Use field-free media for the L3 magnet and the compensator - #15694
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Use field-free media for the L3 magnet and the compensator#15694sawenzel wants to merge 1 commit into
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This changes the media of volumes that sit outside the field map, diagnosed with the geometry doctor. 17 volumes were built from media that declare a magnetic field, whereas the field there is always zero. This is now fixed by switching five media in place, and by giving a field-free variant to the three volumes whose medium is shared with volumes that do reach the field. The new copper medium also needs its own line in simcuts_COMP.dat, because Geant4 assigns cuts per material and it would otherwise take the default ones. AliceO2Group#15683 Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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This changes the media of volumes that sit outside the field map, diagnosed with the geometry doctor. 17 volumes were built from media that declare a magnetic field, whereas the field there is always zero. This is now fixed by switching five media in place, and by giving a field-free variant to the three volumes whose medium is shared with volumes that do reach the field.
The new copper medium also needs its own line in simcuts_COMP.dat, because Geant4 assigns cuts per material and it would otherwise take the default ones.
#15683