[Gate-users] monochromatic X-ray source

[Ashok Tiwari]

 Hello Howard, 
It looks like you are missing gps command in your source definition. See below for the working example (but using a point source, change that for your need):

|  | /gate/source/addSource monoenergetic_xray gps |
|  | /gate/source/monoenergetic_xray/gps/particle gamma |
|  | /gate/source/monoenergetic_xray/gps/energytype Mono |
|  | /gate/source/monoenergetic_xray/gps/ene/mono 30. keV |
|  | /gate/source/monoenergetic_xray/gps/angtype iso |
|  | /gate/source/monoenergetic_xray/gps/centre 0. 0. -80. mm |
|  | /gate/source/monoenergetic_xray/gps/type Point |
|  | /gate/source/monoenergetic_xray/attachTo my_phantom |
|  | /gate/source/monoenergetic_xray/visualize 100 yellow 2 |
|  | /gate/source/list |


Hope this helps.
Thanks,Ashok    On Sunday, 8 May 2022, 01:25:53 pm GMT-5, Howard <lomahu at gmail.com> wrote:  
 
 Hi,
I would like to simulate CBCT with a monoenergy X-ray source, say 30keV. Is there an easy way to implement this? I tried to set the following in the source macro but did not work. Do I have to set up the fluorescent X-ray for the monochromatic source? Any feedback would be appreciated.
Howard
/gate/source/addSource xraygun
/gate/source/verbose 0
/gate/source/xraygun/gps/verbose 0
# Particle type
/gate/source/xraygun/gps/particle gamma
# Source geometry
/gate/source/xraygun/gps/type Plane
/gate/source/xraygun/gps/shape Rectangle
/gate/source/xraygun/gps/halfx 0.025 mm
/gate/source/xraygun/gps/halfy 0.025 mm
# Source position
/gate/source/xraygun/gps/centre 0. 0. -80. mm
# Emission direction
/gate/source/xraygun/gps/mintheta  0. deg
/gate/source/xraygun/gps/maxtheta 15. deg
/gate/source/xraygun/gps/angtype iso
# Energy distribution
/gate/source/xraygun/gps/energytype Mono
/gate/source/xraygun/gps/monoenergy 30.0 keV
/gate/source/list_______________________________________________
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