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Group velocity for Cherenkov photon propagation in G3/G4 [message #11457] Wed, 26 January 2011 11:46 Go to previous message
Jochen Schwiening is currently offline  Jochen Schwiening
Messages: 78
Registered: June 2009
Location: GSI, Darmstadt
continuous participant
From: *gsi.de
Hi folks,

I am looking at the time of propagation of Cherenkov photons
inside the DIRC radiator bars and see some slightly odd values.
This prompts the question how the velocity of the photon is
calculated in our framework. Does our VMC properly calculate
the group velocity of the Cherenkov photons from the material
index tables? Does that happen correctly in both G3 and G4?
Do any of you know and maybe know how to check the velocity
of the photon of a given wavelength, for instance in our
PndDrc.cxx code?

Thanks,
Jochen
 
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