🧲 Silicon Tracker: Track Curvature, Momentum Resolution and Multiple Scattering (2D end-on view)

End-on view of a silicon tracking detector in a solenoid field. A charged particle curves with a radius set by its momentum, crosses layers that each measure a point with a small error and scatter it a little, and a fit to the hits gives the momentum back with an uncertainty. The 3D cutaway has field, momentum and chord-length sliders; this page adds the layers, the hit errors and the material, with four in-page numerical checks.