 'null':
            stage.KinematicSequence.Members.append(gnrtr)

        # set up each tools
        from GaudiKernel import SystemOfUnits as units
        from GenTools.GenToolsConf import GtGunGenTool,GtPositionerTool, GtTransformTool, GtTimeratorTool, GtHepEvtGenTool
        from MuonProphet.MuonProphetConf import MuonProphet
        # Set up Gen
        gun = GtGunGenTool(name+"GunGen",
                           ParticlesPerEvent = 1,
                           ParticleName = "mu+",
                           Momentum = 5*units.GeV,
                           MomentumMode = "Fixed",
                           MomentumSpread = 4*units.MeV,
                           DirectionMode = "Fixed",
                           Direction = [ 0, 0, -1 ],
                           DirectionSpread = 3)
        
        # Set up positioner
        pos=GtPositionerTool(name+'Pos',Volume=volume)
        # I should use relateiv
        #pos.Mode = "Relative"
        pos.Mode = "Fixed"
        pos.Position = [1*units.meter,
                        1*units.meter
                        ,10*units.meter]
        
        # Set up timerator
        tim=GtTimeratorTool(name+'Tim')
        tim.LifeTime = 0.001123*units.s
        
        # transform
        tra=GtTransformTool(name+'Tra',Volume=volume)
        tra.Offset = [0., 0., (0.042)*units.meter]

        ## More surprise from muon starts from here.
        # muon prophet
        prophet=MuonProphet();
        #prophet.Active=False;        
        prophet.Site = "DayaBay"
        prophet.GenTools     = [ "Li9He8Decayerator/Li9He8" ]
        prophet.GenYields    = [ 0.5*units.cm2/units.gram ]
        prophet.GenYieldMeasuredAt = [260*units.GeV]
        prophet.GenLifetimes = [ 0.002*units.s ]

        # trigger related configuration
        prophet.TrkLengthInWaterThres = 20*units.cm
        prophet.WaterPoolTriggerEff = 0.9999

        prophet.OutputLevel=2

        # Set false, otherwise all times will be reset so the signal vertex is at t=0.
        from G4DataHelpers.G4DataHelpersConf import HepMCtoG4
        convertor = HepMCtoG4()
        convertor.ZeroTime = False


        pass

if __name__ == "__main__":
    obj=GunMuon()

---