LFMR: Linear Fusion Magnetic Mirror Reactor with Multi-Modal Synchronized Heating and X/UV Irradiation

Version 2.0 (Unified Preprint)AbstractWe present the Linear Fusion Magnetic Mirror Reactor (LFMR), a linear fusion conceptcombining pulsed adiabatic magnetic compression, bidirectional Electron Cyclotron Reso-nance (ECR) heating with frequency chirping, and synchronized X-ray/UV irradiation to in-duce controlled parametric instabilities. The design revives the tandem mirror architectureoriginally developed at Lawrence Livermore National Laboratory (MFTF-B, 1986), whileincorporating recent advances in high-temperature superconducting (HTS) magnets. Thisunified preprint integrates the original conceptual framework (v1.0) with rigorous analyticalcorrections: double-adiabatic (CGL) scaling laws for fast compression, a zero-dimensionalpower balance model for scientific gain Q estimation, and a critical assessment of wave-plasma coupling, axial losses, and magnet engineering constraints. Preliminary 0D modelingindicates that, provided a D-T fuel cycle and a tandem plug confinement factor Gplug ≳ 30,a compact demonstrator could achieve Q ≈ 1–5 at a substantially lower projected cost thanlarge toroidal systems. This document provides a quantitative foundation for transitioningthe concept into kinetic simulation campaigns and experimental validation.