|Message: Meaning of /gps/pos/sigmax||Not Logged In (login)|
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If I have well understood, setting a certain geometrical volume as source using the general particle source makes Geant4 produce particles in that volume with a CONSTANT probability density. Therefore the standard deviation should be the constant probability density's standard deviation.
But according to the guide for application developers one can set f.e. the x-standard-deviation to a certain wished value using /gps/pos/sigmax. How is it possible ? Can anybody explain the real meaning of the commands /gps/pos/sigmax, /gps/pos/sigmay etc. ? And why is the default standard deviation = 0 (according to the guide)?
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