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None Physics Process to include to take care of x-ray polarization 

Forum: Space Applications
Date: 30 May, 2006
From: Manju Sudhakar <Manju Sudhakar>

Hi,

I am working on a first step x-ray polarimeter design.I want to measure the polarization of low energy x-rays after scattering from a target. So, inorder to do that, I need to include, in the physics list a process that takes care of polarization. There is a physics process "G4LowEnergyPolarizedComptonScattering", but it is not used in any of the examples ..

And another thing is that in the http://geant4.esa.int/events/g4suw03/ site, there are a number of presentations that mention polarized photoelectric, Rayleigh scattering, pair production etc. And in the photoelectric presentation , there is a page where they show the actual track of the photon, and it is mentioned "G4LowEnergyPolarizedPhotoelectric".

I am using GEANT version 4.7.0.p01.
In the directory /geant4/geant4.7.0.p01/source/processes/electromagnetic/lowenergy/include, 
the only low energy polarization physics process is G4LowEnergyPolarizedComptonScattering
is there. Also, there is no PolarizationManager. In the paper by Ralph Dollan, Karim Laihem 
and Andreas Schalicke "Monte Carlo based studies of a polarized positron 
source for International Linear Collider (ILC)" (arXiv:physics/0512192 v1), they talk about 
polarization framework in GEANT4 .. They talk about "proposed implementation of polarized processes" 
 ... so are these yet to be implemented ?? In the latest version of GEANT, 
are these implemented ??

So, in the version of GEANT that I am using, 4.7.0.p01, the only physics process that is available is "G4LowEnergyPolarizedComptonScattering".

Could you please give me more information about the proposed implementation of polarization ? Is it already implemented ?

Thanks in advance, Manju Sudhakar.

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1 None: Re: Physics Process to include to take care of x-ray polarization   (Maria Grazia Pia - 02 Jun, 2006)
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