How to use the AddWhiteNoise() function in Garfield++?

Garfield++
1

Dear experts,
I am using the AddWhiteNoise() function to simulate the noise of the gaseous detector. But There’s something I don’t understand about this function. Does this function need add to the the induced current signal ? Then, What’s the effection of the parameter(q0) ?

Code:

signal View->SetSensor(sensor);
sensor->SetTransferFunction(transfer);

const bool poisson = true;
double enc = 25;
double q0 = 25.;
sensor->AddWhiteNoise(enc,poisson,q0);

constexpr bool fft = true;
sensor->ConvoluteSignals(fft);

signalView->SetCanvas(c1);
signalView->SetLabelY("signal [mv]");
signalView->PlotSignal("readout");
2

Hi,

you can find a description of the formalism behind the AddWhiteNoise function in Section 7.1.1 of the user guide:

With the poisson flag set to true, q0 is the amplitude of the noise pulses added to the induced current signal.

3

Thank you for your reply.
Best wishes!