Histogrammer Class Reference

Inheritance diagram for Histogrammer:

Public Member Functions
def	event (self)
def	terminate (self)

Static Public Attributes
list	hist
	2D histograms
int	pixelID = 482
	pixel ID
TH2F	propTime
	histogram

Detailed Description

 A module to histogram pixel hits from individual fibers

Definition at line 29 of file laserPixelIlumination.py.

Member Function Documentation

event()

def event

(

self

)

 Event processor: fill histograms 

Definition at line 44 of file laserPixelIlumination.py.

    def event(self):
        ''' Event processor: fill histograms '''
 
        digits = Belle2.PyStoreArray('TOPDigits')
        for digit in digits:
            simhits = digit.getRelationsWith('TOPSimHits')  # several simhits can contribute
            for simhit in simhits:
                photon = simhit.getRelated('TOPSimPhotons')  # one or none possible
                if photon:
                    k = int((photon.getEmissionPoint().X() + 22.5) / 5.5)
                    if k >= 0 and k < 9:
                        self.hist[k].Fill(digit.getPixelCol(), digit.getPixelRow())
                    else:
                        b2.B2ERROR('wrong decoding of fiber number: ' + str(k + 1))
                    if digit.getPixelID() == self.pixelID:
                        t = photon.getDetectionTime() - photon.getEmissionTime()
                        self.propTime.Fill(k + 1, t)
 

terminate()

def terminate

(

self

)

 Write histograms to file 

Definition at line 62 of file laserPixelIlumination.py.

    def terminate(self):
        ''' Write histograms to file '''
 
        tfile = TFile('laserPixelIlumination.root', 'recreate')
        for k in range(9):
            self.hist[k].Write()
        self.propTime.Write()
        tfile.Close()
 
 
# Create path

Member Data Documentation

hist

list hist

static

Initial value:

=  [TH2F('fiber' + str(k + 1), 'Pixel hit distribution from fiber No.' + str(k + 1),
                 64, 0.5, 64.5, 8, 0.5, 8.5) for k in range(9)]

2D histograms

Definition at line 34 of file laserPixelIlumination.py.

pixelID

int pixelID = 482

static

pixel ID

Definition at line 37 of file laserPixelIlumination.py.

propTime

TH2F propTime

static

Initial value:

=  TH2F('propTime', 'Photon propagation times for pixel ' + str(pixelID) +
                    ' vs. fiber number', 9, 0.5, 9.5, 200, 0.0, 1.0)

histogram

Definition at line 39 of file laserPixelIlumination.py.

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The documentation for this class was generated from the following file:

• top/examples/laserPixelIlumination.py