Message: stuck track and aborted events Not Logged In (login)
 Next-in-Thread Next-in-Thread
 Next-in-Forum Next-in-Forum

Question stuck track and aborted events 

Forum: Biasing and Scoring
Date: 11 Jan, 2015
From: matthew <matthew>

I am using a primitive scorer to record deposited energy from electrons. the scorer is defined:

/score/create/boxMesh boxMesh_1
/score/mesh/boxSize 500. 500. 100. km
/score/mesh/nBin 50 50 50
/score/mesh/translate/xyz 0.0 0.0 2185 km


The point source is hundreds of km above the scorer. When running this way, I get lots of error messages of the form:

-------- EEEE ------- G4Exception-START -------- EEEE -------
*** G4Exception : GeomNav0003
      issued by : G4Navigator::ComputeStep()
Stuck Track: potential geometry or navigation problem.
        Track stuck, not moving for 25 steps
        in volume -boxMesh_1_3- at point (2.6038e+08,-2.48802e+08,2.285e+09)
        direction: (-0.0719718,-0.585694,0.807331).
*** Event Must Be Aborted ***
-------- EEEE -------- G4Exception-END --------- EEEE -------

I appear to be losing lots of events. This is not good considering I'm interested in recorded deposited energy from all events.

If I change the number of bins in the scorer just slightly to:

/score/mesh/nBin 50 50 51

I get a different error message that sometimes causes GEANT to freeze:

-------- WWWW ------- G4Exception-START -------- WWWW -------
*** G4Exception : GeomNav1002
      issued by : G4Navigator::ComputeStep()
May lead to a crash or unreliable results.
        Position has shifted considerably without notifying the navigator !
        Tolerated safety: 19149.9
        Computed shift : 1.4749e+12
*** This is just a warning message. ***
-------- WWWW -------- G4Exception-END --------- WWWW -------

What am I doing wrong? How should I define the scorer in a way that doesn't drop events or cause GEANT to lock up on me?

Any suggestions are greatly appreciated.

matt

Inline Depth:
 1 1
 All All
Outline Depth:
 1 1
 2 2
 All All
Add message: (add)

1 None: Re: stuck track and aborted events   (Tsukasa Aso - 11 Jan, 2015)
1 None: Re: stuck track and aborted events   (matthew - 12 Jan, 2015)
2 None: Re: stuck track and aborted events   (Makoto Asai - 12 Jan, 2015)
1 None: Re: stuck track and aborted events   (matthew - 12 Jan, 2015)
(_ None: Re: stuck track and aborted events   (Makoto Asai - 12 Jan, 2015)
(_ None: Re: stuck track and aborted events   (matthew - 12 Jan, 2015)
(_ None: Re: stuck track and aborted events   (Makoto Asai - 12 Jan, 2015)
1 None: Re: stuck track and aborted events   (matthew - 12 Jan, 2015)
... 3 Message(s)
2 Ok: Re: stuck track and aborted events   (Reza - 06 Oct, 2015)
3 Ok: Re: stuck track and aborted events   (Reza - 06 Oct, 2015)
 Add Message Add Message
to: "stuck track and aborted events"

 Subscribe Subscribe

This site runs SLAC HyperNews version 1.11-slac-98, derived from the original HyperNews