Exaplanation of B1 example

I successfully have run the basic B1 example. I used beamOn command to see the tracks and results. But I don’t understand the outputs. Can anyone please explain? Thanks in advance.

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50 events have been kept for refreshing and/or reviewing.
“/vis/reviewKeptEvents” to review them one by one.
“/vis/enable”, then “/vis/viewer/flush” or “/vis/viewer/rebuild” to see them accumulated.
/run/beamOn 150
Region – – appears in world volume
This region is in the mass world.
Root logical volume(s) : World
Pointers : G4VUserRegionInformation[0], G4UserLimits[0], G4FastSimulationManager[0], G4UserSteppingAction[0]
Materials : G4_AIR G4_WATER G4_A-150_TISSUE G4_BONE_COMPACT_ICRU
Production cuts : gamma 700 um e- 700 um e+ 700 um proton 700 um
Region – – is not associated to any world.
Root logical volume(s) :
Pointers : G4VUserRegionInformation[0], G4UserLimits[0], G4FastSimulationManager[0], G4UserSteppingAction[0]
Materials :
Production cuts : gamma 700 um e- 700 um e+ 700 um proton 700 um
========= Table of registered couples ==============================
Index : 0 used in the geometry : Yes
Material : G4_AIR
Range cuts : gamma 700 um e- 700 um e+ 700 um proton 700 um
Energy thresholds : gamma 990 eV e- 990 eV e+ 990 eV proton 70 keV
Region(s) which use this couple :
DefaultRegionForTheWorld
Index : 1 used in the geometry : Yes
Material : G4_WATER
Range cuts : gamma 700 um e- 700 um e+ 700 um proton 700 um
Energy thresholds : gamma 2.51944 keV e- 276.265 keV e+ 270.751 keV proton 70 keV
Region(s) which use this couple :
DefaultRegionForTheWorld
Index : 2 used in the geometry : Yes
Material : G4_A-150_TISSUE
Range cuts : gamma 700 um e- 700 um e+ 700 um proton 700 um
Energy thresholds : gamma 2.27786 keV e- 299.466 keV e+ 293.489 keV proton 70 keV
Region(s) which use this couple :
DefaultRegionForTheWorld
Index : 3 used in the geometry : Yes
Material : G4_BONE_COMPACT_ICRU
Range cuts : gamma 700 um e- 700 um e+ 700 um proton 700 um
Energy thresholds : gamma 3.95224 keV e- 397.122 keV e+ 384 keV proton 70 keV
Region(s) which use this couple :
DefaultRegionForTheWorld

Run 3 starts.

WARNING: G4VisManager::EndOfEvent: Automatic event keeping suspended.
The number of events exceeds the maximum, 100, that may be kept by
the vis manager.
Run terminated.
Run Summary
Number of events processed : 150
User=0.060000s Real=0.082252s Sys=0.010000s
--------------------End of Global Run-----------------------
The run consists of 150 gamma of 6 MeV
Cumulated dose per run, in scoring volume : 4.60887 picoGy rms = 1.23673 picoGy

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