openmc.stats.CylindricalIndependent angle orientation

Hello, I’ve got a question linked to the CyldricalIndependant angle orientation.
The documentation ( openmc.stats.CylindricalIndependent — OpenMC Documentation) says:

  • phi (openmc.stats.Univariate) – Distribution of phi-coordinates (azimuthal angle) in a reference frame specified by the origin parameter

Is the frame of angle going from X+ to Y+ ? There is nothing specified on this, and as my case is dependant of the angle, I don’t want to have my emissions rotating…

Thnaks, Thomas