Migma

Migma, sometimes called migmatron or migmacell, was a proposed colliding-beam fusion reactor designed by the physicist Bogdan Maglich in 1969. Rather than heating a bulk plasma, it used self-intersecting beams of ions from small particle accelerators, stored in a magnetic mirror arrangement called the precetron so that the ions orbited in intersecting patterns through the center of the chamber, creating repeated collision opportunities intended to force fusion. Four experimental reactors, Migma I through IV, were built between 1973 and 1982; Migma IV achieved a confinement time of 25 seconds in 1982 and set a fusion triple product record, but the project stalled for lack of funding in the 1980s and never reached a commercial-scale demonstration.