Magneto-inertial fusion (MIF) describes a class of fusion power devices that combine aspects of magnetic confinement fusion and inertial confinement fusion in an attempt to lower the cost of fusion devices. MIF uses magnetic fields to confine an initial warm, low-density plasma, then compresses that plasma to fusion conditions using an impulsive driver or "liner." The concept is also known as magnetized target fusion (MTF) and magnitnoye obzhariye (MAGO) in Russia.