Interference or Occupancy at a Double-Slit Dark Fringe: Aperture Transmission and Downstream Detection

This paper presents the 2013 double-slit experiment "Particle Solution to the Double Slit Experiment" (University of Arizona), together with a more rigorous 2026 reconstruction of the same test. Part I reproduces the original study verbatim. A slit was cut at a dark fringe on Screen 1 and the light was measured on Screen 2 behind it. The detector current behind the dark fringe was 1.4 mA, equal to the 1.4 mA laser-off noise. The result was interpreted as supporting the particle view. Part II specifies a high-precision modular protocol designed to discriminate between dark-fringe occupancy and interference: a common baseline (Module 0), the Screen-1 dark-fringe profile (A), an aperture-width series (B), Screen-2 profiles behind dark and bright apertures (C), an offset scan (D), and a closure map (E). The standard optical-field prediction is frozen before acquisition. If no light is observed on Screen 2 behind the dark-fringe aperture while the bright control transmits, the particle view is supported. If two fringes appear, matching the frozen template, the wave view is supported. Status: Part I includes the original 2013 detector readings. Part II is a prospective protocol; no data have been acquired under it. Files: manuscript (PDF), LaTeX source, supplementary forward model (double_slit_field_model.py), and example configuration (asbuilt_example.json), which reproduces the illustrative values in Section II.12.