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Idea Re: Set number of events 

Forum: Run Management
Re: Question Set number of events
Date: 14 Aug, 2014
From: Michael H. Kelsey <Michael H. Kelsey>

On Wed, 13 Aug 2014 20:02:03 GMT, Frank wrote:
> I shoot hundreds of gammas on a scintillator. Some of the gammas
> interact with the scintillator (~25%) and some don't (~75%).
> 
> Is there a way to stop a simulation when 100 photoelectric events (all
> other effects are inactivated) have occurred?
> 
> In interactive mode, when I use /run/beamOn 400, I get ~100 &#65533; 20
> photoelectric events, but I would like to shoot the right amount of
> beamOn to get precisely 100 photoelectric events each time I run a
> simulation without hoping to be lucky in getting 100 photoelectric
> events.

You may want to look at G4's biasing functionality (see the Application Developer's Guide). With biasing you can set a process to "always happen". Obviously, the rate you get out won't be physical, but that is exactly what you are looking for in this case.

  -- Michael Kelsey

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1 None: Re: Set number of events   (michel maire - 21 Aug, 2014)
(_ Feedback: Re: Set number of events   (Michael H. Kelsey - 21 Aug, 2014)
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