I want to use GPS to define a solid annulus source. But when using the command
I can not found annulus that define in volume. Only Sphere, Ellipsoid, Cylinder ,Para
(parallelepiped) could be used.
So I desire to use the command /gps/pos/confine to confine my gps .
However not sure I define the gps is solid.
This is my code
/gps/pos/centre 0 0 0
#/gps/pos/inner_radius 4.293 cm
/gps/pos/radius 25 cm
/gps/pos/halfz 1 cm
/gps/ion 27 60
/gps/ene/mono 0 eV
As a beginner I really appreciate your advice and guidance，Thank you for your help