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On Sat, 27 May 2006, Yun-Ha Shin wrote: > *** Discussion title: Event and Track Management > Email replies to PublicHyperNews@slac.stanford.edu must include: > In-Reply-To: <"/eventtrackmanage/491"@geant4-hn.slac.stanford.edu> > Subject: ...change this to be about your reply. > > Dear All, > > I'm trying to get ionization points in a TPC chamber as hits. To get > reasonable result I need to have step lenths about a mm order or smaller > than that. To make it simple I used LHEP as my physics lists and got > step length of few mm's, sometimes few cm's, which is far larger than > expected, for e,pi and mu of few 100s MeV to few GeV. > > Is there any simple way to get the finer step length ? > > Thanks in advance to all comments/advices ;-) > > Yun-Ha Shin > Hello, You need to establish step limit for TPC gas volume. There are several ways to do that: 1) Using G4UresLimits and G4SteplImiter process distributed with process/transportation cathegory 2) Take one of StepLimiters from examples/extended/electromagnetic/TestEm2 , 3, 7,9... VI
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