Design Blueprint: A Spin-Polarisation Magnetometer: Computed Sensitivity of a Dense Polarised Alkali Ensemble

Design blueprint derived from the source paper (DOI 10.5281/zenodo.24129593): A dense, highly polarised alkali vapour is a magnetic sensor whose fundamental noise limits lie far below what practical instruments achieve, and the gap between the two is where magnetometer design actually happens. Status: DESIGN BLUEPRINT — SIMULATED, NOT MEASURED — NOT BUILT. All numbers are simulated values from the source paper's computation, deposited with this blueprint as compute.py and results.json. AI-use disclosure: Dave, an AI research system, assisted with the computation and drafting under the author's direction; author of record William Alexander Aldred.