  To enhance the core heating efficiency in fast ignition laser fusion, the
concept of relativistic electron beam guiding by external magnetic fields was
evaluated by integrated simulations for FIREX class targets. For the
cone-attached shell target case, the core heating performance is deteriorated
by applying magnetic fields since the core is considerably deformed and the
most of the fast electrons are reflected due to the magnetic mirror formed
through the implosion. On the other hand, in the case of cone-attached solid
ball target, the implosion is more stable under the kilo-tesla-class magnetic
field. In addition, feasible magnetic field configuration is formed through the
implosion. As the results, the core heating efficiency becomes double by
magnetic guiding. The dependence of core heating properties on the heating
pulse shot timing was also investigated for the solid ball target.
