2.6. Sources and Boundaries

These tutorials show how volumetric, point, boundary, and adjoint sources drive an OpenSn calculation. They progress from selecting source cells by block ID or logical volume to localized and boundary sources, then show how the same source interface is used in adjoint mode.

See the sources and boundary-conditions reference for the complete Python interface.

• 2.6.1. Material Source Selected by Block ID
• 2.6.2. Volumetric Source over a Logical Volume
• 2.6.3. Point Source
• 2.6.4. Isotropic Boundary Source and Leakage
• 2.6.5. Arbitrary Angular Boundary Source
• 2.6.6. Adjoint Source over a Logical Volume