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Forum: Medical Applications
Re: Question Hadrontherapy example
Date: 18 Dec, 2013
From: Francesco Romano <Francesco Romano>

Dear Sarah,
the Hadrontherapy example, as other ones, uses the GPS (General Particle Source) for primary event generation. Hence, you can use all the available commands provided by this tool (please, have a look also to the related guide: http://reat.space.qinetiq.com/gps/new_gps_sum_files/gps_sum.htm).
Specifically, for the case of the energy, you can use the proper command that you will find in one of the provided macro files. For instance, in the hadron_therapy.mac macro file, you will find the command:
/gps/ene/mono 62 MeV
and you may change the value of the incident anergy, as well as many other parameters you'll find in the macro file. You can find these files inside the "macro" directory (inside your build directory).

To change the material, in general you have to do that in your DetectorConstruction.cc file, and you can find a detailed explanation on that in the User's Guide for Application Developers.
In particular, in the Hadrontherapy example you may also use the following command to change the phantom material:
/changePhantom/material
To change the materials of other volumes you have to edit the HadrontherapyDetectorConstrucion.cc file and modify the specific LogicalVolume.

Best regards,
Francesco

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