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None Re: Forced Bremsstrahlung Interaction in specific Volume 

Forum: Biasing and Scoring
Re: None Forced Bremsstrahlung Interaction in specific Volume (Niemes, Simon)
Date: 08 Jan, 2013
From: Daren Sawkey <Daren Sawkey>

> I found the command set ForcedInteraction, but seems to have no effect 
> and no proper documentation.

Hi, the command should work. Can you try it in one of the
extended/electromagnetic examples, e.g. TestEm11? It looks like it is only
documented in the command line help however. 

Command /process/em/setForcedInteraction
Guidance :                              
Set factor for the process cross section.
  procNam    : process name              
  regNam     : region name               
  tlength    : fixed target length       
  tflag      : flag to change weight     

> Would this be the correct command the increase the cross-section in a 
> specific volume and where can I find more information about 
> setForcedInteraction?

It doesn't actually increase the cross-section. Rather it forces the particular
interaction to occur in a distance tlength. I don't know what the effect on the
electron spectrum (and hence photon spectrum) is. 

I'd suggest posting to the Electromagnetic processes forum where you might get
a better response.

> At the moment I am using the command: setBiasingFactor eBrem 1000 1000 
> to boost the bremsstrahlung cross-section, but this only works globaly.

You could divide the simulation up, such that the water is global.

  --  Daren.

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