A fusion program less ambitous in its objectives and technology than the official programs, but such that it could be reduced to practice before the large “ignited” plasma fusion power reactors with “infinite gain” become a reality, is described. “Migmacell” is designed as a “driven” power amplifier, energized by fusion, with a gain of 1.5–3. By recirculating a significant fraction of the output power, migmacell is a small (1 m in diam.), self-sustained power source of 100 kW e to 5 MW e. By using direct nuclear collisions in “self-colliding orbits”, it operates at the equivalent kinetic “temperatures” at least 100 times higher than thermonuclear devices. From the point of view of plasma physics, migmacell is a simple “colliding-beam” mirror with large gyroradius, highly non-adiabatic orbits and highly non-isotropic density, peaked at the center. Focusing action results in low classical end-losses compared to plasma mirrors. The fusion power density is high, 0.1 kW/cm 3. Diamagnetic effects are confined mostly to the central region, where they cause a min-B well. High-energy migma fusion renders it possible to utilize the environmentally acceptable “advanced fuels” such as D, 3He or boron, rather than D-T, thus lending itself to a “clean fusion” power source which is neutron-free or neutron-deficient. Larger plants are envisioned as a plurality of standardized migma-cells, thus solving many problems in power transmission and distribution. Three stages of the program are completed. The experimentally achieved collision energy of ∼1 MeV (equivalent kinetic “temperature” of 10 10 °K) and the energy confinement time of (2.21±0.05) s are sufficient for an advanced-fuel fusion reactor, but the central density of (2.2±0.7)×10 9 d +/cm 3, limited by the vacuum and the injection rate, is low. The colliding beam luminosity (rate per σ=1) is L=10 27 cm −2 s −1. Apparatus for Stage 4 (1 year program) whose aim is to achieve a large density regime ( ω pi/ ω ci) 2⪢10, has been assembled and tested. Stage 5 is (a 5 year program) aims to build a demonstration power unit. Economic projections indicate a competitive power source. State-of-the-art technology is assumed throughout.