This example shows a proton daily quality-assurance dashboard, displaying a grid of measurement parameters alongside three concentric donut-style circles that represent treatment room data. Built with React and D3 v6, the visualization uses SVG rendering to compose the interface, combining custom React components for faces and daily room metrics with D3’s pie and arc generators to construct the donut plots. The code also imports area and line generators to draw tabular and spiral shapes, while the dataset consists of 53 named parameters such as position, sigma, and intensity values.