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Question Overlap with mother volume ! 

Forum: Geometry
Date: 04 Aug, 2014
From: Ioan-Charly <Ioan-Charly>

Hi,

For me i have a simple geometry three tubs of 10mm radius and 5um thick for the first one, 400um for the second one and for the last one 5cm.

When i run the command /geometry/test/run, i have this message :

Running geometry overlaps check...
Checking overlaps for volume Wtarget ... 
-------- WWWW ------- G4Exception-START -------- WWWW -------
*** G4Exception : GeomVol1002
      issued by : G4PVPlacement::CheckOverlaps()
Overlap with mother volume !
          Overlap is detected for volume Wtarget
          with its mother volume world
          at mother local point (4.95596,-6.80934,-0.505002), overlapping by at least: 6.80934 mm 
NOTE: Reached maximum fixed number -1- of overlaps reports for this volume !
*** This is just a warning message. ***
-------- WWWW -------- G4Exception-END --------- WWWW -------
Checking overlaps for volume Windtarget ... 
-------- WWWW ------- G4Exception-START -------- WWWW -------
*** G4Exception : GeomVol1002
      issued by : G4PVPlacement::CheckOverlaps()
Overlap with mother volume !
          Overlap is detected for volume Windtarget
          with its mother volume world
          at mother local point (4.59505,-1.82551,-0.500001), overlapping by at least: 1.82551 mm 
NOTE: Reached maximum fixed number -1- of overlaps reports for this volume !
*** This is just a warning message. ***
-------- WWWW -------- G4Exception-END --------- WWWW -------
Checking overlaps for volume detector ... 
-------- WWWW ------- G4Exception-START -------- WWWW -------
*** G4Exception : GeomVol1002
      issued by : G4PVPlacement::CheckOverlaps()
Overlap with mother volume !
          Overlap is detected for volume detector
          with its mother volume world
          at mother local point (-9.99496,-0.317374,43.4671), overlapping by at least: 317.374 um 
NOTE: Reached maximum fixed number -1- of overlaps reports for this volume !
*** This is just a warning message. ***
-------- WWWW -------- G4Exception-END --------- WWWW -------
Geometry overlaps check completed ! 

I am interested of the geometry management because i had some strange result... Indeed, when i gun some electron of 0.1MeV the azimuthal distribution are not uniform. However, it must be!

How can i fix this overlap and it is possible that the "strange" result is caused by the overlap ?

Thanks in advance for your time,

best,

IC

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1 None: Re: Overlap with mother volume !   (John Apostolakis - 05 Aug, 2014)
(_ None: Re: Overlap with mother volume !   (Ioan-Charly - 05 Aug, 2014)
(_ None: Re: Overlap with mother volume !   (Michael H. Kelsey - 06 Aug, 2014)
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