A First-Principles QMU Scalar Gravitational-Wave Detector: Chronovibration, Magnetic Rotation, and RMFD Array Readout with Experimental Calibration Path

This paper develops a first-principles scalar gravitational-wave detector within the Aether Physics Model (APM) using Quantum Measurement Units (QMU). The work proposes a non-interferometric detection channel based on longitudinal chronovibrational displacement of the Aether substrate rather than transverse metric strain. The fundamental scalar observable is defined as \[sclw_d^*=1/F_q∂_t∂_xξ,\] where \(ξ(x,t)\) represents longitudinal Aether displacement. Using the closure identity \[A_u · curl={F_q}^2{λ_C}^2=c^2,\] the paper derives a coupling chain from scalar displacement to magnetic stress perturbation, magnetic rotation, and experimentally measurable pickup-coil voltage. A dimensionless detector observable, \[Υrmfd,\] is introduced for Rotating Magnetic Field Detector (RMFD) arrays and connected directly to measurable engineering quantities through explicit voltage-response equations. The manuscript derives sensitivity scaling laws, gradiometer baseline relations, burst-response formulations, and calibration procedures for the detector coupling coefficient \(κrmfd\). The work further develops a constitutive Matter--Aether estimate for the scalar coupling coefficient by relating longitudinal Aether compression to rotational curl perturbations through the Aether rotational unit \(A_u\). This separates source-side Aether coupling from detector-side instrumental response and provides a pathway toward deriving astrophysical scalar amplitudes from underlying length-density dynamics. The detector framework predicts that core-collapse supernovae and neutron-star formation events should generate stronger scalar-channel signals than compact binary black-hole mergers. A falsifiable experimental criterion is established based on coherent, light-speed, multi-station excess in the RMFD observable during independently confirmed astrophysical collapse events. An engineering appendix provides: pickup-coil response equations, QMU-to-SI bridge relations, charge-conversion scaling for magnetic flux density, minimum detectable signal estimates, broadband burst-search formalism, gradiometer optimization curves, laboratory calibration procedures for \(κrmfd\), practical prototype sensitivity targets. The paper defines a complete theoretical-to-engineering bridge for scalar gravitational-wave detection and establishes a directly testable experimental program for longitudinal Aether dynamics.