The use of magnetic fields to improve the performance of hohlraum-driven implosions on the
National Ignition Facility (NIF) is discussed. The focus is on magnetically insulated inertial
confinement fusion, where the primary field effect is to reduce electron-thermal and alpha-
particle loss from the compressed hotspot (magnetic pressure is of secondary importance).
We summarize the requirements to achieve this state. The design of recent NIF magnetized
hohlraum experiments is presented. These are close to earlier shots in the three-shock, high …