GSI Forum: Monte Carlo Engines » Group velocity for Cherenkov photon propagation in G3/G4

Home » PANDA » PandaRoot » Monte Carlo Engines » Group velocity for Cherenkov photon propagation in G3/G4

Show: Today's Messages :: Polls :: Message Navigator

Re: Group velocity for Cherenkov photon propagation in G3/G4 [message #11458 is a reply to message #11457]

Wed, 26 January 2011 12:41

StefanoSpataro
Messages: 2736
Registered: June 2005
Location: Torino

first-grade participant

From: *vpn.unito.it

Hi,
as far as I know, for optically active materials you define in your media_pnd.geo the refraction index for each wavelenght (in the media file as photon momentum). Then G3 and G4 should use v = c/n. Just guessing, I think there is no group velocity but just the propagation of each single photon.

You could, inside your PndDrc::ProcessHits, store at entrance and at the exiting point the position and the time of the cherenkov photon, therefore easily calculate the velocity and compare it with the foreseen value.

Hope it helps somehow.

Report message to a moderator

[Message index]

		Group velocity for Cherenkov photon propagation in G3/G4 By: Jochen Schwiening on Wed, 26 January 2011 11:46
		Re: Group velocity for Cherenkov photon propagation in G3/G4 By: StefanoSpataro on Wed, 26 January 2011 12:41
		Re: Group velocity for Cherenkov photon propagation in G3/G4 By: Jochen Schwiening on Wed, 26 January 2011 14:12
		Re: Group velocity for Cherenkov photon propagation in G3/G4 By: StefanoSpataro on Wed, 26 January 2011 14:37
		Re: Group velocity for Cherenkov photon propagation in G3/G4 By: Mohammad Al-Turany on Wed, 26 January 2011 14:53
		Re: Group velocity for Cherenkov photon propagation in G3/G4 By: Jochen Schwiening on Wed, 26 January 2011 17:41
		Re: Group velocity for Cherenkov photon propagation in G3/G4 By: Jochen Schwiening on Thu, 27 January 2011 11:33
		Re: Group velocity for Cherenkov photon propagation in G3/G4 By: Oliver Merle on Fri, 28 January 2011 19:04
		Re: Group velocity for Cherenkov photon propagation in G3/G4 By: Mohammad Al-Turany on Wed, 26 January 2011 21:23
		Re: Group velocity for Cherenkov photon propagation in G3/G4 By: Jochen Schwiening on Fri, 28 January 2011 19:14
		Re: Group velocity for Cherenkov photon propagation in G3/G4 By: Oliver Merle on Fri, 28 January 2011 19:39
		Re: Group velocity for Cherenkov photon propagation in G3/G4 By: Jochen Schwiening on Fri, 28 January 2011 21:33
		Re: Group velocity for Cherenkov photon propagation in G3/G4 By: Jochen Schwiening on Mon, 11 April 2011 15:25

Previous Topic:	future of GEANT
Next Topic:	[Solved]Problem with PndEvtGenDirect

Goto Forum:

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Sun Mar 16 11:34:26 CET 2025

Total time taken to generate the page: 0.00769 seconds