Thermonuclear fusion approach, which combines magnetic and inertial confinement methods. The plasma is first held and partially compressed using magnetic fields. It is then heated and compressed to fusion values by some other means, e.g. laser. There are various concepts of magneto-inertial fusion that are being investigated in laboratories. For example, magnetized liner inertial fusion compresses a column of plasma (called a liner) with a Z-pinch and then heats it with an intense laser pulse. Another option is to create a pair of field-reversed configuration plasmoids and accelerate them against each other, resulting in fusion.