  Significant progress has been made towards laser-driven fusion ignition via
different schemes, including direct and indirect central ignition, fast
ignition, shock ignition, and impact ignition schemes. However, to reach
ignition conditions, there are still various technical and physical challenges
to be solved for all these schemes. Here, our multi-dimensional integrated
simulation shows that the fast-ignition conditions could be achieved when two
2.8 petawatt heating laser pulses counter-propagate along a 3.5 kilotesla
external magnetic field. Within a period of 5 picoseconds, the laser pulses
heat a nuclear fuel to reach the ignition conditions. Furthermore, we present
the parameter windows of lasers and magnetic fields required for ignition for
experimental test.
