Message: Re: Problems in the number of Cerenkov optical photons. Not Logged In (login)
 Next-in-Thread Next-in-Thread
 Next-in-Forum Next-in-Forum

Feedback Re: Problems in the number of Cerenkov optical photons. 

Forum: Particles
Re: Question Problems in the number of Cerenkov optical photons. (Andreas Battaglia)
Date: 30 Nov, 2005
From: Gumplinger Peter <Gumplinger Peter>

Hi Andreas,

> So I had to match the energy ranges each other and the warnings disappear.

Yes, you need to specify the refractive index, absorption length etc. over the full range of photons you eventually propagate in a material. But I don't think you needed to extend the range over which you generate scintillation photons. And yes, the WLS absorption needs to cover the scintillation photon range.

Now, as for the number of Cerenkov photons, please take a look at the Physics Reference Manual for Cerenkov:

http://wwwasd.web.cern.ch/wwwasd/geant4/G4UsersDocuments/UsersGuides/PhysicsReferenceManual/html/node37.html

where you'll see that the number of Cerenkov photons depends on the wavelength interval, which in turn, is defined by the range over which you specify the refractive index.

What you must be concerned about is only the range of wavelength to which your photon detector is directly sensitive or the range which is shifted into wavelengths to which your photon detector is sensitive. It is important that you produce all the Cerenkov photons in that range.

Inline Depth:
 1 1
 All All
Outline Depth:
 1 1
 2 2
 All All
Add message: (add)

 Add Message Add Message
to: "Re: Problems in the number of Cerenkov optical photons."

 Subscribe Subscribe

This site runs SLAC HyperNews version 1.11-slac-98, derived from the original HyperNews


[ Geant 4 Home | Geant 4 HyperNews | Search | Request New Forum | Feedback ]