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Forum: Event and Track Management
Re: Question Purpose of managing the stacks (Vlasios Vasileiou)
Date: 23 Apr, 2004
From: Jeremy McCormick <Jeremy McCormick>


For an example of StackingAction "in action" see ExN04.

Here are some legitimate and useful reasons for using StackingAction:

1) Simulate the background from "looper" particles in a detector 
   by postponing them until the next event.

2) Kill or wait on tracks you don't care much about (i.e. leaving the world,
   simulate others first, etc.).  It can more efficiently perform some of the 
   track management usually put in TrackingAction.

3) Manage the stages of your event simulation by waiting until all tracks
   have reached a certain volume boundary, status, etc.

4) Manage individual jet processing.

5) Improve performance.

6) Set up some experimental-based priority among your tracks.

7) Event filtering.

8) Access and set various information based on having a particle and
   its secondaries all on the stack.

9) Analysis -- for instance, counting the number of optical photons

Also, see the User Application Guide's section on "Optional User Actions":

Makoto Asai is an expert on this...

See pages 12-15 from this G4 Tutorial talk:


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1 None: Re: Purpose of managing the stacks   (michel maire - 24 Apr, 2004)
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