The principles for a continuously operating, nonplasma, nonthermal, fusion power source are presented. The fuel is a 2 MeV deutron beam which is injected, "debeamed" and "self-collided" through precession; the d-d reaction breeds a 3Hed self-colliding mixture ("migma") which is the main source of fusion power. Because of continuing replenishment, the migma does not become Maxwellian. Direct conversion of fusion energy into electricity is accomplished by deceleration of the positively charged ions (fusion products). An elemental power source ("migmacell") that can be built within the bounds of available technology would have a radius of 5 cm and deliver between 10 mW and 10 W of net electric power, depending on the assumptions on the space-charged limit. Ideas to increase the net power output, including local macro-neutralization, are indicated. We outline various ways to combine a large number of the migmacells into a 3-dimensional matrix to make a reactor capable of generating 10 kW of electric power.