[Gate-users] sphere surface source definition

[SUNLIANG]

Hi, everyone, I want to define a source uniformly distributed on a sphere surface with direction towards inside sphere, but not limited to center of  the sphere. I tried the codes listed below, 


/gate/source/addSource                egun   gps
/gate/source/egun/gps/particle   e-
/gate/source/egun/gps/monoenergy 2 keV 
/gate/source/egun/gps/type       Surface
/gate/source/egun/gps/shape      Sphere 
/gate/source/egun/gps/radius     1.0  mm
/gate/source/egun/gps/centre     0.0 0.0 0.0 mm 
/gate/source/egun/gps/angtype    iso                    #1
/gate/source/egun/gps/mintheta   90.  deg           #2
/gate/source/egun/gps/maxtheta   180. deg         #3
/gate/source/egun/gps/minphi     0.   deg            #4
/gate/source/egun/gps/maxphi     360. deg         #5



Q1: when I run numbers of particles, I always got some particles "lost", namely the particles launched to sphere outside rather than inside.
Q2: when I comment the line ended with #1~#5, nothing changed, why? how can I get the correct code arrangement.
thanks


SL




-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.opengatecollaboration.org/pipermail/gate-users/attachments/20190211/575a72cc/attachment.html>