A beam-energy-floor scan lowers beam energy across three rows toward a detection floor, showing how the delivered impulse falls with it row by row. The arithmetic is exact only for the stated energies, areas, times, and rows in the ideal uniform-beam model. Real measurements add beam profile, alignment, reflectivity/absorption, detector calibration, timing/area calibration, surface geometry, and uncertainty.
Finite beam time is scanned below, at, and above an energy floor. Exact arithmetic here means exact results for the stated model inputs; measured inputs still carry uncertainty and significant-figure limits.
highlighted = computed this step
Finite beam energy is scanned through an energy floor
The irradiance source is 6 watts per square meter and illuminated area stays 2 square meters. The time window is 2 s. The asserted product gives 24 J which is below the 48 J floor.
E=IAt=6⋅2⋅2=24J
Finite beam energy is scanned through an energy floor
The irradiance source is 6 watts per square meter and illuminated area stays 2 square meters. The time window is 4 s. The asserted product gives 48 J which is at the 48 J floor.
E=IAt=6⋅2⋅4=48J
Finite beam energy is scanned through an energy floor
The irradiance source is 6 watts per square meter and illuminated area stays 2 square meters. The time window is 6 s. The asserted product gives 72 J which is above the 48 J floor.