How to create a conical source (mamography) in Vgate

AI Thread Summary
To create a conical source in Vgate, it’s important to clarify whether the goal is a conical shaped volume or a conical beam. For a conical beam, a circular aperture can be used, though a shadow mask may be less efficient. Adjust the source parameters by setting the angular distribution of emission and defining minimum and maximum emission angles. This setup will produce a conical beam directed along the Z-axis. Accurate trigonometric calculations may be necessary for precise angle adjustments.
Alexander Camargo
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I am new in Vgate software.
I've tried a lot of things, but nothing works. I need to create a conical source that is 4 cm in radius and 16 cm in length. Example in photo attached
exemplo do que preciso.png
 
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Do you mean a conical source, a conical shaped volume which emits, or do you mean a conical beam? You can set min and max emission angles for sources.
 
Alex A said:
Do you mean a conical source, a conical shaped volume which emits, or do you mean a conical beam? You can set min and max emission angles for sources.
conical beam with a focal spot of 0.3mm. The focal spot is not problema, my problem is create a conical beam
 
A conical beam for a point source is produced with a circular aperture.

Conical beam.png
 
A shadow mask is functional but may be inefficient.

Consider editing the source parameters to something like;

Code:
# SET THE ANGULAR DISTRIBUTION OF EMISSION
/gate/source/yoursourcename/gps/angtype iso
# SET MIN AND MAX EMISSION ANGLES
/gate/source/yoursourcename/gps/mintheta 0. deg
/gate/source/yoursourcename/gps/maxtheta 14. deg
/gate/source/yoursourcename/gps/minphi    0. deg
/gate/source/yoursourcename/gps/maxphi 360. deg

This is the spherical physics coordinate system. This should produce a conical beam in the Z direction.

Redo the trig to get a more accurate angle if you need it.
 
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