|Message: Re: Cut influence in Gate/Geant4 for a 230 MeV proton beam||Not Logged In (login)|
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EM options are described in the Application Developer Manuel (chapter 5.2).
In the EM web there is a brief description of recommended EM builders: http://geant4.web.cern.ch/geant4/collaboration/working_groups/electromagnetic/physlist.shtml
The default EM configuration is used for HEP simulation, where minor details are not so important. The new "option3" variant is recommended as a concervative variant for relatively low-energy aplications like medical beams.
If number of materials in an application is not very large, then proposed higher than default number of bins will not be seen - tables will be filled in a reasonable time. If there about 1000 and more materials this may be a problem and one need to think how to choose an optimum between performance and accuracy. I would try to use option3.
Can you, please, send macro file, which you use for TestEm7 and which shows few mm difference depending on cut value?
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