Mechanical design aspects of the LIBRA-SP light ion beam driven ICF power reactor

LIBRA-SP is a 1000 MWe light ion beam driven inertial confinement fusion power reactor design study which utilizes a self-pinched mode for propagating ions to the target. It is driven by 7.2 MJ of 30 MeV Li ions of which 1.2 MJ is in prepulse and 6 MJ in the main pulse. The two front rows of tubes are called PERIT units (PErforated RIgid Tubes) and are at a distance of 4 m from the target. The PERIT units receive a 71 Pa-s impulse at 3.9 Hz rep-rate, have a maximum displacement of 0.8 cm and reach a maximum bending stress of 13 MPa. Beam tubes which guide the beams in the self-pinched mode are curved to avoid neutron streaming to the diodes and to avoid making contact with the PERIT units. A method for supporting these beam tubes and remotely aligning them on target is discussed. 5 refs., 5 figs