Multiple-mirror end-plugged near-reactor parameters are estimated including parallel electron thermal conduction loss which was not taken into account in previous papers in spite of its importance. The assumed thermal conductivity in a multiple mirror is simply 1/M2 times the classical value. Impurity seeding only at the plugs is demonstrated to be effective in increasing the energy confinement time of the plasma and, consequently, in reducing the reactor length by .more than a factor of 1.5. The total reactor length is optimized along with plasma temperature, plug length, and seeding fraction of the impurity. A typical reactor length for B = 100 kG and QE = 2 is calculated to be about 1100 m with an output power of 13 GW.
Problems of a thermonuclear reactor with a rotating plasma