[Run issue]: Gvalue for a simulation including a magnetic field

[Audrey622]

What was the issue?

Hi!

I'm trying to obtain Gvalues for the simulation of a beam of electrons passing through a geometry made of G4_WATER in the presence of a magnetic field. However, the following error is being returned:

(...)
G4WT1 > Begin processing for Run: 0, History: 0
G4WT1 >
-------- EEEE ------- G4Exception-START -------- EEEE -------
*** G4Exception : NoExternalFieldSupport
issued by : G4ITTransportation::AlongStepGetPhysicalInteractionLength
ITTransportation does not support external fields. If you are dealing with a tradiational MC simulation, please use G4Transportation.
*** Fatal Exception *** core dump ***
G4WT1 > G4Track (0x752fbd4e0300) - track ID = -19, parent ID = -6
(...)

Is there a way to obtain the Gvalue for this simulation?

TOPAS-nBio category

Scoring

Version

3.0

What Operative System (OS) are you running on?

Linux (Debian/Ubuntu)

Relevant log output

No response

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Attestation

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[JoseRamosMendez]

In the current implementation of the chemistry, species don't interact with magnetic fields. Perhaps you could save the electron track's phase space simulated in the presence of a magnetic field and then use it for the G-value calculation.
Good luck!

[Audrey622]

Thank you a lot for your answer! It was all I needed to know!