[Gate-users] Not generating optical photons

Vesna Cuplov vesna.cuplov at gmail.com
Mon Jan 20 19:45:02 CET 2014

Hi Amy,

Did you turn the Optical flag on when compiling vgate? Could you


On Mon, Jan 20, 2014 at 5:32 PM, Amy Meldrum <ameldru at g.clemson.edu> wrote:

> Gate Users,
> In an attempt to simplify my simulation to identify the problems, I am
> using VGate to model an alpha source, a plastic scintillator, and a PMT.
> However, when I run my simulation nothing happens; no optical photons are
> generated.
> I use the OpticalSystem, and set my scintillator material to be a
> crystalSD. I have defined my surfaces and have the surface going from my
> scintillator to PMT set as perfect_apd (dielectric-metal). My alpha source
> is placed just above the scintillator.
> For physics I have:
> /gate/physics/addProcess Scintillation
> /gate/physics/addProcess OpticalAbsorption
> /gate/physics/addProcess OpticalRayleigh
> /gate/physics/addProcess OpticalBoundary
> /gate/physics/processList Enabled
> I am at a loss as for why nothing seems to happen with my simulation. Is
> there something I am missing or forgot to define?
> Thank you for helping,
> -Amy
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Dr. Vesna Cuplov
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