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Note G4Cerenkov and G4StepLimiter/StepMax 

Forum: Processes Involving Optical Photons
Date: 14 Jan, 2010
From: Gumplinger Peter <Gumplinger Peter>

Somebody asked me by email yesterday (I lost the email) if one should expect the Cerenkov photon simulation to depend on the step size. I would expect not statistically as far as detector response is concerned. However, individual events will certainly be different not only because Cerenkov photos originate rectilinear along different step segments, but the initial and final velocities will also be different and hence the number of photons generated during the step. Also, in the case Cerenkov photons are produced inside a magnetic field, the rectilinear approximation must be kept in mind for helical tracks.

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