Problem 1434 - strange tracking behavior
Summary: strange tracking behavior
Status: RESOLVED DUPLICATE of problem 1403
Alias: None
Product: Examples/Basic and Novice
Classification: Unclassified
Component: general (show other problems)
Version: 9.6
Hardware: Apple Linux
: P5 trivial
Assignee: Vladimir.Ivantchenko
URL:
Depends on:
Blocks:
 
Reported: 2013-01-31 22:17 CET by janstar1122
Modified: 2013-02-25 19:55 CET (History)
1 user (show)

See Also:

Attachments
Left G4.9.6=bad, right G4.9.p02=good (34.46 KB, image/png)
2013-01-31 22:17 CET, janstar1122 		Details
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Description janstar1122 2013-01-31 22:17:40 CET 
Created attachment 203 [details]
Left G4.9.6=bad,  right G4.9.p02=good

Hi,
I have installed Geant 4.9.6 on SL5.8 inside a Virtual Machine running on Mac under WMware.

A test job, attached, shows how single electron w/ PT=50 MeV is being tracked in an empty space filled with Air and 0.5T B-filed.

The plot on the left shows strange zig-zags are from my new installation of G4.9.6 on SL5.8.
The plot on the right is from my old VM running G4.9.02p on SL5.6 - I think this is good result.

The same files were compiled & executed on both VM's.

I'm not that familiar with Geant to decide how to debug the issue.
Can you advice me?
Thanks
Jan Balewski
Comment 1 asai 2013-02-01 21:42:35 CET 
Thank you for reporting this problem.
We believe this problem is caused by the same bug as reported on the report #1403. We have found the fix and we expect a patch to be released in a few days.
Thank you  once again.
Makoto Asai
Comment 2 Vladimir.Ivantchenko 2013-02-05 19:50:10 CET 
Hello,

Thanks for the plot. You are right that Geant4 9.6 has a serious bug for tracking in magnetic field. The fix is prepared for the patch01 which should be available this week. Please, try to rerun your setup with the patch version.

VI
Comment 3 janstar1122 2013-02-21 20:20:16 CET 
I confirm the problem has been resolved in G4.9.6.p01
Thanks
Comment 4 Vladimir.Ivantchenko 2013-02-25 19:55:06 CET 

*** This problem has been marked as a duplicate of problem 1403 ***