Visualisation of GPS output for learning

[MyPines]

Hi,

I am not sure if I am posting this in the correct category. I am planning on using the General Radiation Analysis software for Space (GRAS) application. As with all geant4 applications it uses the GPS module to generate the particle source distributions and I would like to know what options there are for generating and visualizing these distributions before I run an actual simulation with my actual detector geometry.

I have read in the GRAS documentation that there are decisions to be made about the normalisation of the source distribution and of the resulting fluence in a detector volume, but without concrete data to play with I find these topics difficult to understand and play with. Maybe the answer is that I use a simple toy geometry and just run GRAS with this model?

I hope this request is not too woolly and that someone has an idea of what I am on about!

Regards.

[allison]

Hi Richard

I don’t know anything about GRAS, I’m afraid, but in the underlying Geant4 it is possible to visualise the GPS sources with Geant4 commands - /vis/scene/add/gps. Get guidance (help /vis/scene/add/gps) .

Otherwise, simply viewing the trajectories of the generated particles will show you where the source(s) are.

Given a source, some of the generated particles are (hopefully) going to pass through and/or interact with your detector. That’s it! Record the number and energy deposited. Not sure what more you wish/need to know.

John