  Using a combination of laser-plasma interactions and magnetic confinement
configurations, a conceptual fusion reactor is proposed in this paper. Our
reactor consists of the following: 1) A background plasma of boron11 and
hydrogen ions, plus electrons, is generated and kept for a certain time, with
densities of the order of a milligram/cm3and temperatures of tens of eV. Both
the radiation level and the plasma thermal pressure are thus very low. 2) A
plasma channel is induced in a solid target by irradiation with a high power
laser that creates a very intense shock wave. This mechanism conveys the
acceleration of protons in the laser direction. The mechanisms must be tuned
for the protons to reach a kinetic energy of 600 keV (note that this value is
not a temperature). 3) Those ultra-fast protons enter the background plasma and
collide with a boron11 to produce 3 alphas of 2.9 MeV. 4) Fusion born alphas
collide with protons of the plasma and accelerate them up to 600 keV causing a
chain reaction. 5) A combination of an induction current and a magnetic bottle
keeps the chain reaction process going on, for a pulse long enough to get a
high energy gain. 6) Materials for the background plasma and the laser target
must be replaced for starting a new chain reaction cycle.
