The Cascade Engine: A Preliminary Systems Analysis of a Beam-Powered Interstellar Ram-Accelerator

This paper presents a preliminary systems analysis of the Cascade Engine, a beam-powered interstellar ram-accelerator intended to mitigate the classical Bussard ramjet drag limitation through external energy coupling and electromagnetic particle collection. The architecture combines a large-scale magnetic collection system, a relativistic plasma acceleration core, and a controlled particle-recycling loop that functions as a plasmadensity stabilization mechanism. Using relativistic four-momentum accounting, momentum and energy transfer relations are derived for a closed control volume containing the propulsion system and its electromagnetic interaction region. A parametric Monte Carlo sensitivity analysis is used to explore system behavior under stochastic environmental and operational perturbations. Representative acceleration and deceleration profiles for a 4.24- light-year mission to Proxima Centauri are examined. Engineering considerations including beam divergence, pointing accuracy, interstellar dust interactions, synchrotron losses, and thermal radiator requirements are evaluated. The results indicate that the concept remains strongly dependent on large-scale external power beaming and advanced plasma-control technologies, while providing a framework for further investigation of beam-powered interstellar propulsion architectures.