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 #11474 is a reply to message #11465]

Fri, 28 January 2011 19:04

Oliver Merle
Messages: 13
Registered: December 2010

occasional visitor

From: *wlan.uni-giessen.de

I checked the group velocity upstream in Geant4 and everything seems to be correct.

Method:
Create photons of different wavelength in a fused silica radiator (manually, not via the Cherenkov process). Export velocity of G4OpticalPhotons and a computed group velocity (using an approximation of n_g = n_p - lambda* dn/dlambda)

Result:
Attached

If a bug exists, it is most likely related to wrong material property maps.

Oliver

Attachment: Geant4-GroupVelocity.png
(Size: 79.41KB, Downloaded 536 times)
Attachment: wl_vs_vg.txt
(Size: 8.58KB, Downloaded 376 times)

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 Jun 15 17:16:43 CEST 2025

Total time taken to generate the page: 0.00540 seconds