Position of Photon Creation Simulations

Tantalum, Aluminum Beamstop, and Air

Simulation Parameters

Target Matter: Tantalum

Target Length: 0.0508cm

Beamstop Matter: Aluminum

Beamstop Thickness: 1.27cm

Chamber Matter: Air

Tracker Matter: Air

World Matter: Vacuum

Target physically starts at -84.4cm and ends at -84.3492cm

Beamstop starts at -84.3492cm and ends at -83.0792cm

The tracker starts at -83.0792cm and ends at -3.0792cm

Conclusion

The beamstop is not thick enough to prevent electrons from traveling through to brem off of the air in the tracker.

Tantalum, No Beamstop, and Air

Volumes: 1 = Target, 2 = Beamstop, 3 = Tracker, 4 = Chamber, 5 = Else

Simulation Parameters

Target Matter: Tantalum

Target Length: 0.0508cm

Beamstop Matter: Vacuum

Beamstop Thickness: 1.27cm

Chamber Matter: Air

Tracker Matter: Air

World Matter: Vacuum

Target physically starts at -84.4cm and ends at -84.3492cm

Beamstop starts at -84.3492cm and ends at -83.0792cm

The tracker starts at -83.0792cm and ends at -3.0792cm

Conclusion

Majority of photons are being created in the Tantalum target with some gamma conversion happening in the tracker.

Tantalum, No Beamstop, and Vacuum in every volume but target

This image is showing that the majority of the photons are created on the front and rear faces of the target, with very little happening in between.

Volumes: 1 = Target, 2 = Beamstop, 3 = Tracker, 4 = Chamber, 5 = Else

Simulation Parameters

Target Matter: Tantalum

Target Length: 0.0508cm

Beamstop Matter: Vacuum

Beamstop Thickness: 1.27cm

Chamber Matter: Air

Tracker Matter: Air

World Matter: Vacuum

Target physically starts at -83.0508cm and ends at -83.0cm

Beamstop starts at -83cm and ends at -81.73cm

The tracker starts at -81.73cm and ends at -1.73cm

Conclusion

All of the photons are being created inside the tantalum, electrons are definitely making it though the tantalum.

TriMev Simulations