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Forum: Physics List
Date: 10 Sep, 2015
From: JanW <JanW>

Hello,

I am trying myself on a simulation of an experiment involving 
Møller-Scattering.
The setup is as simple as it could get:
Polarized electrons with 130MeV are shot at a polarized target, both 
polarized in the Direction of the beam for a maximum affect of the spin 
polarization on the scattering. I then measure the intensity of the beam 
as a function of the angle Theta(Initial Momentum -> 
After-Scattering-Momentum). I expect it to be depending on the 
polarization...

My Physics List is constructed like this:

   G4VModularPhysicsList* physicsList = new G4VModularPhysicsList;
   physicsList->RegisterPhysics(new G4EmLivermorePolarizedPhysics);
   runManager->SetUserInitialization(physicsList);

I polarize my electrons via macro file:

   /gun/polarization 0. 0. 1.

and

   /gun/polarization 0. 0. -1.

My target, which I am shooting at, is polarized via the PolarizationManager:

   G4PolarizationManager * polMgr = G4PolarizationManager::GetInstance();
polMgr->SetVolumePolarization(fLogicTarget,G4ThreeVector(0.,0.,1.));

Sadly, with this setup, I cannot reproduce the expected polarization 
dependence. Furthermore, in Example Pol01 I also can't see any 
dependence of the produced data on the polarization.
I am a little confused here and very happy about any help.

Cheers
Jan


-- 
Jan Wissmann
TU Darmstadt - Institut fuer Kernphysik
Schlossgartenstrasse 9
D-64289 Darmstadt

Tel.: +49 6151/16-5121
Office: S214/101
Email: jwissmann@ikp.tu-darmstadt.de

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1 Sad: Re: Spin polarized electrons   (JanW - 15 Sep, 2015)
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