IGNITED AND HIGH-Q PLASMAS IN IGNITER

Ignitor was proposed as a breakthrough in reaching ignition in a high magnetic field. The evolution of the plasma parameters is analyzed. Di fferent growth scenarios for the plasma current and density are consid ered to optimize the global plasma performance while satisfying stabil ity requirements. The toroidal field is consistent with the current in crease adopted. The alpha particles produced are considered only as a power source for electron and ion thermal energy. The effects of the c urrent ramp rate are discussed, and the importance of the density prof ile growth is indicated. The results show that stable trajectories thr ough the (l(i),q(psi)) plane can be obtained, assuming the inward pinc h is not too large, a (65135) deuterium-tritium mixture still yields a cceptable performance, and a 10% prompt loss of alpha particles is all owed.