|Message: Does AIDA affect a Geant4 simulation?||Not Logged In (login)|
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Hello, Can anyone tell me if the use of AIDA (via the G4ANALYSIS_USE option) affects the results/output of a Geant4 simulation? The reason I ask this question is that when I run the A01 extended example with a given number of events, the output is different when AIDA is used (G4ANALYSIS_USE = 1) and when not used (G4ANALYSIS_USE = 0) even though the same initial random number seed is used in both cases. This is similarly true with the Hadrontherapy example (after changing it so that the data is dumped out when AIDA is not used). I have yet to check if the difference in the outputs are statisically significant. I had the impression that the use of AIDA should not have any effect on the simulation at all (unless it generates it's own random numbers, of course) and would expect the output/transport to be identical if the same seeds are used. Is this a reasonable assumption? I am using Geant4.8.0.p01 with AIDAJNI-3.2.3 & JAIDA-3.2.4 installed under Mandrake Linux 9.1. Thanks in advance. David.
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