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Question Why the same Energy Deposition????puzzle over N03 & N04  

Keywords: all the same
Forum: Documentation and Examples
Date: 09 Sep, 2004
From: Yang <yohin@263.net>

hi,all. I run the N03,it output a result,it seems good.I exit it and run the N03 again,it also output a result.BUT when I checked the two results ,I found they were absolute same!same the energy deposition,same the primary interaction position and same the tracking ,I puzzeld why two runs got a same simulate result at all. Then,I run the N04 twice ,but the two runs gave me the results all the same. I didn't understand why the two random simulations can get the same results exactly? If the detector construction ,random seed,sprimary particle and its energy are defined,the result defined too? During one run,the ervery event result is different ,but when the two run exectued independently are compared,a found can get that the every event results in the two runs are same by thier sequence. why is that? Help me! The N3 results as below:

1.the first run results ......... /tracking/verbose 2 /run/beamOn 2 ......... ### Run 0 start. Start Run processing. .......... ---> Begin of event: 0

--------- Ranecu engine status ---------
 Initial seed (index) = 0
 Current couple of seeds = 9876, 54321
----------------------------------------
.........
---> End of event: 0
   Absorber: total energy: 38.046357 MeV       total track length: 2.6101343 cm 
        Gap: total energy: 10.346082 MeV       total track length: 4.955698 cm 

---> Begin of event: 1

--------- Ranecu engine status ---------
 Initial seed (index) = 0
 Current couple of seeds = 144890858, 539354602
----------------------------------------
.........
---> End of event: 1
   Absorber: total energy: 45.358425 MeV       total track length: 3.4031446 cm 
        Gap: total energy: 226.79746 keV       total track length: 433.78885 mum
Run terminated.
Run Summary
  Number of events processed : 2
  User=0.12s Real=0.74s Sys=0s
Idle> 

2.the second run results ......... /tracking/verbose 2 /run/beamOn 2 ......... ### Run 0 start. Start Run processing. .......... ---> Begin of event: 0

--------- Ranecu engine status ---------
 Initial seed (index) = 0
 Current couple of seeds = 9876, 54321
----------------------------------------
.........
---> End of event: 0
   Absorber: total energy: 38.046357 MeV       total track length: 2.6101343 cm 
        Gap: total energy: 10.346082 MeV       total track length: 4.955698 cm 

---> Begin of event: 1

--------- Ranecu engine status ---------
 Initial seed (index) = 0
 Current couple of seeds = 144890858, 539354602
----------------------------------------
.........
---> End of event: 1
   Absorber: total energy: 45.358425 MeV       total track length: 3.4031446 cm 
        Gap: total energy: 226.79746 keV       total track length: 433.78885 mum
Run terminated.
Run Summary
  Number of events processed : 2
  User=0.12s Real=0.74s Sys=0s
Idle> 

Help me,Thanks

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