To kill all secondaries use:

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in .cfg file:

VPSet Watchers = {

{

string type = "KillSecondariesRunAction"

} }

To kill secondary baryons and ions below threshold use:

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in .cfg file:

replace g4SimHits.Watchers = {

{string type = "KillSecondariesTrackAction"

using common_heavy_suppression

} }

and play with the default settings of common_heavy_suppression using

replace common_heavy_suppression.SuppressHeavy = true

and also the thresholds: IonThreshold, NeutronThreshold, ProtonThreshold

(momenta values given in MeV/c)